Vertical-Emitting Laser Meta-Element for Mode and Beam Shaping
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Solution Overview
Problem
Existing semiconductor laser devices face challenges in stabilizing specific laser modes and optimizing laser light reflection and shaping, particularly in achieving targeted intensity profiles and polarization-dependent shaping.
Innovation Solution
A vertical-emitting semiconductor laser apparatus incorporates an optical meta-element with varying meta-structures and refractive indices to control laser light reflection and shaping, allowing for localized adjustment of reflectivity and refractive index to stabilize specific laser modes and shape the light according to intended profiles and polarization directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional laser devices are used without meta-elements, then the device structure is simpler, but the ability to stabilize specific laser modes and control intensity profiles is insufficient
Solution Approach 1:
An optical meta-element is introduced as an intermediary component between the laser cavity and the external environment. This meta-element comprises meta-structures with sub-wavelength dimensions that mediate the interaction between laser light and the device, enabling precise control of reflection, transmission, and mode stabilization without requiring fundamental changes to the laser device structure itself
Solution Approach 2:
The meta-element enables dynamic control of optical parameters including reflection coefficients, transmission phases, and effective refractive indices by adjusting the geometric parameters of the meta-structures. This allows stabilization of specific laser modes through parameter optimization without changing the fundamental device architecture
2Manufacturing precision
If meta-elements are added to control laser light shaping, then the intensity profile and polarization control are improved, but the manufacturing complexity increases
Solution Approach 1:
The meta-element employs local quality variations through spatially distributed meta-structures with different geometries, orientations, and densities at specific locations. This enables localized control of optical properties such as reflection, transmission, and polarization across different regions of the laser beam without requiring complex global manufacturing processes
Solution Approach 2:
The meta-structures operate in the sub-wavelength dimension, utilizing features with dimensions smaller than the laser wavelength. This dimensional approach enables precise optical control through geometric parameters rather than requiring large-scale structural modifications, simplifying the manufacturing process while achieving high precision
3Adaptability or versatility
If the meta-element uses varying meta-structures for polarization-dependent shaping, then the laser light control capability is enhanced, but the device complexity increases
Solution Approach 1:
The meta-element incorporates asymmetric meta-structures with different geometric shapes, orientations, and dimensions to achieve polarization-dependent optical responses. These asymmetric structures interact differently with orthogonal polarization states, enabling independent control of s-polarized and p-polarized light components through a single integrated element rather than multiple separate components
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 solution enables precise stabilization of specific laser modes and efficient shaping of laser light, enhancing the intensity profile and polarization-dependent control, thereby improving the performance and functionality of the semiconductor laser device.
Implementation Method 1
The reflection of the laser light to be coupled out of the main body of the semiconductor laser device at the surface can be set by way of the meta-element
Implementation Method 2
The optical meta-element includes an optical metamaterial for shaping the laser light
Data Source
AI summary
A laser apparatus includes a vertical-emitting semiconductor laser device for emitting laser light. The vertical-emitting semiconductor laser device includes a main body having a first mirror section, a second mirror section, and an active layer arranged between the first mirror section and the second mirror section for generating the laser light. The main body has an emission region on a surface thereof for emission of the laser light. The laser apparatus further includes an optical meta-element arranged on the emission region. The optical meta-element includes an optical metamaterial for shaping the laser light. The optical meta-element is configured to emit the laser light in at least one laser mode.