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Glass photonic crystal band-gap devices with polarizing properties

A photonic crystal and glass technology, applied in the direction of polarizing elements, can solve the problems of inability to produce a high degree of polarization, narrow wavelength band, and difficulty in miniaturization

Inactive Publication Date: 2009-07-15
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this type of device is inexpensive and can be mass-produced, it is often unsatisfactory because of its limited utility due to its difficulty in miniaturization, its inability to generate high degrees of polarization, and the narrow wavelength bands it can use

Method used

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  • Glass photonic crystal band-gap devices with polarizing properties
  • Glass photonic crystal band-gap devices with polarizing properties
  • Glass photonic crystal band-gap devices with polarizing properties

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Embodiment Construction

[0017] As used herein, the term radius refers to half the diameter of a circular channel, or half the distance of the largest dimension of a non-circular channel such as a rectangular, square, octagonal, trapezoidal or other shaped channel. Herein, the terms "pore", "channel" and "opening" are used interchangeably.

[0018] figure 1 A photonic crystal structure is illustrated with a regular series of side-by-side channels passing through the thicknesses shown, creating a band gap, which is a band of light that prohibits light from propagating in certain directions. For different polarizations of light, the photonic band gap is different. In some bands, only one polarization can propagate, and other polarizations are completely reflected. If the operating wavelength of light is in one of these bands, then photonic crystals can work as polarizers. The incident light hυ is polarized such that TM polarized light passes (is propagated) and TE polarized light is completely reflec...

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Abstract

The invention is directed to polarizing devices that can be scaled to polarize electromagnetic radiation having wavelengths in ultraviolet to microwave range; and more particularly to devices suitable for use at visible and IR wavelengths. The device has a length, a width and a thickness, and a patterned system of channels, voids or holes embedded in or through a glass matrix and running through the thickness of the glass to thereby polarize incoming electromagnetic radiation having two polarization modes orthogonal to one another, blocking the passage of or reflecting one mode and permitting the other mode to pass through the device. The glass can be any glass suitable for transmitting the electromagnetic radiation in the range it will be used without excessive transmission losses due to absorbance of radiation in that range by moieties present in the glass. In one aspect, the device according to the invention may be deemed a ''universal'' polarizer: in the sense that it can be made to work in wavelength ranges from the microwave to the ultraviolet. The devices can also be made of polymeric materials utilizing the principles enumerated in the specification.

Description

field of invention [0001] The present invention relates to a glass polarization device with a photonic bandgap structure. In particular, the present invention relates to polarizing devices that can be manipulated in size to polarize electromagnetic radiation having wavelengths in the ultraviolet to microwave range; more particularly, the present invention relates to devices suitable for telecommunications wavelengths. Finally, the invention describes a method of making a glass polarizing device. Background of the invention [0002] Regular unpolarized light consists of many waves whose electric and magnetic fields point randomly, but the two fields are usually perpendicular (orthogonal) to each other and to the direction of transmission. By convention, light is considered to be a combination of two polarizations. Polarization is unimportant when light is transmitted through a multi-state fiber. However, when light is transmitted through a singlet fiber, the polarization o...

Claims

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Application Information

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IPC IPC(8): G02B5/30
Inventor N·F·宝雷利K·W·科齐三世S·A·库奇斯基S·马加诺维克
Owner CORNING INC
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