Surface-Emitting Conduction Layout to Cut Light Absorption
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Solution Overview
Problem
Conventional surface emitting elements experience light absorption due to the presence of highly doped regions on optical waveguides, leading to a decrease in output.
Innovation Solution
A surface emitting element design with a low resistance region positioned away from the central portion of the light emitting region, connected to electrodes via a conduction path, which includes a low resistance region in contact with element configuration parts, allowing for good conductivity while minimizing light absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a highly doped region is used to connect the light emitting region and electrode, then good conductivity is achieved, but light absorption increases
Solution Approach 1:
The patent extracts the highly doped region from the optical waveguide area and relocates it to a position outside the light emission path. The low resistance region is formed in the substrate at a position deviated from the central portion of the light emitting region, thereby removing the harmful light absorption effect while preserving the necessary electrical conductivity function.
Solution Approach 2:
The patent applies local quality by creating a highly doped low resistance region only in specific areas where electrical conductivity is needed, while keeping the optical waveguide region lightly doped to minimize light absorption. This spatial differentiation of doping concentration optimizes both electrical and optical performance in their respective locations.
2Reliability
If additional wiring is added to connect elements, then conductivity is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the substrate and the low resistance conduction path into a single integrated structure. The highly doped low resistance region is formed directly in the substrate, combining the substrate's mechanical support function with the electrical conduction function, thereby eliminating the need for separate wiring structures.
Solution Approach 2:
The substrate is given multiple functions: it serves as both the mechanical base structure and the electrical conduction path. By forming the low resistance region in the substrate, the substrate simultaneously provides structural support and electrical connectivity, reducing overall 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
The design enhances light output by reducing light absorption and enables high-density element configuration without the need for additional wiring, improving manufacturing efficiency and productivity.
Implementation Method 1
a low resistance region that is a region in contact with the second structure and has lower resistance than other regions
Implementation Method 2
capable of suppressing light absorption
Data Source
AI summary
To provide a surface emitting element including a conduction structure that makes a second structure including a light emitting region and an electrode conductive with good conductivity and can suppress light absorption. A surface emitting element according to the present technology includes a first structure including a substrate, and a second structure provided on the first structure and including a light emitting layer including a light emitting region, in which the first structure includes a low resistance region that is a region in contact with the second structure and has lower resistance than other regions, and the low resistance region is provided at a position deviated from at least a central portion of the light emitting region in a plan view. According to the surface emitting element according to the present technology, it is possible to provide a surface emitting element including a conduction structure that makes the second structure including the light emitting region and the electrode conductive with good conductivity and that can suppress light absorption.