International conference (Invited)

2025

  • Fabrication of terahertz meta-optics using ultrashort pulse laser processing
    Kuniaki Konishi
    SPIE Photonics West 2025 (2025/1/27, Moscone Center, San Francisco, USA)

2024

  1. Lightwave control using free-standing dielectric nanomembrane structures
    Kuniaki Konishi
    Optics & Photonics Taiwan International Conference (OPTIC2024) (204/11/27, Nangang Exhibition Center Hall 1, Taipei, Taiwan)
  2. Structured Freestanding Nano-/Micro- Membrane as a New Platform of Meta-Optics
    Kuniaki Konishi
    The 18th International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials’ 2024)　(2024/9/11, Minoa Palace Hotel, Platanias, Greece)
  3. Fabrication of terahertz metalenses using femtosecond laser processing
    Kuniaki Konishi
    SPIE Optics + Photonics 2024 (2024/8/18, San Diego Convention Center, San Diego, USA)
  4. High-precision observation and simulation of femtosecond laser ablation
    Kuniaki Konishi
    9th Workshop on Nanocarbon Photonics and Optoelectronics (NPO2024) (2024/8/8,  the Spa hotel Rauhalahti, Kuopio, Finland) 
  5. Control of Circular Polarization Using Nonlinear Optical Effect in Dielectric Membrane Nanostructures
    Kuniaki Konishi
    14th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META2024) (2024/7/18, Toyama International Conference Center, Toyama, Japan)
  6. Generation and polarization control of vacuum ultraviolet coherent light using dielectric nanomembrane metastructures
    Kuniaki Konishi
    The 7th International Workshop on UV Materials and Devices (IWUMD2024), (2024/6/4, Taipei International Convention Center, Taipei, Taiwan)
  7. Microstructures for Terahertz Wave Control Fabricated by Ultrafast Laser Processing
    Kuniaki Konishi
    The 19th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS2024), (2024/5/3, Kyoto University of Advanced Science (KUAS), Kyoto, Japan)
  8. Generation and polarization control of coherent vacuum ultraviolet light using the nonlinear optical response of dielectric membrane metasurface
    Kuniaki Konishi
    2024 Annual Meeting of the Physical Society of Taiwan (2024/1/24, National Central University, Taoyuan, Taiwan)

2023

  1. The Visualization of Local Fluence Dependence in the Femtosecond Laser Processing of Dielectrics
    Haruyuki Sakurai
    The 84th JSAP Autumn Meeting 2023 [JSAP-Optica Joint Symposia 2023] (2023/9/19, Kumamoto, Japan)
  2. Terahertz broadband anti-reflection moth-eye structures and its applications
    Kuniaki Konishi
    SPIE Optics + Photonics 2023 (2023/8/21, San Diego, USA)
  3. Vacuum Ultraviolet Light Generation and Circular Polarization Control Using Dielectric Nanomembranes
    Kuniaki Konishi
    The 13th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META2023)  (2023/7/19, Paris, France)
  4. Broadband Anti-Reflection Moth-Eye Structures in the Terahertz Region Fabricated by Ultrashort- Pulsed Laser Processing
    Kuniaki Konishi
    The 9th International Conference on Antennas and Electromagnetic Systems (AES2023), (2023/6/8, Torremolinos, Spain)

2022

  1. Photonic crystal nanomembranes: a new tool for wavelength conversion and polarization control in the vacuum ultraviolet region
    Kuniaki Konishi
    SPIE Optics + Photonics 2022, 12201-7 (2022/8/21, San Diego, U.S.A)
  2. Metamaterials for controlling and generating circular polarization
    Kuniaki Konishi, Makoto Kuwata-Gonokami
    EPS symposium on the third generation metamaterials (METAMATERIALS 3.1) (2022/8/3)
  3. Generating THz pulses with longitudinal electromagnetic field
    Kuniaki Konishi
    Nanocarbon Photonics and Optoelectronics (NPO2022) (2022/8/1)
  4. Development of Three-Dimensional Fabrication Technologies Using Laser Processing and 3D Printing for Terahertz Optics Production
    Kuniaki Konishi
    the 8th International Conference on Antennas and Electromagnetic Systems (AES2022) (2022/5/27)

International conference (Regular)

2025

  1. Three-dimensional THz integrated circuits for the 200–400 GHz band using a 3D printer and metal plating
    Kentaro Soeda, Kazunori Naganuma, Yoshinori Yamaguchi, Kuniaki Konishi, Hiroharu Tamaru, Norikatsu Mio, Tadao Nagatsuma, Hiroshi Ito, Junji Yumoto
    SPIE Photonics West 2025 (2025/1/30, Moscone Center, San Francisco, USA)
  2. Trans-timescale complex optical electric-field imaging for femtosecond laser processing of dielectric materials
    Shotaro Kawano, Keiichiro Toda, Haruyuki Sakurai, Kuniaki Konishi, Takuro Ideguchi
    SPIE Photonics West 2025 (2025/1/28, Moscone Center, San Francisco, USA)
  3. Nomarski interferometer with sub-micron spatial resolution for time-resolved complex-amplitude imaging of femtosecond laser-induced air plasma
    Kimura Wataru, Shotaro Kawano, Ryohei Yamada, Haruyuki Sakurai, Kuniaki Konishi, Norikatu Mio
    SPIE Photonics West 2025 (2025/1/27, Moscone Center, San Francisco, USA)

2024

  1. Detection of Dark Plasmon Modes of a Single Gold Rod by Radially Polarized Terahertz Pulses
    Mizuho Matoba, Kuniaki Konishi, Norikatsu Mio, Junji Yumoto, Makoto Kuwata-Gonokami
    9th Workshop on Nanocarbon Photonics and Optoelectronics (NPO2024) (2024/8/7,  the Spa hotel Rauhalahti, Kuopio, Finland, Poster) 
  2. Time-phase imaging of femtosecond laser-induced air plasma with high spatial resolution
    Wataru Kimura, Shotaro Kawano, Ryohei Yamada, Haruyuki Sakurai, Kuniaki Konishi, Norikatsu Mio
    9th Workshop on Nanocarbon Photonics and Optoelectronics (NPO2024) (2024/8/7,  the Spa hotel Rauhalahti, Kuopio, Finland, Poster) 
  3. Fabrication and characterization of THz meta- lens by ultraviolet femtosecond laser ablation
    Y. Hakamada, M. Matoba, H. Sakurai, K. Konishi
    9th Workshop on Nanocarbon Photonics and Optoelectronics (NPO2024) (2024/8/7,  the Spa hotel Rauhalahti, Kuopio, Finland, Poster) 
  4. Terahertz meta-optics made with ultrashort pulse laser processing
    Haruyuki Saukrai, Kuniaki Konishi
    9th Workshop on Nanocarbon Photonics and Optoelectronics (NPO2024) (2024/8/7,  the Spa hotel Rauhalahti, Kuopio, Finland, Oral) 
  5. Membrane Nanophotonic Platform for Enhanced Light-Matter Interaction of Transition Metal Dichalcogenide Monolayer
    Ya-Lun Ho, Chee Fai Fong, Yen-Ju Wu, Kuniaki Konishi, Jui-Han Fu, Yuichiro Kato, Vincent Tung, Chun-Wei Chen
    14th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META2024) (2024/7/18, Toyama International Conference Center, Toyama, Japan)
  6. Comparison of laser-processed terahertz metalenses with numerical simulation of measured focusing characteristics
    Yuki Hakamada, Mizuho Matoba, Haruyuki Sakurai, Kuniaki Konishi
    Optics & Photonics International Congress 2024 (OPIC2024) 2024/4/25, Minatomirai, Kanagawa, Japan)
  7. GHz burst pumped third-harmonic pulses for precise microfabrication of silicon
    Haruyuki Sakurai, Kuniaki Konishi
    SPIE Photonics West (2024/1/31, San Francisco, California, United States)
  8. Fabrication of THz metalens by ultraviolet femtosecond laser ablation
    Yuki Hakamada, Mizuho Matoba, Haruyuki Sakurai, Kuniaki Konishi
    SPIE Photonics West (2024/1/31, San Francisco, California, United States)
  9. Fabrication of functional hollow waveguide devices for electromagnetic waves in 200–400GHz band using UV-curable resin type 3D printer, RECILS
    Kentaro Soeda, Kazunori Naganuma, Yoshinori Yamaguchi, Kuniaki Konishi, Hiroharu Tamaru, Norikatsu Mio, Hiroshi Ito, Junji Yumoto
    SPIE Photonics West (2024/1/31, San Francisco, California, United States)

2023

  1. Lattice Type Dependence Of Transmittance Spectrum In Moth-eye Antireflective Structures
    Rikuo Koike, Shotaro Kawano, Haruyuki Sakurai, Kuniaki Konishi, Norikatsu Mio
    48th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2023) (2023/9/19, Montreal, Canada, Oral)
  2. SLA 3D printer, RECILS enables low-loss waveguide bandpass filters for electromagnetic waves in 200-400GHz band at low cost
    Kentaro Soeda, Kazunori Naganuma, Yoshinori Yamaguchi, Kuniaki Konishi, Hiroharu Tamaru, Norikatsu Mio, Hiroshi Ito, Junji Yumoto
    Conference on Lasers in Manufacturing (LiM) 2023　(2023/6/26, Munich, Germany, Oral)
  3. Comparison of ionization models in nonlinear propagation simulation in air for femtosecond laser ablation
    Ryohei Yamada, Wataru Komatsubara, Haruyuki Sakurai, Kuniaki Konishi, Norikatsu Mio, Junji Yumoto, Makoto Kuwata Gonokami
    The 24th International Symposium on Laser Precision Microfabrication (LPM2023) R3-S39-3 (2023/6/18, Hirosaki, Japan, Oral)
  4. Predicting algorithm for laser processing parameters using spectral-domain optical coherence tomography
    Masaki Hosoda, Daisuke Oida, Takumi Ishikawa, Haruyuki Sakurai, Kuniaki Konishi
    SPIE. Photonics West 2023, Paper 12414-13,( 2023/2/2, San Francisco, California, United States )

2022

  1. Time-Resolved Complex Optical-Field Imaging of Laser Ablation Dynamics
    Shotaro Kawano, Keiichiro Toda, Haruyuki Sakurai, Kuniaki Konishi, Takuro Ideguchi
    IEEE Photonics Conference
    ThG1.3 (2022/11/17, Vancouver, Canada, Oral)
  2. 3D-Printed Waveguide For 220GHz-325GHz Band
    Kentaro Soeda, Norikaza Naganuma, Kuniaki Konishi, Hiroharu Tamaru, Norikatsu Mio, Hiroshi Ito, Junji Yumoto
    47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) 2022, Tu-AM-3-4 (2022/8/31, Delft, The Netherland, Oral)
  3. Simulation Of Selective Excitation Of Dark Plasmon Modes In Single Metal Rods By Focused Terahertz Radial Beams
    Mizuho Matoba, Kuniaki Konishi, Norikatsu Mio, Junji Yumoto, Makoto Kuwata-Gonokami
    47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) 2022, Tu-AM-3-4 (2022/8/30, Delft, The Netherland, Oral)
  4. Modeling of Nonlinear Propagation of Femtosecond Laser Pulse in Air for Laser Ablation
    Ryohei Yamada, Wataru Komatsubara, Haruyuki Sakurai, Kuniaki Konishi, Norikatsu Mio, Junji Yumoto, Makoto Kuwata-Gonokami
    Conference on Lasers and Electro-Optics 2022 (CLEO 2022) (2022/5/19, Poster)
  5. Large diameter millimeter-wave low-pass filter made of alumina with laser ablated anti-reflection coating
    Ryota Takaku, Qi Wen, Scott Cray, Mark Devlin, Simon Dicker, Shaul Hanany, Takashi Hasebe, Teruhito Iida, Nobuhiko Katayama, Kuniaki Konishi, Makoto Kuwata-Gonokami, Tomtoake Matsumura, Norikatsu Mio, Haruyuki Sakurai, Yuki Sakurai, Ryohei Yamada, Junji Yumoto
    16th International Conference on Laser Ablation (COLA2021/2022) (2022/4/28, Shimane, Oral)

2021

  1. Evaluation of instrumental polarization of a 200 mm diameter achromatic HWP with anti-reflective structures and impact on TES non-linearity
    R. Takaku, T. Ghigna, S. Hanany, Y. Hoshino, H. Ishino, N. Katayama, K. Komatsu, K. Konishi, M. Kuwata-Gonokami, T. Matsumura, H. Sakurai, Y. Sakurai, Q. Wen, N. Y. Yamasaki, J. Yumoto
    19th International Workshop on Low Temperature Detectors (LTD19) (2021/7/29, Online, Poster)
  2. Direct Correlation of Local Fluence to Ablation Morphology Created by a Single Femtosecond Laser Pulse
    H. Sakurai, K. Konishi, H. Tamaru, J. Yumoto, M. Kuwata-Gonokami
    CLEO/EUROPE-EQEC 2021 (2021/6/25, Online, Poster)
  3. Time-Resolved Digital Holography System with High Phase Precision for Detail Observation in Laser Ablation Dynamics
    S. Kawano, M. Tamamitsu, H. Sakurai, K. Konishi, T. Ideguchi, J. Yumoto, M. Kuwata-Gonokami
    CLEO/EUROPE-EQEC 2021 (2021/6/25, Online, Oral)
  4. Changes in the Intensity Distribution of the Laser Pulse due to Non-linear Optical Interaction with Air and Its Effects on Laser Ablation
    R. Yamada, W. Komatsubara, H. Sakurai, K. Konishi, N. Mio, J. Yumoto, M. Kuwata-Gonokami
    CLEO/EUROPE-EQEC 2021 (2021/6/24, Online, Oral)
  5. Observation of Rotational Doppler Shift for Harmonic Generation in Solids
    W. Komatsubara, K. Konishi, J. Yumoto, M. Kuwata-Gonokami
    CLEO/EUROPE-EQEC 2021 (2021/6/24, Online, Oral)
  6. CIRCULARLY POLARIZED VACUUM ULTRAVIOLET COHERENT LIGHT GENERATION USING A SQUARE LATTICE PHOTONIC CRYSTAL NANOMEMBRANE
    Kuniaki Konishi, Daisuke Akai, Yoshio Mita, Makoto Ishida, Junji Yumoto, Makoto Kuwata-Gonokami
    The 21st International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS 2021) (2021/6/25, Online, Oral)
  7. RECILS: high resolution and high-speed SLA 3D printer using a plane building platform and a cylindrical glass window
    Kentaro Soeda, Hirosuke Suzuki, Shuichi Yokobori, Kuniaki Konishi, Hiroharu Tamaru, Norikatsu Mio, Makoto Kuwata-Gonokami, Junji Yumoto
    Lasers in Manufacturing 2021 (2021/6/22, Online, Oral)
  8. Plasma dynamics induced by single-pulse femtosecond laser ablation of dielectrics and metals
    Bruno Gonzalez-Izquierdo, Haruyuki Sakurai, Ryohei Yamada, Kuniaki Konishi, Makoto Kuwata-Gonokami, Junji Yumoto
    Lasers in Manufacturing 2021 (2021/6/22, Online, Oral)

Click here for a list of all presentations