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Two-dimensional topological photonic crystal cavity and its design method and application in laser

A technology of photonic crystal and two-dimensional topology, which is applied in the direction of semiconductor lasers, lasers, phonon exciters, etc., can solve the problems of low power and large divergence angle of a single device, and achieve large mode field area, narrow beam divergence angle, narrow The effect of line width

Active Publication Date: 2020-09-18
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the gain spectrum of traditional semiconductor lasers is wide, there are many modes, and there are phenomena such as large divergence angles and low power of a single device.

Method used

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  • Two-dimensional topological photonic crystal cavity and its design method and application in laser
  • Two-dimensional topological photonic crystal cavity and its design method and application in laser
  • Two-dimensional topological photonic crystal cavity and its design method and application in laser

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Embodiment Construction

[0037] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present disclosure.

[0038] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the present disclosure. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features,...

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Abstract

A two-dimensional topological photonic crystal cavity, its design method and its application in lasers. The two-dimensional topological photonic crystal cavity includes a plurality of photonic crystal super cells. The plurality of photonic crystal super cells have vortex structural changes around the center of the cavity of the two-dimensional topological photonic crystal cavity, and the plurality of photonic crystal super cells The energy band of the cell has a Dirac point at the equilibrium position where the vortex structure changes. This two-dimensional topological photonic crystal cavity, also called a Dirac vortex cavity, has the characteristics of large mode field area, large free spectral range, narrow beam divergence angle, arbitrary mode degeneracy, and compatibility with a variety of substrate materials. It is used in surface-emitting semiconductor lasers to ensure that the laser can still operate stably in a single transverse mode and a single longitudinal mode in a large area and high energy output.

Description

technical field [0001] The present disclosure relates to the technical field of a two-dimensional topological photonic crystal cavity, and more specifically, relates to a two-dimensional topological photonic crystal cavity, a design method thereof, and an application in a laser. Background technique [0002] Semiconductor lasers have the advantages of high efficiency, long life, small size, wide wavelength range, easy integration and modulation, etc., and are widely used in optical communication, optical processing, medical and military fields. However, the gain spectrum of traditional semiconductor lasers is wide, there are many modes, and there are phenomena such as large divergence angles and low power of a single device. [0003] Single-mode semiconductor lasers are standard light sources in the fields of optical communications, spectroscopy, metrology and sensing. Uniform one-dimensional Bragg grating distributed feedback laser (DFB) is widely used in long-distance opt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/122G02B27/00H01S5/10
CPCG02B6/1225G02B27/0012H01S5/11H01S5/423H01S2301/163
Inventor 陆凌杨乐臣高晓梅
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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