The University of Tokyo

Olympus Corporation

Omron Corporation

Kyushu University

Tetsuo Kan

Kiyoshi Matsumoto

Isao Shimoyama

Hidetoshi Takahashi

Chihaya Adachi

Yusuke Takei

Yasuo Sasaki

Koichi Karaki

Tomoyuki Takahata

Minh-Dung Nguyen

Masahito Honda

Yoshiharu Ajiki

Masayuki Yahiro

Akiko Hamada

Koutaro Ishizu

Kenta Kuwana

Provided is a photodetector including: an organic semiconductor () having protrusions; a metal layer () added onto the organic semiconductor (), for promoting at least one of localized plasmon resonance and surface plasmon resonance in which electrons are excited through irradiation of detection light; and a semiconductor () forming a junction with the metal layer (), for allowing electrons excited through the plasmon resonance to pass through the junction () with the metal layer ().

Photodetector

A gas sensor is proposed, which can detect a gas by a novel configuration while reduction in size is achieved. The gas sensor () does not need a light absorption path as in a prior art so that the size can be reduced correspondingly. Further, in the gas sensor (), a gas is absorbed in an ionic liquid (IL), and a dielectric constant of the ionic liquid (IL) that changes by absorbing the gas can be measured according to a change in light intensity that occurs by a surface plasmon resonance phenomenon in a metal layer (). Thus, the gas sensor () including the novel configuration that can detect a gas based on the change in the light intensity can be realized.

Gas sensor

There is provided a differential pressure sensor capable of measuring a pressure fluctuation with a simple structure. The differential pressure sensor includes a main body formed with an air chamber, and an opening that causes an interior of the air chamber to be in communication with an exterior, and a detector provided at the opening. The detector includes a cantilever provided in a manner tiltable so as to block off the opening, and the cantilever is formed with a Piezo resistor layer.

Differential pressure sensor

Growing community of inventors

Tokyo, Japan

Tetsuo Kan