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Optical waveguide device

A technology of optical waveguide and wavelength, applied in the direction of light beam guiding device, optical waveguide light guide, light guide, etc., can solve the problems of lower resolution, inability to eliminate defects, and increase cost

Inactive Publication Date: 2004-03-17
GIFU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if a light source with light intensity is used to increase the intensity of near-field light, it will increase the cost
On the other hand, if you increase the size of the end opening, the light is spread over a wider area and the resolution is reduced
Therefore, neither case can eliminate the drawbacks in practical application

Method used

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Embodiment Construction

[0058] will now refer to Figure 1 to Figure 8 , describes the optical waveguide device 11 according to the first embodiment, which is an optical probe.

[0059] Such as figure 1 As shown, the optical waveguide device (optical probe) 11 of this embodiment includes: a main body 12, which is a rectangular metal plate. The body 12 is made of a dielectric having a negative real part of the relative complex permittivity. That is, body 12 is made of a negative dielectric (plasmon activation medium). In the present embodiment, the wavelength of transmitted light is 488nm (nanometer), and the body 12 is made of silver (Ag) in which the real part of the relative complex permittivity is -7.38. The relative complex permittivity of the dielectric is represented by the ratio of the permittivity of the dielectric to the permittivity in vacuum.

[0060] Such as figure 1, 3(a), and 3(b), an optical waveguide 13 for transmitting light is formed on the main body 12 through the thickness di...

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Abstract

An optical waveguide device increases the intensity of light transmitted through an optical waveguide for a reduced cost without expanding the area of the light. The optical waveguide device according to the present invention includes an optical waveguide and defining surfaces defining the optical waveguide. The defining surfaces are formed of plasmon activating medium. The defining surface include a pair of inner parts that face each other along a direction perpendicular to a light transmission direction. The distance between the inner parts is less than the half of the wavelength of the light transmitted through the optical waveguide.

Description

technical field [0001] The present invention relates to an optical waveguide suitable for scanning near-field optical microscopes and optical data recorders. Background technique [0002] In recent years, as a technology that can optically process light in a region smaller than the wavelength of light (visible light: 0.4 to 0.8 micrometers), technology using near-field light (light that reaches a region shorter than the wavelength of light) has attracted extreme attention. Big attention. For example, in the field of scanning near-field optical microscopy, an optical probe composed of an optical fiber having minute openings is used as an optical waveguide. The size of the opening is smaller than the wavelength of light. When observing a minute area on the surface of a sample, the minute opening of the optical probe is positioned very close to the area, and the light field (near field) appearing outside the opening comes into contact with the surface of the sample. Then, a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01Q60/18G01Q60/22G01Q80/00G02B6/00G02B6/10G02B6/122G02B6/24G11B7/135H01L21/027
CPCG01Q60/22G02B6/241G02B6/1226B82Y20/00B82Y35/00G02B6/10
Inventor 田中嘉津夫田中雅宏
Owner GIFU UNIVERSITY
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