Mesa Semiconductor Structure for Stable Light Polarization
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Solution Overview
Problem
Existing semiconductor components, such as VCSELs, face issues with unstable polarization direction of emitted light due to strong electric fields, which affect the refractive index and polarization properties.
Innovation Solution
A semiconductor component with a mesa body and stress elements attached to its surface to generate material stress, influencing the polarization properties of emitted light by altering the birefringent properties of the crystalline semiconductor material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the structural size is reduced to form strong electric fields, then the light emission intensity is improved, but the polarization direction stability deteriorates
Solution Approach 1:
The patent applies stress to the semiconductor component to change the refractive index parameters of the material, thereby compensating for the polarization instability caused by strong electric fields in miniaturized structures
Solution Approach 2:
The patent converts the harmful effect of strong electric fields (which cause polarization instability) into a beneficial outcome by applying mechanical stress that induces birefringence, thereby stabilizing the polarization direction despite the presence of strong electric fields
2Stability of the object's composition
If stress elements are added to stabilize polarization, then the polarization extinction ratio is improved, but the device complexity increases
Solution Approach 1:
The electrical contact structure is designed to serve dual functions: providing electrical connection and applying mechanical stress to stabilize polarization, thereby reducing device complexity despite the added functionality
Solution Approach 2:
The patent merges the stress application function with existing structural elements (electrical contacts or packaging components), avoiding the need for separate dedicated stress application mechanisms
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 material stress stabilizes the polarization extinction ratio, ensuring a time-stationary polarization direction of the emitted light, enhancing the stability and efficiency of light emission.
Implementation Method 1
at least one stress element (24) that is attached to a surface (22) of the main body (14). The stress element (24) is configured to generate in the main body (14) a material stress (25), which has an effect on one or more polarization properties of the emitted light (12)
Data Source
AI summary
A semiconductor component for emitting light includes a main body that comprises at least one mesa body. The mesa body has an emission region for emitting the light. The emission region is assigned a first mirror portion, a second mirror portion, and an active portion arranged between the two mirror portions and serving to produce the light. The semiconductor component further includes electrical contacts for feeding electrical energy into the active portion, with at least one stress element that is attached to a surface of the main body. The stress element is configured to generate in the main body a material stress which has an effect on one or more polarization properties of the emitted light.