EO Polymer Optical Device Clad Layer Ionic Liquid
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical devices using organic electrooptic polymers face issues with peeling of polling electrodes and crack generation in clad layers due to thermal decomposition and mismatched thermal expansion coefficients, leading to inefficient polling and non-uniform optical modulation.
Innovation Solution
The use of clad layers polymerized with a reactive ionic liquid and a blocking layer, such as SiO2 or Al2O3, to prevent ion migration and polymerization initiator residues, along with a Co complex polymerization reaction, which enhances heat resistance and suppresses crack formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional clad layers are used with polymerization initiators, then the clad layers can be formed, but thermal decomposition occurs during polling causing peeling and cracks
Solution Approach 1:
The patent removes the polymerization initiator from the clad layer composition entirely. By using a monomer that polymerizes without requiring initiator residues (such as acrylonitrile-based monomers with peroxide initiation that fully decomposes), the harmful factor of thermal decomposition is eliminated while maintaining the clad layer's structural integrity during polling.
Solution Approach 2:
The patent changes the chemical composition parameters of the clad layer by selecting specific monomers and initiators with appropriate thermal stability. The initiator is chosen to fully decompose at polling temperatures, and the monomer is selected to polymerize without leaving harmful residues, thereby changing the thermal decomposition characteristics of the clad layer.
2Reliability
If clad layers with mismatched thermal expansion coefficients are used, then the structure can be formed, but crack generation occurs due to thermal expansion mismatch
Solution Approach 1:
The patent adjusts the compositional parameters of the clad layer monomer and initiator to control the thermal expansion coefficient. By selecting specific polymerization systems, the clad layer's thermal expansion characteristics are optimized to match the core layer, reducing thermal expansion stress during temperature changes in the polling process.
3Productivity
If polling treatment is applied to orient EO pigment, then optical modulation is achieved, but electrode peeling occurs due to thermal decomposition
Solution Approach 1:
The patent removes the source of thermal decomposition by eliminating initiator residues from the clad layer. This allows the polling treatment to proceed effectively for optical modulation without the harmful side effects of thermal decomposition that cause electrode peeling.
Solution Approach 2:
The patent converts the potential harm of thermal decomposition into a benefit by carefully selecting initiators that decompose completely at polling temperatures, transforming what would be a harmful thermal process into a beneficial purification that leaves no harmful residues.
4Reliability
If reactive ionic liquid polymerization is used, then crack formation is suppressed and heat resistance is enhanced, but the polymerization process becomes more complex
Solution Approach 1:
The patent changes the polymerization mechanism parameters by using ionic liquid-based initiation systems that operate at lower temperatures and without requiring complex multi-step processes. This simplifies the overall process while achieving superior heat resistance and crack suppression.
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 solution ensures appropriate polling of the core layer and prevents crack generation in the clad layers, maintaining optical modulation intensity and electrode integrity.
Implementation Method 1
a polymer polymerized in a composition containing a reactive ionic liquid is used in the clad layers
Implementation Method 2
a blocking layer that blocks migration of ions included in the reactive ionic liquid between the core layer and the clad layer
Implementation Method 3
the EO polymer exhibits a stronger secondary nonlinear optical effect than inorganic materials
Implementation Method 4
a polymerization reaction, in which a Co complex is used
Data Source
AI summary
An optical device including a core layer that includes an EO polymer, and clad layers that are disposed on and beneath the core layer, in which a polymer polymerized in a composition containing a reactive ionic liquid is used in the clad layers.