Publications
Preprint
Label-free mid-infrared photothermal microscopy revisits intracellular thermal dynamics: what do fluorescent nanothermometers measure?
Keiichiro Toda, Masaharu Takarada, Genki Ishigane, Hiroyuki Shimada, Venkata Ramaiah Badarla, Kohki Okabe, Takuro Ideguchi
2024
Broadband coherent Raman scattering spectroscopy at 50,000,000 spectra/s
Takuma Nakamura, Kazuki Hashimoto, Takuro Ideguchi
Ultrafast Science 4, 0076 (2024)
Compressive time-stretch spectroscopy with pulse-by-pulse intensity modulation
Akira Kawai, Ryoichi Horisaki, and Takuro Ideguchi
Optics Letters 49, 3468-3471 (2024)
Mid-infrared optical coherence tomography with MHz axial line rate for real-time non-destructive testing
Satoko Yagi, Takuma Nakamura, Kazuki Hashimoto, Shotaro Kawano, Takuro Ideguchi
APL Photonics 9, 051301 (2024)
Mid-infrared wide-field nanoscopy
Miu Tamamitsu, Keiichiro Toda, Masato Fukushima, Venkata Ramaiah Badarla, Hiroyuki Shimada, Sadao Ota, Kuniaki Konishi, Takuro Ideguchi
Nature Photonics 18, 738–743 (2024) Press release
Single-image phase retrieval for off-the-shelf Zernike phase-contrast microscopes
Rikimaru Kurata*, Keiichiro Toda*, Genki Ishigane, Makoto Naruse, Ryoichi Horisaki, and Takuro Ideguchi
Optics Express 32, 2202-2211 (2024)
2023
Label-free mid-infrared photothermal live-cell imaging beyond video rate
Genki Ishigane*, Keiichiro Toda*, Miu Tamamitsu, Hiroyuki Shimada, Venkata Ramaiah Badarla, Takuro Ideguchi
Light: Science & Applications 12, 174 (2023) Press release
Thermo-optical measurements using quantitative phase microscopy
Nicholaus Kevin Tanjaya, Keiichiro Toda, Takuro Ideguchi, and Satoshi Ishii
Optics Letters 48, 3311-3314 (2023)
Upconversion time-stretch infrared spectroscopy
Kazuki Hashimoto, Takuma Nakamura, Takahiro Kageyama, Venkata Ramaiah Badarla, Hiroyuki Shimada, Ryoich Horisaki, Takuro Ideguchi
Light: Science & Applications 12, 48 (2023)
2022
Simple approach to broadband mid-infrared pulse generation with a mode-locked Yb-doped fiber laser
Takuma Nakamura, Venkata Ramaiah Badarla, Kazuki Hashimoto, Peter G. Schunemann, Takuro Ideguchi
Optics Letters 47, 1790-1793 (2022)
2021
Broadband complementary vibrational spectroscopy with cascaded intra-pulse difference frequency generation
Kazuki Hashimoto, Venkata Ramaiah Badarla, Takayuki Imamura, Takuro Ideguchi
Optics Letters 46, 5517-5520 (2021)
Graphene photodetectors with asymmetric device structures on silicon chips
Kenta Shimomura, Kaname Imai, Kenta Nakagawa, Akira Kawai, Kazuki Hashimoto, Takuro Ideguchi, Hideyuki Maki
Carbon Trends 5, 100100 (2021)
Compressive dual-comb spectroscopy
Akira Kawai, Takahiro Kageyama, Ryoichi Horisaki, Takuro Ideguchi
Scientific Reports 11, 13494 (2021)
Adaptive dynamic range shift (ADRIFT) quantitative phase imaging
Keiichiro Toda, Miu Tamamitsu, Takuro Ideguchi
Light: Science & Applications 10, 1 (2021), UTokyoFOCUS
High-speed Fourier-transform infrared spectroscopy with phase-controlled delay line
Kazuki Hashimoto, Venkata Ramaiah Badarla, Takuro Ideguchi
Laser & Photonics Reviews 15, 2000374 (2021)
2020
Time-stretch infrared spectroscopy
Akira Kawai, Kazuki Hashimoto, Tatsuo Dougakiuchi, Venkata Ramaiah Badarla, Takayuki Imamura, Tadataka Edamura, Takuro Ideguchi
Communications Physics 3, 152 (2020), UTokyoFOCUS
A multimodal laser-scanning nonlinear optical microscope with a rapid broadband Fourier-transform coherent Raman modality
Faris Sinjab, Kazuki Hashimoto, Venktata Ramaiah Badarla, Junko Omachi, Takuro Ideguchi
Optics Express 28, 20794-20807 (2020) Image of the week in OSA publisheing
Spatiotemporal monitoring of intracellular metabolic dynamics by resonance Raman microscopy with isotope labeling
Yusuke Yonamine, Kotaro Hiramatsu, Takuro Ideguchi, Takuro Ito, Tomomi Fujiwara, Yoshiko Miura, Keisuke Goda and Yu Hoshino
RSC Adv. 10, 16679-16686 (2020)
Label-free biochemical quantitative phase imaging with mid-infrared photothermal effect
Miu Tamamitsu, Keiichiro Toda, Hiroyuki Shimada, Takaaki Honda, Masaharu Takarada, Kohki Okabe, Yu Nagashima, Ryoichi Horisaki, Takuro Ideguchi
Optica 7, 359-366 (2020), UTokyoFOCUS
Enhanced spectral resolution for broadband coherent anti-Stokes Raman spectroscopy
Faris Sinjab, Kazuki Hashimoto, Xuanqiang Zhao, Yu Nagashima, Takuro Ideguchi
Optics Letters 45, 1515-1518 (2020) Editor's pick
Bioimaging by molecular-vibration-sensitive quantitative phase microscopy based on wide-field mid-infrared photothermal excitation
Miu Tamamitsu, Keiichiro Toda, Yu Nagashima, Ryoichi Horisaki, Takuro Ideguchi
2019
Complementary Vibrational Spectroscopy
Kazuki Hashimoto, Venkata Ramaiah Badarla, Akira Kawai, Takuro Ideguchi
Nature Communications 10, 4411 (2019), UTokyoFOCUS
Quantitative phase imaging with molecular vibrational sensitivity
Miu Tamamitsu, Keiichiro Toda, Ryoichi Horisaki and Takuro Ideguchi
Optics Letters 44, 3729-3732 (2019) Editors' Pick
Molecular contrast on phase-contrast microscope
Keiichiro Toda*, Miu Tamamitsu*, Ryoichi Horisaki and Takuro Ideguchi
Scientific Reports 9, 9957 (2019), UTokyo FOCUS
High‐speed broadband Fourier‐transform coherent anti‐stokes Raman scattering spectral microscopy
Ryo Kinegawa, Kotaro Hiramatsu, Kazuki Hashimoto, Venkata Ramaiah Badarla, Takuro Ideguchi, Keisuke Goda
Journal of Raman Spectroscopy 50, 1141-1146 (2019)
High-throughput label-free molecular fingerprinting flow cytometry
Kotaro Hiramatsu*, Takuro Ideguchi*, Yusuke Yonamine, SangWook Lee, Yizhi Luo, Kazuki Hashimoto, Takuro Ito, Misa Hase, Jee-Woong Park, Yusuke Kasai, Shinya Sakuma, Takeshi Hayakawa, Fumihito Arai, Yu Hoshino and Keisuke Goda
Science Advances 5, aau0241 (2019)
2018
Phase-controlled Fourier-transform spectroscopy
Kazuki Hashimoto and Takuro Ideguchi
Nature Communications 9, 4448 (2018)
Microfluidic single-particle chemical analyzer with dual-comb coherent Raman spectroscopy
Takuro Ideguchi, Tasuku Nakamura, Shigekazu Takizawa, Miu Tamamitsu, Sangwook Lee, Kotaro Hiramatsu, Venkata Ramaiah Badarla, Jee-Woong Park, Yusuke Kasai, Takeshi Hayakawa, Shinya Sakuma, Fumihiko Arai and Keisuke Goda
Optics Letters 43, 4057-4060 (2018)
Ultra-broadband rapid-scan Fourier-transform CARS spectroscopy with sub-10-fs optical pulses
Kazuki Hashimoto, Junko Omachi, and Takuro Ideguchi
Optics Express 26, 14307-14314 (2018)
2017
Rapid-scan Fourier-transform coherent anti-Stokes Raman scattering spectroscopy with heterodyne detection
Kotaro Hiramatsu, Yizhi Luo, Takuro Ideguchi, and Keisuke Goda
Optics Letters 42, 4335-4338 (2017)
Ultrafast broadband Fourier-transform CARS spectroscopy at 50,000 spectra/s enabled by a scanning Fourier-domain delay line
Miu Tamamitsu, Yusuke Sakaki, Tasuku Nakamura, G. Krishna Podagatlapalli, Takuro Ideguchi, and Keisuke Goda
Vibrational Spectroscopy 91, 163-169 (2017)
Dual-Comb Spectroscopy
Takuro Ideguchi
Optics and Photonics News 28, 32-39 (2017)
Ultrafast broadband Fourier-transform CARS spectroscopy operating at 50,000 spectra/second
Miu Tamamitsu, Yusuke Sakaki, Tasuku Nakamura, G. Krishna Podagatlapalli, Takuro Ideguchi, Keisuke Goda
2016
Kerr-lens mode-locked bidirectional dual-comb ring laser for broadband dual-comb spectroscopy
Takuro Ideguchi, Tasuku Nakamura, Yohei Kobayashi, Keisuke Goda
Nonlinear optical interactions in silicon waveguides
B. Kuyken, F. Leo, S. Clemmen, U. Dave, R. Van Laer, T. Ideguchi, H. Zhao, X. Liu, J. Safioui, S. Coen, S.P. Gorza, S. K. Selvaraja, S. Massar, R. M. Osgood Jr., P. Verheyen, J. Van Campenhout, R. Baets, W.M. J. Green, and G. Roelkens
Broadband coherent Raman spectroscopy running at 24,000 spectra per second
Kazuki Hashimoto, Megumi Takahashi, Takuro Ideguchi, Keisuke Goda
Scientific Reports 6, 21036 (2016)
High-throughput time-stretch microscopy with morphological and chemical specificity
Cheng Lei, Masashi Ugawa, Taisuke Nozawa, Takuro Ideguchi, Dino Di Carlo, Sadao Ota, Yasuyuki Ozeki, and Keisuke Goda