Low On-Voltage Operation AlGaN/GaN Schottky Barrier Diode with a Dual Schottky Structure. - Seikoh Yoshida; Nariaki Ikeda; Jiang Li; Takahiro Wada; Hironari Takehara (IEICE Trans. Electron., 2005)

Demonstration of implantable CMOS image sensors for functional brain imaging. - Kiyotaka Sasagawa; Yoshinori Sunaga; Makito Haruta; Takahiro Yamaguchi; Hironari Takehara; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2014)

An implantable image sensor with self-reset function for brain imaging. - Kiyotaka Sasagawa; Takahiro Yamaguchi; Makito Haruta; Yoshinori Sunaga; Hironari Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2014)

High coupling efficiency contact imaging system having micro light pipe array for a digital enzyme-linked immunosorbent assay. - Hironari Takehara; Mizuki Nagasaki; Kiyotaka Sasagawa; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda; Hiroyuki Noji; Jun Ohta (BioCAS, 2015)

Compact lensless digital counting system for fluorescent micro-reaction-chamber array. - Hironari Takehara; Yuta Nakamoto; Kiyotaka Sasagawa; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2016)

On-chip fluorescence detection system with high-density microchamber array based on CMOS image sensor. - Jun Ohta; Hironari Takehara; Kiyotaka Sasagawa; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda (ISCAS, 2016)

In Vitro Long-Term Performance Evaluation and Improvement in the Response Time of CMOS-Based Implantable Glucose Sensors. - Takashi Tokuda; Toshikazu Kawamura; Keita Masuda; Tomohiro Hirai; Hironari Takehara; Yasumi Ohta; Mayumi Motoyama; Hiroaki Takehara; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta; Teru Okitsu; et al. (IEEE Des. Test, 2016)

Compact Lensless Fluorescence Counting System for Single Molecular Assay. - Hironari Takehara; Yuta Nakamoto; Narihito Ikeda; Kiyotaka Sasagawa; Makito Haruta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (IEEE Trans. Biomed. Circuits Syst., 2018)

Multispectral Near-infrared Imaging Technologies for Nonmydriatic Fundus Camera. - Hironari Takehara; Hirofumi Sumi; Wang Ze; Takahiro Kondo; Makito Haruta; Kiyotaka Sasagawa; Jun Ohta (BioCAS, 2019)

Miniaturized CMOS imaging device for implantable applications. - Kiyotaka Sasagawa; Makito Haruta; Yasumi Ohta; Hironari Takehara; Jun Ohta (VLSI-DAT, 2020)

Implantable CMOS image sensor with a neural amplifier for simultaneous recording of optical and electrophysiological signals. - Kenji Sugie; Kiyotaka Sasagawa; Yasumi Ohta; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (BioCAS, 2021)

Advanced Multi-NIR Spectral Image Sensor with Optimized Vision Sensing System and Its Impact on Innovative Applications. - Hirofumi Sumi; Hironari Takehara; Jun Ohta; Masatoshi Ishikawa (VLSI Circuits, 2021)

Micro-LED Array-Based Photo-Stimulation Devices for Optogenetics in Rat and Macaque Monkey Brains. - Yasumi Ohta; Mark Christian Guinto; Takashi Tokuda; Mamiko Kawahara; Makito Haruta; Hironari Takehara; Hiroyuki Tashiro; Kiyotaka Sasagawa; Hirotaka Onoe; Reona Yamaguchi; Yoshinori Koshimizu; Kaoru Isa; et al. (IEEE Access, 2021)

Development of Compact Readout Device for Neural Observation System using Fluorescence Imaging and Fast-scan Cyclic Voltammetry. - Ronnakorn Siwadamrongpong; Nicha Sato; Kenji Sugie; Yasumi Ohta; Makito Haruta; Hironari Takehara; Hiroyuki Tashiro; Kiyotaka Sasagawa; Jun Ohta (EMBC, 2022)

Mouse Brain Imaging Using a Self-Reset CMOS Image Sensor over 70-dB SNR. - Kiyotaka Sasagawa; Pakpuwadon Thanet; Mark Christian Guinto; Yasumi Ohta; Makito Haruta; Hironari Takehara; Hiroyuki Tashiro; Jun Ohta (MWSCAS, 2022)

Clear Fundus Images Through High-Speed Tracking Using Glare-Free IR Color Technology. - Motoshi Sobue; Hirokazu Takata; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Kiyotaka Sasagawa; Ryo Kawasaki; Jun Ohta (J. Robotics Mechatronics, 2022)

Front-light Structure for a Lensless Fluorescence Imaging Device with a Hybrid Emission Filter. - Kiyotaka Sasagawa; Yuki Ito; Daniel Schaeffer; Yoshinori Sunaga; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (BioCAS, 2023)

Thin and Scalable Hybrid Emission Filter via Plasma Etching for Low-Invasive Fluorescence Detection. - Erus Rustami; Kiyotaka Sasagawa; Kenji Sugie; Yasumi Ohta; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (Sensors, 2023)

Charge-Pump-Circuit Implementation for Increasing Sink Current in Low-Volage CMOS Retinal-Prosthesis Chips. - Wisaroot Sriitsaranusorn; Yuki Nakanishi; Takaya Hattori; Kuang-Chih Tso; Kenzo Shodo; Hironari Takehara; Yoshinori Sunaga; Makito Haruta; Hiroyuki Tashiro; Yasuo Terasawa; Jun Ohta; Kiyotaka Sasagawa (APCCAS, 2024)

Effects of Excitation Light Polarization with FrontLight Structure on Lensless Fluorescence Imaging. - Arphorn Promking; Kiyotaka Sasagawa; Yoshinori Sunaga; Yasumi Ohta; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (BioCAS, 2024)

Exposure Time Control Method for Higher Intermediate Frequency in Optical Heterodyne Imaging and Its Application to Electric-Field Imaging Based on Electro-Optic Effect. - Kiyotaka Sasagawa; Ryoma Okada; Yoshihiro Akamatsu; Maya Mizuno; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (Sensors, 2024)

Millimeter-Wave Band Electro-Optical Imaging System Using Polarization CMOS Image Sensor and Amplified Optical Local Oscillator Source. - Ryoma Okada; Maya Mizuno; Tomoaki Nagaoka; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta; Kiyotaka Sasagawa (Sensors, 2024)

Microwave electro-optical imaging system using a frequency tracking optical local oscillator source with a polarization CMOS image sensor. - Ryoma Okada; Maya Mizuno; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta; Kiyotaka Sasagawa (IEICE Electron. Express, 2025)