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Method for implementing annular cavity whispering gallery mode by photonic crystal structure

A whispering gallery mode and photonic crystal technology, applied in the structure of optical resonant cavity, structure/shape of active medium, laser, etc., can solve problems such as in-depth analysis of mode spectral line characteristics

Inactive Publication Date: 2009-08-05
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2002, Lee's group produced a photonic crystal ring cavity laser, but did not conduct an in-depth analysis of the mode and spectral line characteristics of the ring cavity[7]

Method used

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  • Method for implementing annular cavity whispering gallery mode by photonic crystal structure
  • Method for implementing annular cavity whispering gallery mode by photonic crystal structure
  • Method for implementing annular cavity whispering gallery mode by photonic crystal structure

Examples

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Effect test

Embodiment 1

[0047] according to figure 1 The two-dimensional photonic crystal thin plate structure can be realized on the InP material, and its energy band diagram is as follows figure 2 shown, combined with figure 1 and figure 2 ,according to image 3 Photonic crystal structures can be made to realize the whispering gallery mode.

[0048] The parameters of each part are selected as follows:

[0049] Material: InP quaternary semiconductor material with a refractive index of 3.4.

[0050] Photonic crystal structures that can realize whispering gallery modes: in e.g. figure 1 In the complete two-dimensional photonic crystal thin plate structure shown, 12 air holes are removed and six air holes are added at the corners of the photonic crystal ring cavity structure, the structure is as follows Figure 4 As shown, the period of the structure is 470nm, and the radius of the small hole is 141nm. refer to image 3 , during calculation and simulation, the photonic crystal annular cavity ...

Embodiment 2

[0053] according to figure 1 The two-dimensional photonic crystal thin plate structure can be realized on the InP material, and its energy band diagram is as follows figure 2 shown, combined with figure 1 and figure 2 ,according to image 3 Photonic crystal structures can be made to realize the whispering gallery mode.

[0054] Material: InP quaternary semiconductor material with a refractive index of 3.4.

[0055] Photonic crystal structures that can realize whispering gallery modes: in e.g. figure 1 In the complete two-dimensional photonic crystal thin plate structure shown, 12 air holes are removed and six air holes are added at the corners of the photonic crystal ring cavity structure, the structure is as follows Figure 4 As shown, the period of the structure is 470nm, and the radius of the small hole is 141nm. refer to image 3 , during calculation and simulation, the photonic crystal annular cavity is surrounded by 3 layers of photonic crystals (because the thr...

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Abstract

The invention discloses a method for adopting a photonic crystal structure to realize the whispering gallery mode of a ring cavity. In the method, 12 photonic crystal air holes are removed from a complete triangular lattice photonic crystal in the semiconductor material; 6 photonic crystal air holes are added at the annular corners; and then the ring cavity of the photonic crystal can be formed. The whispering gallery mode of the ring cavity produced in the method has good quality factors, and the mode is only a plurality of microns in size, thereby solving the problem that the whispering gallery mode is difficult to be integrated to a small scale size.

Description

technical field [0001] The present invention relates to the field of whispering gallery modes existing in a circular medium, in particular to a method for realizing the whispering gallery mode of an annular cavity by using a photonic crystal structure, so as to limit the whispering gallery mode through the photonic bandgap effect of the photonic crystal, thereby achieving The purpose of reducing the whispering gallery mode volume while maintaining a high quality factor. Background technique [0002] There is a whispering gallery mode in the circular medium. The whispering gallery mode is a kind of light wave that undergoes total internal reflection at the interface of the circular medium, circulates in the circular medium, and the energy of the electromagnetic field is mainly concentrated near the boundary of the circular medium. mode [1]. This mode has a very high quality factor and the energy is mainly concentrated at the boundary of the cavity, so the whispering gallery ...

Claims

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Application Information

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IPC IPC(8): H01S5/00H01S5/10H01S3/06H01S3/083H01S3/16
Inventor 郑婉华邢名欣任刚杜晓宇王科陈良惠
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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