Niigata University

Hitachi Chemical Company, Ltd.

Yasuo Ohdaira

Futao Kaneko

Takahiro Kawakami

Keizo Kato

Kazunari Shinbo

Nobuo Miyadera

Akira Baba

Kenta Mizusawa

Provided is an SPR sensor which can achieve compaction and multichannel detection by simple configuration at a low cost. The SPR sensor comprises an optical path, and detection areas on the side surface thereof formed by laminating metal layers formed to cause surface plasmon resonance phenomenon. The SPR sensor is characterized in that two or more detection areas are formed for one optical path, a dielectric constant regulation layer is further laminated in at least one of the two or more detection areas, dielectric constant is regulated to have a different surface plasmon resonance in each detection area, and a dielectric constant regulation layer laminated in the at least one of the two or more detection areas functions as a layer exhibiting sensitivity to an object to be detected.

SPR sensor

A substance adsorption detection method and a sensor utilizing amounts of change in the optical characteristic of a sensitive thin film with respect to the adsorbed amount of a substance to be detected. A clad, a core, and a thin filmfor detecting an adsorbed substance are sequentially stacked on a crystal oscillatorto constitute an optical waveguide layerand a gas adsorption member. An incoming light prismand an outgoing light prismare provided on the surface of the core. Changes in the adsorbed mass of the target substance and in the optical characteristic involved can be detected accurately and simultaneously by utilizing a change in outgoing light originating from a change in propagation loss and a change in the oscillation characteristic of the oscillator, both caused by adsorption of the target substance on the core surface.

Crystal oscillator sensor and substance adsorption detection method using the sensor

Growing community of inventors

Niigata, Japan

Yasuo Ohdaira