Optical Device Light Absorption Layer Pillar Structures
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Solution Overview
Problem
Current optical sensors face challenges in achieving high spatial resolution due to limitations in light absorption and dispersion within their structures.
Innovation Solution
The optical device incorporates a light absorption layer with unit cells featuring pillar structures of varying sizes, which helps in inhibiting dispersion and enhancing light absorption, thereby improving spatial resolution. Additionally, filter layers or different materials can be used to further increase accuracy by reducing side bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional light absorption structures are used, then the device structure is simple, but spatial resolution is low due to limitations in light absorption and dispersion
Solution Approach 1:
The light absorption layer is segmented into multiple unit cells, each containing multiple pillar structures of different sizes. This segmentation allows different regions to absorb different wavelengths of light selectively, thereby improving spatial resolution while maintaining a manageable structural complexity through modular design
Solution Approach 2:
Different pillar structures within unit cells have different sizes and are positioned at specific locations to absorb specific wavelengths of light. This local differentiation of structural properties enables wavelength-specific absorption in different regions, enhancing spatial resolution without requiring complete structural redesign
2Measurement precision
If uniform pillar structures are used in the light absorption layer, then manufacturing is easier, but dispersion is not effectively inhibited reducing accuracy
Solution Approach 1:
The patent employs pillar structures with locally varied sizes within unit cells rather than uniform structures throughout. Each pillar's dimensions are optimized for specific wavelength absorption, effectively inhibiting unwanted dispersion and improving measurement accuracy
Solution Approach 2:
The pillar structures exhibit asymmetric size variations within unit cells, with different pillars having different diameters and heights. This asymmetry is strategically designed to target specific wavelength ranges, effectively suppressing dispersion effects and enhancing spectral resolution
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 configuration effectively enhances the spatial resolution and accuracy of the optical device by optimizing light absorption and reducing dispersion, leading to improved performance in capturing images or detecting light.
Implementation Method 1
the pillar structures of each of the unit cells are different sizes... effectively enhances the spatial resolution and accuracy of the optical device by optimizing light absorption and reducing dispersion
Implementation Method 2
a first junction layer... a light absorption layer... a second junction layer... configured to detect light
Data Source
AI summary
An optical device includes a first conductive layer, a first junction layer, a light absorption layer, a second junction layer, and a second conductive layer. The first junction layer is disposed on the first conductive layer. The light absorption layer is disposed on the first junction layer, wherein the light absorption layer includes a plurality of unit cells, each of the unit cells includes a plurality of pillar structures, and the pillar structures of each of the unit cells are different sizes. The second junction layer is disposed on the light absorption layer. The second conductive layer is disposed on the second junction layer.