Optical device with propagating and localized surface plasmons and detection apparatus

Patent metadata

Field	Value
Publication number	US-9057697-B2
Application number	US-201213651791-A
Country	US
Kind code	B2
Filing date	Oct 15, 2012
Priority date	Oct 17, 2011
Publication date	Jun 16, 2015
Grant date	Jun 16, 2015

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 Px 1 , the other of the first period and the second period is defined as Px 2 , and the wavelength of irradiation light is defined as λ, λ>Px 1 >Px 2 and 0<Px 1 −Px 2 <Px 1 /2 are satisfied.

First claim

What is claimed is:

1. A detection apparatus comprising:
a light source;
an optical device that emits light specific to a sample by introduction of the sample and irradiation with light of a wavelength λ from the light source; and
an optical detection unit that detects the light specific to the sample emitted from the optical device,
wherein the optical device includes
a first protrusion group in which protrusions protruding from a conductor surface of a substrate are arran…

Assignees

• Seiko Epson Corp

Inventors

• Amako Jun
• Sugimoto Mamoru
• Koike Hideaki

Classifications

• G02B27/60

  Physics · mapped topic

• G01J3/12

  Physics · mapped topic

• G01N21/554 Primary

  Physics · mapped topic

• G01J3/26

  Physics · mapped topic