Abstract: There is provided is a transmitted light control device capable of controlling a peak wavelength and a peak intensity of transmitted light while keeping a sharp wavelength width. A transmitted light control device 10 includes: a grating substrate 1; a metal thin film 2; a conducting polymer layer 3 made by depositing a conducting polymer on the metal thin film 2; a cell 4 filled with a liquid medium 5 composed of an electrolyte or a buffer solution and configured such that a part of the liquid medium 5 is in contact with the conducting polymer layer 3; and a metal thin film potential control means 6 having a working electrode W connected to the metal thin film 2 and having a counter electrode C and a reference electrode R each connected to the liquid medium 5. The substrate 1 and at least a part of the cell 4 are made of a light transmitting material.

Abstract: 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.

Abstract: 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.

Abstract: 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 4, a core 5, and a thin film 7 for detecting an adsorbed substance are sequentially stacked on a crystal oscillator 10 to constitute an optical waveguide layer 12 and a gas adsorption member 11. An incoming light prism 8 and an outgoing light prism 9 are provided on the surface of the core 5. 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 10, both caused by adsorption of the target substance on the core surface.

Abstract: 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 4, a core 5, and a thin film 7 for detecting an adsorbed substance are sequentially stacked on a crystal oscillator 10 to constitute an optical waveguide layer 12 and a gas adsorption member 11. An incoming light prism 8 and an outgoing light prism 9 are provided on the surface of the core 5. 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 10, both caused by adsorption of the target substance on the core surface.

Abstract: The invention provides a gas detection method and a gas sensor which utilize an amount of change in the electrical characteristic of a gas sensitive thin film with respect to the adsorption amount of a gas to be detected. The gas sensitive thin film (7) having characteristic detection electrodes (5, 6) functioning as a sandwich electrode or a gap electrode is laid out on a crystal resonator (10), and change in the electrical characteristic of the gas sensitive thin film (7) with respect to the adsorption amount of the detection target gas is observed by simultaneously determining change in the oscillatory frequency of the crystal resonator (10) and the electrical characteristic of the gas sensitive thin film (7). Because the sensor is an integral type device, both changes in an adsorption mass and the electrical characteristic can be surely monitored.