Optical device with propagating and localized surface plasmons and detection apparatus
US9057697B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2012 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Aug 10, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical device includes a first protrusion group in which protrusions protruding from a conductor surface of a substrate are arranged in a first direction with a first period, a dielectric layer that covers the conductor surface and the first protrusion group, and a second protrusion group in which metal nanoparticles are arranged on the dielectric layer in the first direction with a second period different from the first period. When one of the first period and the second period is defined as Px1, the other of the first period and the second period is defined as Px2, and the wavelength of irradiation light is defined as λ, λ>Px1>Px2 and 0<Px1−Px2<Px1/2 are satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.