# US 2010/0165334 A1 · Spectroscopic device and raman spectroscopic system

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- Number: US 2010/0165334 A1
- Document ID: US20100165334A1
- Status: Published application
- Kind: A1
- Application number: 12/303,785
- Filed: 2007-06-07
- Published: 2010-07-01
- Earliest claimed: 2006-06-08
- Assignees: FUJIFILM Corporation
- Inventors: Masayuki Naya; Takeharu Tani
- Web page: https://patentgrep.com/patent/US20100165334A1

## CPC

- G01N 21/658: {enhancement Raman, e.g. surface plasmons}
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

A Raman spectroscopic device includes an optical resonator, in which a first reflecting body that exhibits semi transmissivity/semi reflectivity and has a surface which is a light scattering surface that generates Raman scattering, a transparent body, and a second reflecting body that exhibits reflectivity, are laminated in sequence one on another. The Raman spectroscopic device utilizes light absorption due to resonance to obtain a surface amplified Raman effect.

## Claims

### Claim at position 1

1-12. (canceled)

### Claim 13

A Raman spectroscopic device for use in Raman spectroscopy, in which a measuring light beam of a particular wavelength is irradiated onto a sample in contact with a light scattering surface, Raman scattered light generated at the light scattering surface is spectrally decomposed, and is employed for detecting a detection target substance in the sample, in the form of an optical resonator, comprising:
a first reflecting body that exhibits semi transmissivity/semi reflectivity and has a surface which is the light scattering surface for generating Raman scattering;
a transparent body; and
a second reflecting body that exhibits reflectivity, laminated in sequence one on another;
whereby the intensity of the Raman scattered light is amplified by the amplified electric field at the light scattering surface by light absorption, generated by resonance in the optical resonator upon irradiation of the measuring light beam.

### Claim 14 (depends on 13)

A Raman spectroscopic device as defined in claim 13, wherein:
the first reflecting body has a structure of protrusions and recesses, which are smaller than the wavelength of the measuring light beam to be irradiated onto the light scattering surface.

### Claim 15 (depends on 14)

A Raman spectroscopic device as defined in claim 14, wherein:
the first reflecting body is a metal layer formed in a pattern on the surface of the transparent body.

### Claim 16 (depends on 14)

A Raman spectroscopic device as defined in claim 14, wherein
the first reflecting body is a metal layer comprising a plurality of non-aggregate metal particles which are fixed to the surface of the transparent body.

### Claim 17 (depends on 14)

A Raman spectroscopic device as defined in claim 14, wherein:
the transparent body is a transparent finely apertured body having a plurality of fine apertures which are open in a surface facing the first reflecting body and of which the diameters are smaller than the wavelength of the measuring light beam in diameter; and
the first reflecting body is a metal layer having a plurality of fine apertures along the shape of the surface of the transparent body.

### Claim 18 (depends on 17)

A Raman spectroscopic device as defined in claim 17, wherein:
the transparent finely apertured body is a metal oxide body obtained by anodic oxidization of a part of a metal body;
the second reflecting body is a non anodic oxidized part of the anodic oxidized metal body; and
the first reflecting body is a metal layer formed as a film on the transparent body.

### Claim 19 (depends on 17)

A Raman spectroscopic device as defined in claim 17, wherein:
at least a portion of the plurality of fine apertures of the transparent finely apertured body is filled with metal.

### Claim 20 (depends on 19)

A Raman spectroscopic device as defined in claim 19, wherein:
the bottoms of the plurality of fine apertures of the transparent finely apertured body are filled with metal.

### Claim 21 (depends on 14)

A Raman spectroscopic device as defined in claim 14, wherein the first reflecting body comprises:
a metal column structured film having a number of substantially parallel columns extending in a direction not parallel to the surface of the transparent body.

### Claim 22 (depends on 14)

A Raman spectroscopic device as defined in claim 14, wherein the first reflecting body comprises:
a dielectric column structured film having a number of substantially parallel columns extending in a direction not parallel to the surface of the transparent body; and
a metal film formed on the dielectric column structure film.

### Claim 23 (depends on 13)

A Raman spectroscopic apparatus, comprising:
a Raman spectroscopic device as defined in claim 13;
a light irradiating means for irradiating a measuring light beam of a particular wavelength onto the light scattering surface of the Raman spectroscopic device; and
a spectral means for spectrally decomposing the light scattered by the light scattering surface, thereby obtaining the spectrum of Raman scattered light.

### Claim 24 (depends on 23)

A Raman spectroscopic apparatus as defined in claim 23, wherein:
the spectral means receives and spectrally decomposes only scattered light of non directly reflected components of the measuring light beam scattered at the light scattering surface.