M
Masahito Yamanaka
Researcher at Nagoya University
Publications - 84
Citations - 1156
Masahito Yamanaka is an academic researcher from Nagoya University. The author has contributed to research in topics: Supercontinuum & Optical coherence tomography. The author has an hindex of 16, co-authored 84 publications receiving 1006 citations. Previous affiliations of Masahito Yamanaka include Osaka University.
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Journal ArticleDOI
High-Resolution Confocal Microscopy by Saturated Excitation of Fluorescence
TL;DR: Theoretical and experimental investigations show that the demodulated fluorescence signal is nonlinearly proportional to the excitation intensity and contributes to improve the spatial resolution in three dimensions beyond the diffraction limit of light.
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Measurement of a Saturated Emission of Optical Radiation from Gold Nanoparticles: Application to an Ultrahigh Resolution Microscope
Shi-Wei Chu,Tung-Yu Su,Ryosuke Oketani,Yen Ta Huang,H. y. Wu,Yasuo Yonemaru,Masahito Yamanaka,Hsuan Lee,Guan Yu Zhuo,Ming Ying Lee,Satoshi Kawata,Katsumasa Fujita +11 more
TL;DR: By extracting the saturated part of scattering via temporal modulation, this work achieves λ/8 point spread function in far-field imaging with unambiguous separation of adjacent particles.
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Introduction to super-resolution microscopy.
TL;DR: The principles of spatial resolution improvement in super-resolution microscopies that were recently developed that utilize the interaction of light and fluorescent probes in order to break the diffraction barrier that limits spatial resolution are introduced.
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A fast- and positively photoswitchable fluorescent protein for ultralow-laser-power RESOLFT nanoscopy
Dhermendra K. Tiwari,Yoshiyuki Arai,Masahito Yamanaka,Tomoki Matsuda,Masakazu Agetsuma,Masahiro Nakano,Katsumasa Fujita,Takeharu Nagai +7 more
TL;DR: Kinoor is described, a fast-switching, positively photoswitchable fluorescent protein, and it is shown that it has high photostability over many switching repeats, and super-resolution imaging of live HeLa cells is achieved using biocompatible, ultralow laser intensity.
Journal ArticleDOI
Saturation and Reverse Saturation of Scattering in a Single Plasmonic Nanoparticle
Shi-Wei Chu,H. y. Wu,Yen Ta Huang,Tung-Yu Su,Hsuan Lee,Yasuo Yonemaru,Masahito Yamanaka,Ryosuke Oketani,Satoshi Kawata,Satoru Shoji,Katsumasa Fujita +10 more
TL;DR: In this article, the authors show that backscattering from an isolated gold nanoparticle exhibits not only saturation but also reverse saturation, and they further reveal that nonlinear scattering is dominated by surface plasmon resonance (SPR) and shares a similar physical origin with nonlinear absorption.