Semiconductor Laser with Integrated Polarization Grating
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Solution Overview
Problem
Conventional semiconductor lasers require complex production steps and additional components to achieve polarized laser light, leading to increased costs and inefficiencies.
Innovation Solution
A semiconductor component with a metallic polarization grating integrated on its surface, which is produced in a similar step to the electrical contacts, forming a resonator cavity with mirror portions and an active layer to generate coherent, temperature-independent polarized laser light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional polarization devices are incorporated into semiconductor lasers, then polarized laser light can be achieved, but production complexity and costs increase
Solution Approach 1:
The patent combines the polarization grating and electrical contacts into a single integrated structure produced in one manufacturing step. The metallic polarization grating is formed simultaneously with the electrical contacts through a single deposition and patterning process, eliminating the need for separate polarization device integration and reducing overall device complexity while maintaining polarized light emission capability
2Ease of manufacture
If polarization gratings are etched into the resonator cavity surface, then laser light polarization is achieved, but manufacturing steps and costs increase
Solution Approach 1:
The patent replaces the mechanical etching process with a deposition-based approach. Instead of etching grooves into the resonator cavity surface, a metallic layer is deposited and patterned to form the polarization grating structure. This substitution of the manufacturing mechanism simplifies the process, reduces precision requirements, and lowers production costs while achieving the same polarizing effect
3Productivity
If photodiodes are combined with semiconductor lasers, then laser light detection is enabled, but additional production steps are required
Solution Approach 1:
The metallic polarization grating serves multiple functions simultaneously: it acts as the polarization element for light emission, provides electrical contact pathways, and can serve as a reflective surface for integrated photodiode detection. This multi-functionality eliminates the need for separate photodiode components and their associated production steps, improving productivity while managing device complexity
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
This approach reduces production steps and costs while ensuring high reflectivity and surface quality, enabling efficient and cost-effective emission of polarized laser light.
Implementation Method 1
a metallic polarization grating arranged on a surface of the main body on the emission region
Implementation Method 2
The active portion serves to generate the laser light
Implementation Method 3
a first mirror portion, a second mirror portion, and an active portion arranged between the first mirror portion and the second mirror portion
Data Source
AI summary
A semiconductor component for emitting laser light includes a main body having at least one mesa portion with an emission region for the laser light. The emission region includes a first mirror portion, a second mirror portion, and an active portion arranged between the first mirror portion and the second mirror portion. The active portion serves to generate the laser light. The semiconductor component further includes electrical contacts for feeding electrical energy into the active portion, and a metallic polarization grating arranged on a surface of the main body on the emission region.