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Liquid crystal and metal interface charge-based non-linear surface plasmon polaritons device

A nonlinear surface, plasma technology, applied in nonlinear optics, instruments, optics, etc., can solve problems such as difficult to achieve integration, difficult device performance to meet requirements, incompatibility with integrated circuit processes, etc.

Inactive Publication Date: 2011-07-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the weak nonlinear effect of silicon materials has made the performance of these devices difficult to meet the requirements.
Although traditional nonlinear optical materials such as lithium niobate and other inorganic crystals have considerable nonlinearity, they are not compatible with current integrated circuit technology and are difficult to integrate

Method used

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  • Liquid crystal and metal interface charge-based non-linear surface plasmon polaritons device
  • Liquid crystal and metal interface charge-based non-linear surface plasmon polaritons device

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing to dope charge generator fullerene C 60 Or methyl red nematic liquid crystal as an example to describe the present invention in more detail.

[0023] Realize the structure of the non-linear surface plasmon polariton (SPPs) device of the present invention: on the bottom surface of the prism, prepare a gold film with a thickness of nanometer scale, cover the liquid crystal layer doped with the charge generator under the gold film, for example, it can be doped with mass 1 / 10,000 to 5 / 10,000 percent fullerene C 60 Or doped with methyl red with a mass percentage of 1 / 1000 to 30 / 1000, the liquid crystal layer is located in the liquid crystal cell, and the other bottom surface of the liquid crystal cell is a conductive glass substrate covered with a nematic liquid crystal alignment film.

[0024] Realize the concrete preparation process of the present invention as follows:

[0025] 1) Use an ultrasonic cleaner to clean a high-re...

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Abstract

The invention provides a liquid crystal and metal interface charge-based non-linear surface plasmon polaritons device, belongs to the technical field of micro-nanophotonics, realizs non-linear surface plasmon polaritons (SPPs) under milliwatt-order input power, and provides a technical scheme for non-linear SPPs integration of a doped charge generator-based liquid crystal non-linear material. The device can utilize spatial light to excite the SPPs through a prism on a gold film and a nematic liquid crystal interface, wherein the non-linear characteristics of the SPPs realized through an interface charge and nematic liquid crystal feedback effect can be acquired by measuring an optical signal output by prism coupling. The interface charge and nematic liquid crystal-based non-linear SPPs mechanism and the implementation scheme have practical application values in integrated opto chips in the future.

Description

technical field [0001] The invention belongs to the field of micro-nano photonics, in particular to a nonlinear surface plasmon excitation device. Background technique [0002] In recent decades, efforts have been made to replace integrated circuits with photonic integrated circuits to meet the increasing demands of information exchange and processing. However, due to the optical diffraction limit, the size of photonic components is always on the order of microns, and it is impossible to achieve a high degree of integration comparable to that of electronic chips. Surface Plasmon Polaritons (SPPs for short) are coupling modes of electromagnetic waves propagating at the interface between metal and dielectric and free electron oscillations. It can limit the propagation of light waves to a scale much smaller than the wavelength, breaking the diffraction limit of traditional optics, thereby realizing highly integrated optoelectronic chips. In addition, the application of metal-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35
Inventor 姚凤凤裴延波刘海孙秀冬
Owner HARBIN INST OF TECH
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