Formation of homogeneous nanostructure via interference of square flattop femtosecond laser pulsesT. Sumimoto and G. Miyaji
Nanomaterials
2025年02月25日, 研究論文(学術雑誌), 共同, 15, 5,
DOI(公開)(r-map), 355-1, 355-11
Stable formation of femtosecond laser-induced periodic nanostructures on glass by using active feedbackG. Miyaji, D. Nagai, T. Miyoshi, H. Takada, D. Yoshitomi, A. Narazaki
Light: Advanced Manufacturing
2025年03月18日, 研究論文(学術雑誌), 共同, 6,
DOI(公開)(r-map), 3-1, 3-9
High performance micromachining of sapphire by laser induced plasma assisted ablation (LIPAA) using GHz burst mode femtosecond pulsesK. Obata, S. Kawabata, Y. Hanada, G. Miyaji, and K. Sugioka
Opto-Electron. Sci.
2024年06月24日, 研究論文(学術雑誌), 共同, 3, 6,
DOI(公開)(r-map), 230053-1, 230053-10
ICT data-driven active laser processingA. Narazaki, D. Yoshitomi, H. Takada, D. Nagai, and G. Miyaji
Photonics Review
2024年05月11日, 研究論文(学術雑誌), 共同, 2024,
DOI(公開)(r-map), 240212
Plasmonic near fields excited with femtosecond laser pulses and surface nanoprocessingGodai Miyaji
Photonics Review
2024年05月11日, 研究論文(学術雑誌), 単独, 2024,
DOI(公開)(r-map), 240203
Formation of two-dimensional laser-induced periodic surface structures on titanium by GHz burst mode femtosecond laser pulsesKawabata, Shota; Bai, Shi; Obata, Kotaro; Ozasa, Kazunari; Miyaji, Godai; Sugioka, Koji
FRONTIERS IN NANOTECHNOLOGY
FRONTIERS MEDIA SA
GHz burst mode femtosecond (fs) laser pulses, which consist of a series of pulse trains with ultra-fast intervals of several hundred picoseconds, have offered distinct features for material processing compared to conventional irradiation of laser pulses (single-pulse mode). We apply GHz burst mode processing to fabricate laser-induced periodic surface structures (LIPSS) on the material surfaces. In our previous work for silicon (Si), we have found that GHz burst mode can create unique two-dimensional (2D) LIPSS composed of both parallel and perpendicular to the laser polarization direction. We proposed that the formation of 2D-LIPSS is attributed to the synergetic contributions of electromagnetic and hydrodynamic mechanisms. To further investigate more detailed formation mechanisms and explore practical applications, we employ titanium (Ti), whose properties are significantly different from Si. We demonstrate that GHz burst mode fs laser pulses (central wavelength: 1,030 nm, intra-pulse width: 230 fs, intra-pulse repetition rate (an intra-pulse interval): 4.88 GHz (205 ps) and burst pulse repetition rate: 10 kHz) can also fabricate 2D-LIPSS on Ti surfaces. We attribute the dominant formation mechanism of 2D-LIPSS to the generation of hot spots with highly enhanced electric fields due to transient change of material properties during GHz burst pulse irradiation. Based on this speculation, properly tailoring the shapes of the burst pulse with an optimum intra-pulse number enables the creation of well-defined 2D-LIPSS. Furthermore, essentially homogeneous 2D-LIPSS can be formed in a large area by laser scanning of a focused fs laser beam with a stage scanning speed of 5 mm/s.
2023年11月20日, 研究論文(学術雑誌), 共同, 5,
DOI(公開)(r-map), 120, 127
Enhancement of plasmonic coupling on Si metallized with intense femtosecond laser pulsesTateda, Mika; Iida, Yuto; Miyaji, Godai
SCIENTIFIC REPORTS
NATURE PORTFOLIO
Using a pump-probe technique, the reflectivity of a silicon grating surface irradiated with intense femtosecond (fs) laser pulses was measured as a function of the incidence angle and the delay time between pulses. After irradiating the surface with an intense s-polarized, 400 nm, 300 fs laser pulse, the reflectivity measured with a weak p-polarized, 800 nm, 100 fs laser pulse exhibited an abrupt decrease for an incidence angle of similar to 24(degrees). The depth of the dip was greatest for a delay time of 0.6-10 ps, for which the reflectivity around the dip was highest. The surface was also found to be ablated most strongly for the conditions causing the deepest dip for a delay time of 5-10 ps. Surface plasmon polaritons (SPPs) on silicon metallized by the intense pulse are resonantly excited by the subsequent pulse, and the strong coherent coupling between the subsequent pulse and SPPs excited on the molten Si surface produced by high-density free electrons induces strong surface ablation due to the intense plasmonic near-field. The results clearly show that fs pulses can be used to significantly modulate the nature of nonmetallic materials and could possibly serve as a basic tool for the excitation of SPPs on nonmetallic materials using ultrafast laser-matter interactions.
2023年10月27日, 研究論文(学術雑誌), 共同, 13, 1, 2045-2322,
DOI(公開)(r-map) Fine periodic nanostructure formation on stainless steel and gallium arsenide with few-cycle 7-fs laser pulsesIshihara, Akihiro; Miyaji, Godai
FRONTIERS IN NANOTECHNOLOGY
FRONTIERS MEDIA SA
We report the fine periodic nanostructure formation process on metal and semiconductor surfaces in air with few-cycle 7-fs laser pulses and its physical mechanism. Using appropriate peak power densities and scanning speeds for the laser pulses, nanostructures could be formed on stainless steel and gallium arsenide (GaAs) with periods of 60–110 nm and 130–165 nm, respectively, which are 1/5–1/4 of the period of nanostructures formed with 100-fs laser pulses. The periodicity can be explained as arising from the excitation of short-range propagating surface plasmon polaritons, and the observed periods are in good agreement with the model calculation results.
2023年09月19日, 研究論文(学術雑誌), 共同, 5,
DOI(公開)(r-map), 11829, 11835
GHz bursts in MHz burst (BiBurst) enabling high-speed femtosecond laser ablation of silicon due to prevention of air ionizationObata, Kotaro; Caballero-Lucas, Francesc; Kawabata, Shota; Miyaji, Godai; Sugioka, Koji
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
IOP Publishing Ltd
For the practical use of femtosecond laser ablation, inputs of higher laser intensity are preferred to attain high-throughput material removal. However, the use of higher laser intensities for increasing ablation rates can have detrimental effects on ablation quality due to excess heat generation and air ionization. This paper employs ablation using BiBurst femtosecond laser pulses, which consist of multiple bursts (2 and 5 bursts) at a repetition rate of 64 MHz, each containing multiple intra-pulses (2-20 pulses) at an ultrafast repetition rate of 4.88 GHz, to overcome these conflicting conditions. Ablation of silicon substrates using the BiBurst mode with 5 burst pulses and 20 intra-pulses successfully prevents air breakdown at packet energies higher than the pulse energy inducing the air ionization by the conventional femtosecond laser pulse irradiation (single-pulse mode). As a result, ablation speed can be enhanced by a factor of 23 without deteriorating the ablation quality compared to that by the single-pulse mode ablation under the conditions where the air ionization is avoided.
2023年06月01日, 研究論文(学術雑誌), 共同, 5, 2, 2631-8644,
DOI(公開)(r-map) Two-dimensional laser-induced periodic surface structures formed on crystalline silicon by GHz burst mode femtosecond laser pulsesS.Kawabata, S.Bai, K.Obata, G.Miyaji, and K.Sugioka
I. J. Extreme Manufacturing
IOP Publishing Ltd
Femtosecond laser pulses with GHz burst mode that consist of a series of trains of ultrashort laser pulses with a pulse interval of several hundred picoseconds offer distinct features in material processing that cannot be obtained by the conventional irradiation scheme of femtosecond laser pulses (single-pulse mode). However, most studies using the GHz burst mode femtosecond laser pulses focus on ablation of materials to achieve high-efficiency and high-quality material removal. In this study, we explore the ability of the GHz burst mode femtosecond laser processing to form laser-induced periodic surface structures (LIPSS) on silicon. It is well known that the direction of LIPSS formed by the single-pulse mode with linearly polarized laser pulses is typically perpendicular to the laser polarization direction. In contrast, we find that the GHz burst mode femtosecond laser (wavelength: 1030 nm, intra-pulse duration: 220 fs, intra-pulse interval time (intra-pulse repetition rate): 205 ps (4.88 GHz), burst pulse repetition rate: 200 kHz) creates unique two-dimensional (2D) LIPSS. We regard the formation mechanism of 2D LIPSS as the synergetic contribution of the electromagnetic mechanism and the hydrodynamic mechanism. Specifically, generation of hot spots with highly enhanced electric fields by the localized surface plasmon resonance of subsequent pulses in the bursts within the nanogrooves of one-dimensional LIPSS formed by the preceding pulses creates 2D LIPSS. Additionally, hydrodynamic instability including convection flow determines the final structure of 2D LIPSS.
2023年03月01日, 研究論文(学術雑誌), 共同, 5, 1, 2631-8644,
DOI(公開)(r-map), 15004-1, 15004-9
In-process monitoring of femtosecond laser-induced periodic nanostructures on glass by using anti-reflective propertyD. Nagai, H. Takada, A. Narazaki, and G. Miyaji
Proceedings of the SPIE
2023年01月31日, 研究論文(国際会議プロシーディングス), 共同,
DOI(公開)(r-map), 12408
Fabrication of nanostructure and deposition of metal particles by femtosecond laser ablation in electrolyteS.Kodama, R.Yabuuchi, G.Miyaji, and W.Natsu
Procedia CIRP
2022年10月01日, 研究論文(学術雑誌), 共同, 113,
DOI(公開)(r-map), 439, 444
Improvement of the optical transmittance of a SiO2 surface by a femtosecond-laser-induced homogeneous nanostructure formationEdakubo, Minami; Richter, Lukas Janos; Haraguchi, Yuyu; Aruga-katori, Hiroko; Ihlemann, Juergen; Miyaji, Godai
OPTICAL MATERIALS EXPRESS
Optica Publishing Group
It has been reported that periodic nanostructures with a period size of 200-330 nm can be formed on silicon suboxide (SiOx, x approximate to 1) with 800-nm, 100-fs laser pulses at a fluence much smaller than that needed for nanostructuring on glasses such as fused silica and borosilicate glass. We demonstrated that a homogeneous SiO2 nanostructure with a period of -240 nm can be produced using a two-step ablation process and heat treatment in air at 1000 degrees C for 144 hours. Optical microscopic images of the nanostructured surface illuminated by non-polarized visible light show that the transmittance increases as the reflectivity decreases.(c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
2022年10月01日, 研究論文(学術雑誌), 共同, 12, 10, 2159-3930,
DOI(公開)(r-map), 3982, 3989
Potential generation of nano-sized mist by passing a solution through dielectric barrier dischargeWatanabe, Ryosuke; Tanaka, Shiori; Miyaji, Godai; Yoshino, Daisuke
SCIENTIFIC REPORTS
NATURE PORTFOLIO
Plasma medicine, a therapeutic technology that uses atmospheric-pressure plasma, is attracting much attention as an innovative tool for the medical field. Most of the plasma biomedical tools use direct effects, such as heat, optical stimulation, and reactive chemical species, on the lesion. Nanoparticulation techniques using indirect action by plasma, i.e., generation of electric fields, have the potential to be applied to promote transdermal absorption, where drugs pass through the barrier function of skin and penetrate into internal tissues. Here, we show a method to directly generate the nano-sized mist by passing a solution through the dielectric barrier discharge. This method enables us to produce the mist potentially in the nanometer size range for both water-based and oil-based solutions. Ease of mist generation was influenced by the plasma-induced changes in physical and chemical characteristics, including electrical conductivity, viscosity, and chemical species. We anticipate the developed method for nano-sized mist generation to provide a technique in the applications of the transdermal absorption system, including those related to pharmaceuticals and cosmetics.
2022年06月22日, 研究論文(学術雑誌), 共同, 12, 1, 2045-2322,
DOI(公開)(r-map) 数サイクルパルスレーザーにより励起された短距離伝搬型表面プラズモン・ポラリトンよる周期ナノ構造形成
飯田悠斗, 宮地悟代, 二階堂誓哉
電気学会論文誌C
2022年04月08日, 研究論文(学術雑誌), 共同, 142, 4, 454, 459
フェムト秒レーザー誘起プラズモニック近接場によるナノ加工
宮地悟代
レーザー研究
レーザー学会
2022年03月31日, 研究論文(学術雑誌), 単独, 50, 3, 128, 132
Sub-100-nm periodic nanostructure formation induced by short-range surface plasmon polaritons excited with few-cycle laser pulsesIida, Yuto; Nikaido, Seiya; Miyaji, Godai
JOURNAL OF APPLIED PHYSICS
AIP Publishing
We have demonstrated that intense 7-fs, similar to 810-nm laser pulses can produce a much finer periodic nanostructure on a diamond-like carbon film through ablation in air than that formed with intense 100-fs, similar to 800-nm laser pulses. The minimum period size is similar to 60nm, corresponding to similar to 1/13 of the center wavelength. To understand the physical mechanism responsible for the finer nanostructuring, we have observed a bonding structural change in the nanostructure with micro-Raman spectroscopy and a scanning transmission electron microscope. It has been found that the modified layer thickness with the 7-fs pulses is much thinner than that with the 100-fs pulses. The results show that the 7-fs pulses create a few-nm-thick layer with high-density electrons and excite short-range surface plasmon polaritons, which have a large wave number around the layer and induce the plasmonic near-field nanoablation. The period size estimated by using a model target reproduces well the observed size of nanostructures.
2021年11月08日, 研究論文(学術雑誌), 共同, 130, 18, 0021-8979,
DOI(公開)(r-map) 機能性光学表面作製のためのレーザーナノ加工技術
宮地悟代
化学工業
2020年09月01日, (MISC)総説・解説(商業誌), 単独, 71, 9, 567, 574
Fabrication of Periodic Nanostructures on Silicon Suboxide Films with Plasmonic Near-Field Ablation Induced by Low-Fluence Femtosecond Laser PulsesTakaya, Tatsuyoshi; Miyaji, Godai; Takahashi, Issei; Richter, Lukas Janos; Ihlemann, Juergen
NANOMATERIALS
MDPI
Silicon suboxide (SiOx,x approximate to 1) is a substoichiometric silicon oxide with a large refractive index and optical absorption coefficient that oxidizes to silica (SiO2) by annealing in air at similar to 1000 degrees C. We demonstrate that nanostructures with a groove period of 200-330 nm can be formed in air on a silicon suboxide film with 800 nm, 100 fs, and 10 Hz laser pulses at a fluence an order of magnitude lower than that needed for glass materials such as fused silica and borosilicate glass. Experimental results show that high-density electrons can be produced with low-fluence femtosecond laser pulses, and plasmonic near-fields are subsequently excited to create nanostructures on the surface because silicon suboxide has a larger optical absorption coefficient than glass. Calculations using a model target reproduce the observed groove periods well and explain the mechanism of the nanostructure formation.
2020年08月, 研究論文(学術雑誌), 共同, 10, 8,
DOI(公開)(r-map), 1495-1, 1495-10
フェムト秒レーザーによる表面プラズモンの過渡励起とナノ加工への応用
宮地悟代
光アライアンス
2020年06月01日, (MISC)総説・解説(商業誌), 単独, 31, 6, 44, 47
フェムト秒レーザーを利用した表面ナノ加工技術
宮地悟代
光技術コンタクト
2020年04月01日, (MISC)総説・解説(商業誌), 単独, 58, 4, 28, 35
Structural coloration of a stainless steel surface with homogeneous nanograting formed by femtosecond laser ablationTamamura, Yoshiki; Miyaji, Godai
OPTICAL MATERIALS EXPRESS
OPTICAL SOC AMER
Using the two-step ablation process with femtosecond (fs) laser pulses, a homogeneous nanograting with a uniform period was formed on the stainless steel. The surface color was evaluated with a photograph taken as functions of an incident angle of white light and an observation angle. We have found that the color has more variation and brightness than that of the surface with a non-uniform periodic nanostructure produced with the single-beam fs laser pulses. The results show that the nanograting can spatially disperse well the incident light into individual wavelength owing to the diffraction with high efficiency. Calculation using the grating equation reproduced the characteristic change of the colors observed as functions of these angles. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
2019年07月01日, 研究論文(学術雑誌), 共同, 9, 7, 2159-3930,
DOI(公開)(r-map), 2902, 2909
Reduced damping of surface plasmon polaritons on silicon with intense femtosecond laser pulseMiyaji, Godai; Hagiya, Masato
JAPANESE JOURNAL OF APPLIED PHYSICS
IOP PUBLISHING LTD
Using intense p-polarized 100-femtosecond laser pulses, the reflectivity of a silicon grating was measured in air as a function of the incident angle. The angular dependent reflectivity was observed to abruptly decrease to create a sharp dip at a specific incident angle, representing the surface plasmon resonance (SPR) induced on the grating. We have found that the sharpness of the dip increases with increasing the laser fluence. The experimental results show that the increase in the laser fluence produces a higher density of free electrons in the surface and decreases the plasmon damping to enhance the SPR. The calculated reflectivity reproduces well the increase in the dip sharpness with increasing the electron density in the silicon grating surface. (C) 2019 The Japan Society of Applied Physics
2019年05月01日, 研究論文(学術雑誌), 共同, 58, 5, 0021-4922,
DOI(公開)(r-map) Nanostructure Formation on Diamond-Like Carbon Films Induced with Few-Cycle Laser Pulses at Low Fluence from a Ti:Sapphire Laser OscillatorNikaido, Seiya; Natori, Takumi; Saito, Ryo; Miyaji, Godai
NANOMATERIALS
MDPI
This study reports the results of experiments on periodic nanostructure formation on diamond-like carbon (DLC) films induced with 800 nm, 7-femtosecond (fs) laser pulses at low fluence from a Ti:sapphire laser oscillator. It was demonstrated that 7-fs laser pulses with a high power density of 0.8-2 TW/cm(2) at a low fluence of 5-12 mJ/cm(2) can form a periodic nanostructure with a period of 60-80 nm on DLC films. The period decreases with increasing fluence of the laser pulses. The experimental results and calculations for a model target show that 7-fs pulses can produce a thinner metal-like layer on the DLC film through a nonlinear optical absorption process compared with that produced with 100-fs pulses, creating a finer nanostructure via plasmonic near-field ablation.
2018年07月, 研究論文(学術雑誌), 共同, 8, 7, 2079-4991,
DOI(公開)(r-map) レーザ誘起プラズモニック近接場を用いたナノ加工と計算手法
レーザ加工学会誌
レーザ加工学会
2018年06月01日, (MISC)総説・解説(学術雑誌), 単独, 25, 2, 75, 80
コラム:私はこうして物理を選んでしまった「ふと気がついたら物理にいた」
宮地悟代
パリティ
丸善
2018年04月01日, (MISC)総説・解説(商業誌), 33, 4, 25, 25
Nanoablation of Si surface with femtosecond-laser-induced plasmonic near-fields
G.Miyaji
Proceedings of SPIE
SPIE
2018年01月30日, (MISC)総説・解説(国際会議プロシーディングズ), 共同
Excitation of surface plasmon polaritons on silicon with an intense femtosecond laser pulseMiyaji, Godai; Hagiya, Masato; Miyazaki, Kenzo
PHYSICAL REVIEW B
AMER PHYSICAL SOC
We report the experimental observation of anomalies appearing in the reflection of intense p-polarized 100-femtosecond (fs) laser pulses at a nonmetallic material surface with a grating structure. The reflectivity was measured in air as a function of the angle of incidence at a Si grating. The results have exhibited an abrupt decrease to create a sharp dip at a specific incident angle of similar to 24 degrees, where the grating surface was deeply ablated along the edge of the grooves. Similar to the so-called Wood's anomalies, the observed angle-dependent reflectivity provides direct evidence that surface plasmon polaritons (SPPs) can resonantly be excited at the interface between air and the nonmetallic material surface, as the intense fs laser pulse produces a high density of free electrons to form a metal-like layer on the Si grating surface. Calculation for a model target reproduces well the experimental results to confirm the excitation of SPPs on the Si grating, demonstrating the generation of enhanced near fields for the periodic ablation of a target surface.
2017年07月, 研究論文(学術雑誌), 共同, 96, 4, 2469-9950,
DOI(公開)(r-map) Excitation of surface plasmon polaritons on Si with an intense femtosecond laser pulse宮地悟代,萩谷将人,宮崎健創
Physical Review B
2017年07月, 研究論文(学術雑誌), 共同, 96, 4,
DOI(公開)(r-map), 045122
Nanograting formation in air through plasmonic near-field ablation induced by femtosecond laser pulses宮地悟代,宮崎健創
Proceedings of SPIE
2017年02月, 研究論文(学術雑誌), 共同, 10091,
DOI(公開)(r-map) 表面プラズモンで解き明かすレーザー誘起表面ナノ周期構造生成
宮地悟代
光学・画像専門誌「O plus E」
2016年11月, 単独, 38, 11, 1027, 1033
Fabrication of 50-nm period gratings on GaN in air through plasmonic near-field ablation induced by ultraviolet femtosecond laser pulsesGodai Miyaji, Kenzo Miyazaki
Optics Express
2016年03月, 研究論文(学術雑誌), 共同, 24, 5,
DOI(公開)(r-map), 4648, 4653
Nanograting formation on metals in air with interfering femtosecond laser pulsesK.Miyazaki, G.Miyaji, and T.Inoue
Applied Physics Letters
2015年08月, 研究論文(学術雑誌), 共同, 107, 7,
DOI(公開)(r-map), 071103/1, 5
講義のむずかしさを知る
宮地悟代
大学の物理教育
2015年03月, 研究論文(学術雑誌), 単独, 21, 1, 4, 7
Periodic nanostructures on titanium dioxide film produced using femtosecond laser with wavelengths of 388 nm and 775 nmT.Shinonaga, M.Tsukamoto, and G.Miyaji
Optics Express
2014年06月, 研究論文(学術雑誌), 共同, 22, 12,
DOI(公開)(r-map), 14696, 14704
Data-driven laser processing: What does the fusion of laser processing and data science bring?
Hot Topic in LASE Symposium of SPIE. Photonics West 2025
2025年01月27日, 口頭発表(基調)
Direct surface nanopatterning with few-cycle femtosecond laser pulses
The 4th International Workshop on Frontiers in Lasers and Applications (FLA-4)
2024年07月08日, 口頭発表(基調)
Data-driven ultrashort pulse laser processing and its application to glass materials
PLI Conferences 2024
2024年06月18日, 口頭発表(招待・特別)
Data-driven ultrashort pulse laser processing toward next-generation of precision microfabrication
The 25th International Symposium on Laser Precision Microfabrication (LPM2024)
2024年06月14日, 口頭発表(招待・特別)
Data-driven Ultrashort Pulse Laser Processing of Glass Materials toward Stable and High-throughput Manufacturing
Conference on Lasers and Electro-Optics (CLEO) 2024
2024年05月06日, 口頭発表(招待・特別)
Fine-periodic nanostructure formation on solids with few-cycle femtosecond laser pulses
Conference on Lasers and Electro-Optics (CLEO) 2024
2024年05月06日, 口頭発表(招待・特別)
Stable LIPSS Formation on Transparent Materials by Data-Driven Ultrashort Pulse Laser Processing
Lasers and Photonics for Advanced Manufacturing in SPIE. Photonics Europe 2024
2024年04月10日, 口頭発表(招待・特別)
Direct surface nanopatterning with intense femtosecond-laser-induced plasmonic near-fields
The 4th International Conference on. Optics, Photonics, and Lasers (OPL-2023)
2023年12月04日, 口頭発表(基調)
Direct nanopatterning by surface plasmons with intense femtosecond laser pulses
The 12th International Conference on Photo-Excited Processes and Applications (ICPEPA- 12)
2023年09月18日, 口頭発表(招待・特別)
Fundamental physical process of surface plasmon polaritons on non-metallic material with an intense ultrashort laser pulse
International Workshop on Laser Material Processing and Applications (LMPA2023)
2023年09月04日, 口頭発表(招待・特別)
Data-Driven Ultrashort Pulse Laser Processing Based on Novel In-Process Monitoring and AI High-Speed Optimization
Conference on Lasers and Electro-Optics (CLEO) 2023
2023年05月10日, 口頭発表(招待・特別)
フェムト秒レーザー誘起表面ナノ周期構造形成の基礎とガラスへの応用
第5回多元技術融合光プロセス研究会
2023年03月02日, 口頭発表(招待・特別)
高強度フェムト秒レーザー誘起表面プラズモンを用いた微細加工技術
一般社団法人日本オプトメカトロニクス協会(JOEM) 第3回光部品生産技術部会Web講演会
2023年02月14日, 口頭発表(招待・特別)
Improvement of Optical Transmittance of Glass by Direct Nanopatterning with Femtosecond-Laser-Induced Plasmonic Near-Fields
3th International Workshop on Frontiers in Lasers and Applications (FLA-3)
2022年12月04日, 口頭発表(基調)
Data-driven ultrashort pulse laser processing toward real-time CPS
ICALEO2022
2022年10月16日, 口頭発表(招待・特別)
フェムト秒レーザーによりSiO2表面に形成した均一なナノ構造とその反射・透過特性
第82回応用物理学会秋季学術講演会
2022年09月11日, 口頭発表(一般)
Controlling of surface plasmons with intense femtosecond laser pulses and direct nanopatterning
The 13th International Conference on Information Optics and Photonics (CIOP2022)
2022年08月07日, 口頭発表(招待・特別)
フェムト秒レーザーによるガラス表面周期構造形成過程の無反射特性を利用したインプロセスモニタリング
電気学会光・量子デバイス研究会
2022年03月28日, 口頭発表(一般)
GHzバーストモードフェムト秒レーザーによる結晶シリコン表面への新奇表面微細構造の形成
第69回応用物理学会春季学術講演会
2022年03月24日, 口頭発表(一般)
GHzバーストモードフェムト秒レーザーパルスを用いたサファイアのLIPAA加工
第69回応用物理学会春季学術講演会
2022年03月24日, 口頭発表(一般)
フェムト秒レーザー励起表面プラズモンを利用した表面ナノ加工
レーザー学会学術講演会第42回年次大会
2022年01月14日, 口頭発表(招待・特別)
Femtosecond laser pulses with GHz bursts in MHz burst for ablation enhancement circumventing air ionization
第82回応用物理学会秋季学術講演会
2021年09月11日, 口頭発表(一般)
アジマス偏光超短パルスレーザーによる方向依存性の少
ない構造色形成
第82回応用物理学会秋季学術講演会
2021年09月11日, 口頭発表(一般)
ダブルパルスフェムト秒レーザーによりSi表面に誘起されるプラズモニック・ナノアブレーションの制御
第82回応用物理学会秋季学術講演会
2021年09月11日, 口頭発表(一般)
【注目講演】GHzバーストモードフェムト秒レーザーパルスによる銅アブレーション加工中に発生するプラズマ遮蔽の影響
第82回応用物理学会秋季学術講演会
2021年09月10日, 口頭発表(一般)
Direct nanopatterning on solid surfaces with femtosecond-laser-induced plasmonic near-fields
International Workshop on Frontiers in Lasers and Applications (FLA-2)
2021年06月28日, 口頭発表(基調)
Observation of Surface Plasmon Polaritons excited on Si Transiently Metalized with An Intense Femtosecond Laser Pulse
CLEO-EUROPE2021
2021年06月24日, 口頭発表(一般)
Effect of electrolyte on ultrashort-pulsed laser ablation
LPM2021
2021年06月08日, 口頭発表(一般)
Controlling plasmonic nanoablation on silicon with double-pulse femtosecond laser
LPM2021
2021年06月08日, 口頭発表(一般)
Direct nanofabrication on solids with plasmonic near-field ablation induced by femtosecond laser pulses
39th International congress on applications of lasers & electro-optics (ICALEO 2020)
2020年10月20日, 口頭発表(招待・特別)
フェムト秒レーザー誘起プラズモニック近接場アブレーションによる直接ナノ加工とその応用
先進機能性表面・構造を創出するレーザー表層加工研究会
2020年09月29日, 口頭発表(招待・特別)
高強度フェムト秒レーザー照射による非金属表面への表面プラズモンの励起
レーザー学会学術講演会第40回年次大会年次大会
2020年01月21日, 口頭発表(招待・特別)
アキシコンミラーを用いた非回折超短パルスレーザーの出力特性
レーザー学会第539回研究会「レーザー計測とその応用」
2019年12月06日, 口頭発表(一般)
Origin of fluence dependence of periodicity in nanostructuring on diamond-like carbon films with femtosecond laser pulses
International Conference on Ultrafast Optical Science (UltrafastLight-2019)
2019年10月01日, 口頭発表(招待・特別)
フェムト秒レーザーによる表面プラズモンの過渡励起とナノ加工
電子通信情報学会超高速エレクトロニクス研究会
2019年09月27日, 口頭発表(招待・特別)
超短パルスレーザーのための環状ビーム変換器とその出力特性
第80回応用物理学会秋季学術講演会
2019年09月17日, 口頭発表(一般)
フェムト秒レーザー誘起プラズモニック近接場によるナノ加工
電気学会c部門大会
2019年09月05日, 口頭発表(招待・特別)
Surface Nanofabrication with femtosecond-laser-induced plasmonic near-fields
7th IAPLE Annual Conference and AGM
2019年07月30日, 口頭発表(招待・特別)
Nanostructure formation on Silicon suboxide with plasmonic near-field ablation induced by femtosecond laser pulses
CLEO-EUROPE2019
2019年06月23日, 口頭発表(一般)
低フルーエンス数サイクルレーザパルスによるDLC表面へのナノ構造生成
第91回レーザ加工学会講演会
2019年06月21日, 口頭発表(招待・特別)
SiOxへのフェムト秒レーザー誘起ナノ構造生成
電気学会光・量子デバイス研究会
2019年03月29日, 口頭発表(一般)
フェムト秒レーザーによるSiOx上のナノ構造生成過程
第66回応用物理学会春季学術講演会
2019年03月09日, 口頭発表(一般)
Characterization of surface plasmons inducing nanoablation on nonmetallic materials excited with intense femtosecond laser pulses
Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIX in Photonics West 2019
2019年02月03日, 口頭発表(招待・特別)
フェムト秒レーザーを利用したナノ加工
応用物理学会・第62回光波センシング技術研究会
2018年12月04日, 口頭発表(招待・特別)
Manipulation by surface plasmon resonances: optical and materials aspects
International Conference on Ultrafast Optical Science (UltrafastLight-2018)
2018年10月01日, 口頭発表(招待・特別)
Controlling of plasmon damping on nonmetallic gratings excited with intense femtosecond laser pulses
International Conference on Ultrafast Optical Science (UltrafastLight-2018)
2018年10月01日, 口頭発表(招待・特別)
Nanograting formation with plasmonic near-field ablation controlled by femtosecond laser pulses
Seminar in Laser-Laboratorium Göttingen e.V. (LLG)
2018年09月28日, 公開講演,セミナー,チュートリアル,講習,講義等
Development of high-efficiency ultrashort-pulse ring beam converter with axicon mirrors
The 9th International Symposium of Advanced Energy Science
2018年09月04日, ポスター発表
Excitation of surface plasmon polaritons on non-metallic materials with intense femtosecond laser pulses and its application to nano-processing
Laser Precision Micromachining (LPM2018)
2018年06月26日, 口頭発表(招待・特別)
高強度フェムト秒レーザーによる非金属への表面プラズモンの励起とナノ加工への応用
第151回 電気学会 光・量子デバイス技術委員会
2018年06月07日, 口頭発表(招待・特別)
A high-efficiency ring beam converter with axicon mirror
The 7th Advanced Lasers and Photon Sources 2018(ALPS2018)
2018年04月26日, ポスター発表
Observation of surface plasmon polaritons on nonmetallic materials excited with intense femtosecond laser pulses
International Workshop on Frontiers in Lasers and Applications (FLA 2018)
2018年04月19日, 口頭発表(基調)
超短パルスレーザーのための高効率リングビーム変換器
第65回応用物理学会春季学術講演会
2018年03月18日, ポスター発表
Si上のフェムト秒レーザー励起表面プラズモンの伝搬損失
第65回応用物理学会春季学術講演会
2018年03月18日, ポスター発表
フェムト秒レーザーでシリコンに励起した表面プラズモンの減衰特性
光・量子デバイス研究会
2018年03月09日, 口頭発表(一般)
Nanoablation of Si surface with femtosecond-laser-induced plasmonic near-fields
Laser-Based Micro- and Nano- Processing XII in Photonics West 2018
2018年01月30日, 口頭発表(招待・特別)
低フルーエンス照射におけるフェムト秒レーザー誘起ナノ構造生成
レーザー学会学術講演会第38回年次大会
2018年01月24日, 口頭発表(一般)
フェムト秒レーザー励起表面プラズモンを利用したナノ加工
ナノオプティクス研究グループ 第24回研究討論会
2017年11月30日, 口頭発表(招待・特別)
フェムト秒レーザーによる表面プラズモンの励起とナノ加工への応用
超高速光エレクトロニクス研究会
2017年11月17日, 口頭発表(招待・特別)
Plasmonic near-fields ablation on Si induced with an intense femtosecond laser pulse
International Conference on Ultrafast Optical Science
2017年10月04日, 口頭発表(招待・特別)
数サイクルレーザーパルスによるDLC薄膜表面のナノ構造生成過程
第78回応用物理学会秋季学術講演会
2017年09月07日, 口頭発表(一般)
Development of material nanoprocessing technique with femtosecond-laser-induced plasmonic near fields
The 8th International Symposium of Advanced Energy Science
2017年09月05日, ポスター発表
Morphological change of Si surfaces induced by plasmonic near-field ablation excited with an intense femtosecond laser pulse
ALPS17
2017年04月20日, ポスター発表
フェムト秒レーザーによるシリコン表面へのプラズモニック近接場の励起とアブレーション形状変化の観測
第64回応用物理学会春季学術講演会
2017年03月14日, 口頭発表(招待・特別)
フェムト秒レーザー励起プラズモニック近接場によるシリコン表面のナノアブレーション
光・量子デバイス研究会
2017年03月10日, 口頭発表(一般)
Nanograting formation in air through plasmonic near-field ablation induced by femtosecond laser pulses
LAMOM XXII in Photonics West 2017
2017年02月01日, 口頭発表(招待・特別)
フェムト秒レーザーを用いたTi表面へのナノ周期構造形成における誘電率依存性
第77回応用物理学会秋季学術講演会
2016年09月14日, 口頭発表(一般)
シリコン表面のフェムト秒レーザー励起プラズモンとアブレーション形状の変化の観測
第77回応用物理学会秋季学術講演会
2016年09月14日, 口頭発表(一般)
Nanoablation on solid surfaces with 7-fs laser pulses
The 7th International Symposium of Advanced Energy Science
2016年09月05日, ポスター発表
Controlling Self-Organization of Femtosecond-Laser-Pumped Solid Surfaces for Nanograting Formation
LPM2016
2016年05月24日, 口頭発表(一般)
Observation of surface plasmon polaritons on Si with an intense femtosecond laser pulse
LPM2016
2016年05月24日, 口頭発表(一般)
Nanoablation on Si induced by surface plasmon polaritons with an intense femtosecond laser pulse
ALPS16
2016年05月19日, ポスター発表
数サイクルレーザーパルスによる固体表面へのナノ加工
第63回応用物理学会春季学術講演会
2016年03月21日, ポスター発表
高強度フェムト秒レーザー照射によりシリコンへ励起された表面プラズモンポラリトンの観測
第63回応用物理学会春季学術講演会
2016年03月21日, 口頭発表(一般)
高強度フェムト秒レーザーによりSi回折格子に励起した表面プラズモンポラリトンの観測
光・量子デバイス研究会
2016年03月11日, 口頭発表(一般)
フェムト秒レーザー励起表面プラズモンポラリトンによるシリコン表面のナノアブレーション
レーザー学会学術講演会第36回年次大会
2016年01月09日, 口頭発表(一般)
基礎工学部で学んだことと今の自分
第8回シグマ・ルネサンス塾講演会
2016年01月08日, 口頭発表(招待・特別)
フェムト秒レーザーによる大気中での表面ナノ周期構造形成
第22 回技術・研究発表交流会
2015年09月30日, 口頭発表(一般)
フェムト秒レーザーによるシリコン表面への表面プラズモンポラリトン励起の実証
第76回応用物理学会秋季学術講演会
2015年09月13日, 口頭発表(一般)
Nanostructure Formation on Solid Surfaces with Few-cycle Laser Pulses
The 6th International Symposium of Advanced Energy Science
2015年09月01日, ポスター発表
フェムト秒レーザーの非熱的相互作用によるSi表面でのナノ周期構造形成
第82回レーザ加工学会講演会
2015年01月14日, 口頭発表(招待・特別)
フェムト秒レーザー誘起表面ナノ周期構造生成の超高速ダイナミクス
レーザー学会学術講演会第35回年次大会
2015年01月11日, 口頭発表(招待・特別)
Controlling Periodic Nanostructure Formation on Metal Surfaces with Femtosecond Laser Pulses
ICPEPA-9
2014年10月01日, 口頭発表(一般)
Fabrication of Nanograting with Plasmonic Near-field induced by Ultraviolet Femtosecond Laser Pulses
ICPEPA-9
2014年09月30日, 口頭発表(一般)
Attosecond Pulse Generation with Carrier-Envelope Phase Stabilized Few-Cycle Laser Pulses
The 5th International Symposium of Advanced Energy Science
2014年09月29日, ポスター発表
フェムト秒レーザー誘起表面プラズモンポラリトンによる金属表面のナノ格子形成
第75回応用物理学会秋季学術講演会
2014年09月17日, 口頭発表(一般)
CEP制御サイクルレーザーパルスによるアト秒パルス発生
LSJ第465回研究会「レーザー応用」
2014年09月08日, 口頭発表(一般)
フェムト秒レーザーアブレーションによるナノ格子創製
LSJ第465回研究会「レーザー応用」
2014年09月08日, 口頭発表(一般)
Nanograting Formation with Ultraviolet Femtosecond Laser Ablation
LPM2014
2014年06月20日, 口頭発表(一般)
Mechanism of Femtosecond-Laser-Induced Periodic Nanostructure Formation on Metal Surface
LPM2014
2014年06月19日, 口頭発表(一般)
フェムト秒レーザーの非熱的相互作用によるSi表面でのナノ周期構造形成
第82回レーザ加工学会講演会
2014年01月14日, 口頭発表(招待・特別)
Journal of Laser Micro/Nanoengineering
Editor
自 20230101, 至 20241031
応用物理学会
代議員
自 20231101, 至 20251031
The 4th International Workshop on Frontiers in Lasers and Applications (FLA-4)
Steering Committee Chair
自 20230401, 至 20240831
The 14th International Conference on Information Optics and Photonics(CIOP 2023)
Program Subcommittee
自 20230401, 至 20230831
Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXIX in SPIE. Photonics West 2024
Co-Chair
自 20230301, 至 20240228
レーザー学会
第44回年次大会 副実行委員長
自 20230204, 至 20240531
The 24th International Symposium on Laser Precision Microfabrication (LPM2023)
Steering Committee
自 20220601, 至 20230731
レーザー学会
研究委員会 委員
自 20220601, 至 20260531
The 24th International Symposium on Laser Precision Microfabrication (LPM2023)
Steering Committee
自 20220401, 至 20230630
電気学会
調査専門委員会委員長
自 20211201, 至 202203
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超高速光エレクトロニクス特別研究専門委員会第1部会副査
自 20210601, 至 202203
OSA
CLEO Pacific Rim 2022 Program Committee
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FLA
FLA-3 Steering Committee
自 20210101, 至 20221231
SPIE
SPIE Photonics West 2022 Program Committee
自 20210101, 至 20220228
COLA
COLA 2021/2022 Organizing Committee
自 20200601, 至 20220531
電子情報通信学会
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レーザ加工学会
LAMP2018実行委員会 委員
自 20181204, 至 20190930
電気学会
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自 20171201, 至 20191130
Frontier of Laser Application Congress
FLA2018 実行委員会 委員
自 20171101, 至 20180531
日本光学会
学会誌「光学」編集委員
自 20170401, 至 20200331
電気学会
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自 20141201, 至 20211131
レーザー学会
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レーザー学会
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