Radiation-Emitting Body with Roughened Interface and Planar Reflection Layer
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Solution Overview
Problem
Existing radiation-emitting bodies suffer from the abnormal skin effect, which leads to partial absorption of electromagnetic radiation energy, reducing the efficiency of coupling-out radiation, especially in the infrared wavelength range and visible light.
Innovation Solution
A radiation-emitting body with a layer sequence comprising an active layer, an intermediate layer, and a reflection layer is designed, where the active layer's interface is roughened and the reflection layer is planar, allowing for the separation of scattering and reflection effects, thereby avoiding absorption and enhancing radiation coupling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a roughened interface is used for scattering radiation, then scattering efficiency is improved, but energy absorption increases due to the abnormal skin effect
Solution Approach 1:
The interface is divided into two distinct interfaces: a roughened interface for scattering and a planar interface for reflection. This segmentation separates the scattering function from the reflection function, preventing the abnormal skin effect that occurs when both functions are combined in a single roughened reflective interface.
Solution Approach 2:
An intermediate layer with a planar interface is introduced between the roughened active layer interface and the reflection layer. This intermediate layer acts as a mediator that receives scattered radiation and directs it to the planar reflective interface, thereby avoiding energy absorption while maintaining effective scattering.
2Loss of energy
If the reflection layer interface is made planar, then reflection efficiency is improved, but scattering capability is reduced
Solution Approach 1:
The radiation management functions are segmented into two separate interfaces: the roughened interface handles scattering while the planar interface handles reflection. This allows each interface to be optimized for its specific function without compromising the other.
Solution Approach 2:
The scattering and reflection functions are merged into a coordinated two-interface system where the roughened interface scatters radiation and the planar reflective interface reflects it back into the active layer, achieving both scattering and reflection efficiency simultaneously.
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 increases the efficiency of radiation coupling-out by preventing energy absorption due to the abnormal skin effect, with the intermediate layer being substantially transmissive and the reflection layer reflecting electromagnetic waves effectively, improving the overall performance of the radiation-emitting body.
Implementation Method 1
An electromagnetic radiation emitted by the active layer is scattered at the roughening of the interface of the active layer
Implementation Method 2
the scattered electromagnetic radiation is reflected back at the reflection layer
Implementation Method 3
The intermediate layer is preferably substantially transmissive to the electromagnetic wave generated by the active region
Data Source
AI summary
A radiation-emitting body comprising a layer sequence, having an active layer (10) for generating electromagnetic radiation, having a reflection layer (50), which reflects the generated radiation, and having at least one intermediate layer (40) arranged between the active layer (10) and the reflection layer (50). In this case, the active layer (10) has a roughening on an interface (15) directed toward the reflection layer (50), and the reflection layer (50) is substantially planar at an interface (45) directed toward the active layer (10). Also disclosed is a method for producing a radiation-emitting body, which involves forming a layer sequence on a substrate having an active layer (10) for generating electromagnetic radiation. In this case, the method comprises roughening an interface (15) on the active layer (10), and forming at least one intermediate layer (40) and a reflection layer (50).