US 9,535,003 B2Granted

SPR sensor cell and SPR sensor

AssigneeNitto Denko Corporation

InventorsHajime Nishio, Tomohiro Kontani

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Abstract

There are provided an SPR sensor cell and sensor, both having very excellent detection sensitivity. The SPR sensor cell includes: an under-cladding layer; a core layer, at least a part of the core layer being adjacent to the under-cladding layer; and a metal layer covering the core layer. The core layer includes a uniform layer and a gradient layer arranged between the uniform layer and the under-cladding layer; a refractive index NCO of the uniform layer satisfies a relationship of 1.34≦NCO<1.44; a refractive index NCL of the under-cladding layer and the refractive index NCO of the uniform layer satisfy a relationship of NCO−NCL≧0.020; and a refractive index of the gradient layer gradually increases from an under-cladding layer side to a uniform layer side in a thickness direction of the gradient layer within a range of from more than the NCL to less than the NCO.

Claims6

Dependent claims

An SPR sensor cell, comprising:

an under-cladding layer having a constant refractive index of NCL;
a core layer, at least a part of the core layer being adjacent to the under-cladding layer;
and
a metal layer covering the core layer,
wherein:
the core layer includes a uniform layer and a gradient layer arranged between the uniform layer and the under-cladding layer;
a refractive index NCO of the uniform layer is substantially uniform throughout the uniform layer, the refractive index NCO being a value greater than or equal to 1.34 and less than 1.44;
a first interface region between the gradient layer and the uniform layer has a refractive index of NCO;
a second interface region between the gradient layer and the under-cladding layer has a refractive index of NCL;
a refractive index of the gradient layer increases from the second interface region to the first interface region in a thickness direction of the gradient layer from NCL to NCO, a difference between NCO and NCL, being equal to or greater than 0.020.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/426,376Filed 30 Aug 2013
Priority: JP 2012-1971787 Sep 2012
Published: US 2015/0260649 A117 Sep 2015
Granted: 3 Jan 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G01N 21/553
Attenuated total reflection: and using surface plasmons
G01N 21/03
Arrangements or apparatus for facilitating the optical investigation: cuvette constructions
G02B 6/10
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings: of the optical waveguide type
G02B 6/1226
Basic optical elements, e.g. light-guiding paths: involving surface plasmon interaction