Hydrogen detecting surface plasmon resonator, surface plasmon resonance optical hydrogen detector and method for optically detecting hydrogen using surface plasmon resonance
US8675200B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 1, 2010 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Oct 25, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/554
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.