The University of Tokyo

Fuji Electric Co., Ltd.

Japan Aviation Electronics Industry, Limited

Jean-Jacques Delaunay

Atsushi Suda

Takuya Suzuki

Ichiro Yamada

Fumi Ui

Etsuo Maeda

A gas sensor having a heater layer; and a gas detector that is heated by the heater layer to detect a measurement target gas. The gas detector has a gas sensing layer, a diffusion layer that covers a surface of the gas sensing layer, and an absorption layer that covers a surface of the diffusion layer. The absorption layer has greater absorption of the measurement target gas than the diffusion layer, and the diffusion layer has greater diffusion of the measurement target gas than the absorption layer.

Gas sensor

Light from light source means (a wavelength-variable laser) is applied to a surface of a hydrogen absorbing thin metal film of a hydrogen detecting surface plasmon resonator including a surface plasmon resonance enhancement structure formed by providing in the thin film an array of periodic holes having a shape that is not 90-degree rotational symmetric in the plane of the film surface, and transmitted light is detected with light detecting means (a photometer). Hydrogen is detected on the basis of a change in light transmission frequency characteristic caused by hydrogen absorption in the hydrogen detecting surface plasmon resonator. Optical hydrogen detection that is highly safe and unaffected by variations in the amount of light from the light source and stray light can be achieved.

Hydrogen detecting surface plasmon resonator, surface plasmon resonance optical hydrogen detector and method for optically detecting hydrogen using surface plasmon resonance

Growing community of inventors

Tokyo, Japan

Jean-Jacques Delaunay