Phase-Change Switch Optical Coupler for Uniform Laser Heating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing phase change material switches suffer from non-uniform laser radiation absorption, leading to incomplete phase changes in certain regions, causing leakage currents due to insufficient heating.
Innovation Solution
Incorporating an optical coupler with two superimposed waveguides that guide the laser signal differently across the phase change material, ensuring uniform absorption and complete phase transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single waveguide is used to deliver laser signal to phase change material, then the device structure is simple, but the laser radiation absorption is non-uniform causing incomplete phase changes
Solution Approach 1:
The single waveguide is segmented into two parallel waveguides that deliver laser signals from different directions. This segmentation allows uniform illumination of the phase change material by distributing the laser radiation through multiple paths, ensuring complete and uniform phase changes across the entire material region.
Solution Approach 2:
The solution transitions from a single-dimensional waveguide configuration to a two-dimensional arrangement with two parallel waveguides. This dimensional change enables laser signals to approach the phase change material from multiple spatial directions, achieving uniform energy distribution that prevents localized heating issues.
2Temperature
If laser signal is delivered from one direction only, then the optical path is simple, but certain regions of phase change material receive insufficient heating
Solution Approach 1:
The optical coupling is segmented into two separate waveguide paths that deliver laser energy from opposite directions. This segmentation ensures that all regions of the phase change material, including those previously in shadow, receive adequate thermal energy for complete and uniform phase transitions.
Solution Approach 2:
Different regions of the phase change material receive tailored optical energy delivery through the two waveguides. The dual-waveguide configuration ensures that regions previously suffering from insufficient heating now receive appropriate thermal energy, creating uniform local heating conditions across the entire material.
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
Ensures uniform laser power distribution across the phase change material, preventing leakage currents and ensuring reliable switching states.
Implementation Method 1
the optical coupler comprises first and second waveguides superimposed opposite said face
Implementation Method 2
ensuring uniform absorption and complete phase transitions
Implementation Method 3
capable of alternating between a crystalline, electrically conductive phase and an amorphous, electrically insulating phase
Data Source
Figure 1A~2A
Figure 2B~3
Figure 4~5
AI summary
The present description relates to a switch (200) based on a phase-change material comprising: - a region (103) in said phase-change material connecting first and second conduction electrodes (101A, 101B) of the switch; and - an optical coupler (201) of a laser signal for activating the switch, located opposite a face of the region in said phase-change material.