SPR sensor cell and SPR sensor

• US 9,470,631 B2
• Filed: 05/16/2013
• Issued: 10/18/2016
• Est. Priority Date: 06/01/2012
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Kontani, Tomohiro
• Primary Examiner(s): PEACE, RHONDA S
• Application Number:
  US14/401,824
• Publication Number:
  US 20150147021A1
• Time in Patent Office: 1,251 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G01N 21/17 Systems in which incident light is modified in accordance with the properties of the material investigated where the material investigated is optically excited causing a change in wavelength of the incident light G01N21/63
• CPC Class Codes: G01N 21/553 and using surface plasmons fluorescence excitation G01N21/648; enhanced Raman G01N21/658
• CPC Class Codes: G02B 6/10 of the optical waveguide type G02B6/02, G02B6/24 take precedence; devices or arrangements for the control of light by electric, magnetic, electro-magnetic or acoustic means G02F1/00; transferring the modulation of modulated light G02F2/00; optical logic elements G02F3/00; optical analogue/digital converters G02F7/00

Abstract

There are provided an SPR sensor cell and an SPR sensor having a very excellent detection sensitivity. The SPR sensor cell of the present invention includes: an under-cladding layer; a core layer formed so that at least a part of the core layer is adjacent to the under-cladding layer and having a light entrance and a light exit; and a metal layer covering a part of the core layer. A sectional area (S1) of the core layer at the light entrance and a sectional area (S2) of the core layer at the part covered by the metal layer satisfy a relationship of S1>S2.

Claims

1. An SPR sensor cell, comprising:

an under-cladding layer;

a core layer formed so that at least a part of the core layer is adjacent to the under-cladding layer and having a light entrance and a light exit; and

a metal layer covering a predetermined length of the core layer,

wherein a sectional area (S1) of the core layer at the light entrance and a sectional area (S2) of the core layer at the predetermined length covered by the metal layer satisfy a relationship of S1×

0.5≧

S2, and

a sectional shape and area of the core layer at the sectional area (S2) covered by the metal layer is constant across the predetermined length of the core layer.

2. An SPR sensor cell according to claim 1, wherein a thickness of the core layer across the sectional area (S2) covered by the metal layer is 25 μ

m or less.

3. An SPR sensor cell according to claim 1, wherein a thickness of the core layer at the light entrance of the sectional area (S1) is 50 μ

m or more.

4. An SPR sensor cell according to claim 1, wherein a width of the core layer at the light entrance of the sectional area (S1) is 50 μ

m or more.

5. An SPR sensor, comprising the SPR sensor cell according to claim 1.