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Polarization-independent filter based on guided-mode resonance liquid crystal structure

A liquid crystal structure, guided mode resonance technology, applied in instruments, nonlinear optics, optics, etc., to achieve the effects of easy control, easy production, and low toxicity

Inactive Publication Date: 2013-07-10
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

However, none of the above filters combine polarization-independent guided-mode resonant filters with tunable filtering

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  • Polarization-independent filter based on guided-mode resonance liquid crystal structure
  • Polarization-independent filter based on guided-mode resonance liquid crystal structure

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the present invention is not limited to the following examples.

[0018] As shown in FIG. 1 , the polarization-independent filter based on the guided mode resonance liquid crystal structure of the present invention includes a first electrode layer 1 , a grating layer 3 , a second electrode layer 2 and a base layer 4 .

[0019] An adjustable voltage power supply is connected between the first electrode layer 1 and the second electrode layer 2, which is used to adjust the ITO (nano indium tin oxide) on the first electrode layer 1 and the second electrode layer 2 at both ends of the grating layer. The voltage makes the filter peak wavelengths of the transverse electric mode (TE) and the transverse magnetic mode (TM) coincide to realize the polarization-independent effect.

[0020] First, the material of the second electrode layer 1, 2 is ITO (nano indi...

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Abstract

The invention relates to a polarization-independent filter based on a guided-mode resonance liquid crystal structure. The polarization-independent filter comprises a first electrode layer, a grating layer, a second electrode layer and a substrate layer. A voltage-adjustable power supply is connected between the first electrode layer and the second electrode layer and is used for adjusting the voltage on nanometer indium tin metal oxide (ITO) of the first electrode layer and the second electrode layer of two ends of the grating layer to coincide the wavelengths of filter waves of a transverse electric mode (TE) and a transverse magnetic mode (TM) so as to realize polarization independent effect. The voltage on the ITO (indium tin metal oxide) at two ends of the crystal can be adjusted, so that resonance wavelengths of different polarization states can be changed, the wavelengths of the filter waves of the transverse electric mode (TE) and the transverse magnetic mode (TM) can be coincident, and adjustable polarization independent effect of the filter can be realized.

Description

technical field [0001] The invention relates to a polarization-independent wavelength division multiplexing optical communication system and device, in particular to a polarization-independent filter based on a guided-mode resonant liquid crystal structure. Background technique [0002] The guided mode resonant filter is a sub-wavelength micro-nano optical device, which has the advantages of narrow bandwidth, high reflection, and simple structure, so the guided mode resonant filter is limited in optical switches, biosensors, anti-counterfeiting labels, and solar cells Wave structures, beam selection, and polarizers have a wide range of applications. In 2008, Xiaoyong Fu et al., Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, proposed a vertically incident polarization-independent guided mode resonant filter. Through appropriate parameters, the TE mode and TM mode have the same resonance wavelength (OPTICS LETTERS, 34, 124, 2, 2009). In 2010, F...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13
Inventor 陈麟吕腾胡东臧小飞彭滟袁明辉蔡斌朱亦鸣
Owner UNIV OF SHANGHAI FOR SCI & TECH
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