Hybrid Multilayer Reflector Structure for Surface-Emitting Lasers
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Solution Overview
Problem
Existing surface emitting lasers face challenges due to the material system of their multilayer reflectors, including poor heat dissipation and substrate warpage, which affect the laser's performance and yield.
Innovation Solution
A surface emitting laser design that incorporates a hybrid structure for the reflector, using a combination of GaAs-based and InP-based multilayer reflectors, along with a dielectric multilayer reflector, to compensate for the disadvantages of each material system and improve heat dissipation and substrate stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single material system multilayer reflector is used, then the structure is simple, but heat dissipation is poor and substrate warpage occurs
Solution Approach 1:
The patent applies composite materials by combining GaAs-based multilayer reflector and InP-based multilayer reflector in a hybrid structure. The GaAs-based reflector provides superior heat dissipation properties, while the InP-based reflector contributes to high reflectance and wavelength performance, creating a composite reflector system that overcomes the limitations of single-material reflectors
2Ease of manufacture
If a single material system multilayer reflector is used, then the manufacturing process is simple, but substrate warpage occurs
Solution Approach 1:
The hybrid reflector structure combines GaAs-based and InP-based multilayer reflectors with different thermal and optical properties. The GaAs-based portion provides thermal stability and reduces substrate warpage, while the InP-based portion maintains high reflectance, achieving both manufacturing feasibility and substrate stability
Solution Approach 2:
The patent applies local quality by assigning different material systems to different regions of the reflector structure. The GaAs-based multilayer reflector is positioned to handle heat dissipation and substrate stability requirements, while the InP-based multilayer reflector is positioned to optimize optical reflectance performance
3Loss of energy
If GaAs-based multilayer reflector is used, then heat dissipation is improved, but reflectance at certain wavelengths is insufficient
Solution Approach 1:
The hybrid reflector structure combines GaAs-based multilayer reflector and InP-based multilayer reflector in a hybrid structure. The GaAs-based reflector provides superior heat dissipation properties, while the InP-based reflector contributes to high reflectance and wavelength performance, creating a composite reflector system that overcomes the limitations of single-material reflectors
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed design enhances heat dissipation and reduces substrate warpage, leading to improved performance and yield of the surface emitting laser, while maintaining high reflectance and conductivity.
Implementation Method 1
a first reflector includes stacked a first multilayer reflector and a second multilayer reflector, the first multilayer reflector is made of a first material system, and the second multilayer reflector is made of a second material system that is different from the first material system
Data Source
AI summary
The present technology provides a surface emitting laser capable of compensating for disadvantages of a reflector due to a material system of a multilayer reflector in the entire reflector.The surface emitting laser according to the present technology includes: a first structure that includes a first reflector; a second structure that includes a second reflector; and an active layer that is disposed between the first and second structures, the first reflector includes stacked a first multilayer reflector and a second multilayer reflector, the first multilayer reflector is made of a first material system, and the second multilayer reflector is made of a second material system that is different from the first material system. According to the present technology, it is possible to provide the surface emitting laser capable of compensating for disadvantages of the reflector due to a material system in the entire reflector.