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Optic frequency doubling or tripling film high in conversion efficiency

An optical frequency doubling and frequency triple technology, applied in the field of integrated optics, can solve problems such as weak nonlinear signals

Inactive Publication Date: 2014-06-04
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
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Problems solved by technology

In the study of the nonlinear effects of microstructures, a single metal nanoparticle has received extensive attention and exploration. However, since the metal nanoparticle only has electrical resonance, the enhancement effect on the incident light wave is only dozens of times, so the generated non-linear The linear signal is relatively weak

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  • Optic frequency doubling or tripling film high in conversion efficiency
  • Optic frequency doubling or tripling film high in conversion efficiency
  • Optic frequency doubling or tripling film high in conversion efficiency

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] structured as figure 2 , 3 As shown, a grating structure based on a "sandwich" structure as a periodic unit with a period of p. The main structure is composed of a "sandwich" structure, and the "sandwich" structure is composed of a three-layer structure, in which the upper and lower layers 1 and 3 are metal, and the middle layer 2 is a dielectric structure. In the present invention, frequency doubling / tripling organic materials (hemicyanine (HC) derivatives / polydiacetylene (PDA) derivatives) are used as intermediate dielectric materials. Hemicyanine (HC) derivatives and polydiacetylene (PDA) derivatives are commonly used second-order and third-order nonlinear optical materials, respectively.

[0029] The upper and lower layers of the metamaterial are metal layers, and the magnetic nanostrips working in the visible light frequency domain use silver as the mat...

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Abstract

The invention provides an optic frequency doubling or tripling film high in conversion efficiency. The optic frequency doubling or tripling film comprises a unit structure composed of three layers. The upper layer and the lower layer are of metal structures, and the intermediate layer is of a medium structure. A period unit structure is composed of several unit structures, the period is p, and frequency doubling or tripling organic materials are intermediate medium materials. The optic frequency doubling or tripling film has the advantages that size is small, and the metamaterial structure is about 100 nanometers in thickness so that application of the film in the integrated optics is more facilitated; conversion efficiency is high; local electromagnetic field is effectively reinforced by magnetic resonance of the magnetic metamaterial in the structure, and accordingly, nonlinear effect of nonlinear materials is greatly improved, and nonlinear response of the nonlinear material in the same thickness cannot be observed; response speed is fast; metal plasmas can be activated within several femtoseconds, and superfast processing of optic signals is facilitated.

Description

technical field [0001] The invention relates to integrated optics, in particular to an optical frequency doubling or triple frequency film with high conversion efficiency. Background technique [0002] Traditional nonlinear optical materials are large in size and suffer from phase mismatch. This effect originates from the dispersion of the material, which causes the non-conservation of photon momentum in the nonlinear process, leading to interference and low conversion efficiency. [0003] To improve conversion efficiency, phase matching techniques must be used, including birefringent phase matching, angular phase matching, and quasi-phase matching. But each technique has its own drawbacks. [0004] Nano-metal composite materials use the local electric field enhancement of metal particles to improve the nonlinear effect, but the effect of electric resonance is limited, and the effect is far inferior to that of magnetic resonance. [0005] With the rapid development of non...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/355G02F1/37
Inventor 肖淑敏孙上宋清海
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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