Kiyotaka Sasagawa
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Ultrafast all-optical switching by cross-absorption modulation in silicon wire waveguides
TK Liang, LR Nunes, T Sakamoto, K Sasagawa, T Kawanishi, M Tsuchiya, ...
Optics Express 13 (19), 7298-7303, 2005
Implantable CMOS biomedical devices
J Ohta, T Tokuda, K Sasagawa, T Noda
Sensors 9 (11), 9073-9093, 2009
Highly efficient third harmonic generation in a periodically poled MgO: LiNbO3 disk resonator
K Sasagawa, M Tsuchiya
Applied Physics Express 2 (12), 122401, 2009
CMOS-based multichip networked flexible retinal stimulator designed for image-based retinal prosthesis
T Tokuda, K Hiyama, S Sawamura, K Sasagawa, Y Terasawa, K Nishida, ...
IEEE transactions on electron devices 56 (11), 2577-2585, 2009
Live electrooptic imaging system based on ultraparallel photonic heterodyne for microwave near-fields
K Sasagawa, A Kanno, T Kawanishi, M Tsuchiya
IEEE transactions on microwave theory and techniques 55 (12), 2782-2791, 2007
Polarisation-analysing CMOS photosensor with monolithically embedded wire grid polariser
T Tokuda, S Sato, H Yamada, K Sasagawa, J Ohta
Electronics letters 45 (4), 1, 2009
Image sensor pixel with on-chip high extinction ratio polarizer based on 65-nm standard CMOS technology
K Sasagawa, S Shishido, K Ando, H Matsuoka, T Noda, T Tokuda, ...
Optics express 21 (9), 11132-11140, 2013
An implantable CMOS device for blood-flow imaging during experiments on freely moving rats
M Haruta, C Kitsumoto, Y Sunaga, H Takehara, T Noda, K Sasagawa, ...
Japanese Journal of Applied Physics 53 (4S), 04EL05, 2014
S-band Tm3+-doped tellurite glass microsphere laser via a cascade process
K Sasagawa, Z Yonezawa, R Iwai, J Ohta, M Nunoshita
Applied physics letters 85 (19), 4325-4327, 2004
Implantable microimaging device for observing brain activities of rodents
J Ohta, Y Ohta, H Takehara, T Noda, K Sasagawa, T Tokuda, M Haruta, ...
Proceedings of the IEEE 105 (1), 158-166, 2016
Polarization-analyzing CMOS image sensor with monolithically embedded polarizer for microchemistry systems
T Tokuda, H Yamada, K Sasagawa, J Ohta
IEEE Transactions on biomedical circuits and systems 3 (5), 259-266, 2009
Highly sensitive lens-free fluorescence imaging device enabled by a complementary combination of interference and absorption filters
K Sasagawa, A Kimura, M Haruta, T Noda, T Tokuda, J Ohta
Biomedical optics express 9 (9), 4329-4344, 2018
CMOS image sensor-based implantable glucose sensor using glucose-responsive fluorescent hydrogel
T Tokuda, M Takahashi, K Uejima, K Masuda, T Kawamura, Y Ohta, ...
Biomedical optics express 5 (11), 3859-3870, 2014
1 mm3-sized optical neural stimulator based on CMOS integrated photovoltaic power receiver
T Tokuda, T Ishizu, W Nattakarn, M Haruta, T Noda, K Sasagawa, ...
AIP advances 8 (4), 2018
Development of complementary metal oxide semiconductor imaging devices for detecting green fluorescent protein in the deep brain of a freely moving mouse
A Tagawa, A Higuchi, T Sugiyama, K Sasagawa, T Tokuda, H Tamura, ...
Japanese Journal of Applied Physics 48 (4S), 04C195, 2009
Real-time monitoring system of RF near-field distribution images on the basis of 64-channel parallel electro-optic data acquisition
K Sasagawa, M Tsuchiya
IEICE Electronics Express 2 (24), 600-606, 2005
Novel implantable imaging system for enabling simultaneous multiplanar and multipoint analysis for fluorescence potentiometry in the visual cortex
T Kobayashi, M Motoyama, H Masuda, Y Ohta, M Haruta, T Noda, ...
Biosensors and Bioelectronics 38 (1), 321-330, 2012
An implantable CMOS image sensor with self-reset pixels for functional brain imaging
K Sasagawa, T Yamaguchi, M Haruta, Y Sunaga, H Takehara, ...
IEEE Transactions on Electron Devices 63 (1), 215-222, 2016
Development and in vivo demonstration of CMOS-based multichip retinal stimulator with simultaneous multisite stimulation capability
T Tokuda, Y Takeuchi, Y Sagawa, T Noda, K Sasagawa, K Nishida, ...
IEEE Transactions on Biomedical Circuits and Systems 4 (6), 445-453, 2010
CMOS on-chip bio-imaging sensor with integrated micro light source array for optogenetics
T Tokuda, H Kimura, T Miyatani, Y Maezawa, T Kobayashi, T Noda, ...
Electronics letters 48 (6), 1, 2012
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