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Two-dimensional topological photonic crystal cavity, design method thereof 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, enhanced The effect of job stability

Active Publication Date: 2020-01-24
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • 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, design method thereof and application in laser
  • Two-dimensional topological photonic crystal cavity, design method thereof and application in laser
  • Two-dimensional topological photonic crystal cavity, design method thereof 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

The invention discloses a two-dimensional topological photonic crystal cavity, a design method thereof, and application in a laser. The two-dimensional topological photonic crystal cavity comprises aplurality of photonic crystal supercells that have a vortex-type structure change around the cavity center of the two-dimensional topological photonic crystal cavity, and the energy band of the plurality of photonic crystal supercells has a Dirac point at the equilibrium position where the vortex-type structure changes. The two-dimensional topological photonic crystal cavity, also known as a Diracvortex cavity, has the characteristics such as large mode field area, large free spectral range, narrow beam divergence angle, degeneracy of any mode and compatibility with a variety of substrate materials, and can be applied to surface emitting semiconductor lasers to ensure that the laser can still work stably in both single transverse mode and single longitudinal mode when outputting at largearea and high energy.

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 Applications(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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