# US 6,285,811 B1 · Near-field optical microscope with infrared fiber probe

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- Number: US 6,285,811 B1
- Document ID: US6285811B1
- Status: Granted
- Kind: B1
- Application number: 09/267,919
- Filed: 1999-02-25
- Granted: 2001-09-04
- Earliest claimed: 1999-02-25
- Assignees: The United States of America as represented by the Secretary of the Navy
- Inventors: Ishwar D. Aggarwal; Jasbinder Sanghera; David Schaafsma
- Web page: https://patentgrep.com/patent/US6285811B1

## CPC

- G01Q 60/22: Probes, their manufacture, or their related instrumentation, e.g. holders
- B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals
- B82Y 35/00: Methods or apparatus for measurement or analysis of nanostructures
- Y10S 977/862: Near-field probe
- G01Q: SCANNING-PROBE TECHNIQUES OR APPARATUS; APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING PROBE MICROSCOPY [SPM]
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A near field optical microscope according to the present invention has (1) a single mode infrared optical fiber made from chalcogenide glass, chalcohalide glass, or a combination thereof, having a probe end adapted as a probe for near field optical microscopy, and further adapted for positioning within a near optical field of a sample; (2) a source of infrared light; for illuminating the sample; (3) a detector of infrared light; for detecting infrared light reflected from, emitted by, or transmitted through the sample, where at least one of the source of infrared light and the detector of infrared light are optically coupled to a distal end of the single mode infrared optical fiber.

## Claims

### Claim 1

A near-field optical microscope, comprising:
a single mode infrared optical fiber, having a probe end adapted as a probe for near-field optical microcopy, and further adapted for positioning within a near optical field of a sample, and wherein said optical fiber is selected from the group consisting of chalcogenide glass, chalcohalide glass and combinations thereof;
a source of infrared light adapted for illuminating said sample;
a detector of infrared light adapted for detecting infrared light reflected from, or transmitted through said sample;
wherein at least one of said source of infrared light and said detector of infrared light are optically coupled to a distal end of said single mode infrared optical fiber.

### Claim 2 (depends on 1)

The near field optical microscope of claim 1, wherein said infrared optical fiber is a chalcogenide optical fiber.

### Claim 3 (depends on 1)

The near field optical microscope of claim 1, wherein said infrared optical fiber is a chalcohalide optical fiber.

### Claim 4 (depends on 1)

The near field optical microscope of claim 1, wherein said detector of infrared light is optically coupled to a distal end of said single mode infrared optical fiber.

### Claim 5 (depends on 1)

The near field optical microscope of claim 1, wherein said source of infrared light is optically coupled to a distal end of said single mode infrared optical fiber.

### Claim 6 (depends on 1)

The near field optical microscope of claim 1, wherein said probe is disposed on an opposing side of said sample from at least one of said source of infrared light and said detector of infrared light.