Polymer Optical Metamaterial Sensor for Strain and Temperature
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Solution Overview
Problem
Existing optical components, particularly those based on silicon, are brittle, energetically complex, and costly to produce, limiting their use and reliability in applications such as optical communications and strain gauges.
Innovation Solution
An optical component with a polymer substrate featuring a first and second refractive index, formed through point-to-point exposure with a short-pulse laser or doping, which creates a metamaterial with periodically arranged pixels for efficient optical signal manipulation and strain/temperature measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicon-based optical components are used, then optical signal manipulation capability is achieved, but the component becomes brittle and costly to produce
Solution Approach 1:
The patent changes the material parameter from silicon to polymer, fundamentally altering the mechanical properties (from brittle to flexible) and manufacturing characteristics. This material substitution resolves the contradiction by providing both mechanical robustness and ease of manufacture through lower-cost polymer processing techniques.
Solution Approach 2:
The patent creates a composite structure by embedding metallic nanoparticles (gold, silver, or aluminum) within a polymer matrix. This composite approach combines the flexibility and ease of manufacturing of polymers with the optical manipulation capabilities previously requiring silicon, while the nanoparticles provide the necessary optical functionality without the brittleness of pure silicon.
2Adaptability or versatility
If silicon substrate is used for optical metamaterial, then optical signal manipulation is enabled, but energy consumption increases and production becomes complex
Solution Approach 1:
The patent changes the production method parameters from high-energy silicon fabrication to lower-energy polymer processing. The polymer can be processed at lower temperatures and with simpler techniques, dramatically reducing energy consumption while maintaining optical functionality through the embedded metallic nanoparticles.
Solution Approach 2:
The patent adopts polymer materials that are inherently cheaper and easier to process than silicon. The polymer substrate can be manufactured using cost-effective methods such as spin coating, dip coating, or inkjet printing, eliminating the need for expensive silicon fabrication facilities and reducing overall production energy requirements.
3Ease of manufacture
If polymer substrate is used, then manufacturing cost decreases and robustness improves, but measurement precision may be affected
Solution Approach 1:
The patent uses composite materials (polymer with metallic nanoparticles) to maintain measurement precision. The metallic nanoparticles provide stable optical resonances that are sensitive to strain and temperature changes, ensuring high measurement accuracy despite the use of flexible polymer substrate. The composite structure compensates for any potential precision losses.
Solution Approach 2:
The patent creates local regions with high refractive index contrast by embedding metallic nanoparticles in specific patterns within the polymer. This local quality enhancement ensures that the measurement regions maintain high precision through strong optical field confinement and sensitivity, while the overall polymer substrate provides cost-effectiveness and robustness.
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 polymer-based optical component is more cost-effective, robust, and capable of measuring strain and temperature with high sensitivity, offering improved reliability and versatility compared to silicon-based components.
Implementation Method 1
In other embodiments of the invention, thermal effects can be generated in the substrate material by means of laser radiation, which lead to a change in the refractive index.
Implementation Method 2
The optical component comprises at least one region in which an optical metamaterial is formed... each of which comprises a region having the first or the second refractive index
Implementation Method 3
The substrate exhibits a greater thermal expansion compared to silicon. This allows certain predefinable properties of the metamaterial to change, enabling the optical component to be used for temperature measurement.
Data Source
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AI summary
The invention relates to an optical component (1) with a substrate (10) having a first refractive index, in which spatial regions (12) with a second refractive index are formed, wherein the optical component (1) contains at least one optical metamaterial (2) which contains a plurality of individual pixels (21, 22), each of which comprises a spatial region having the first or the second refractive index, and wherein the substrate (10) contains or consists of at least one polymer. The invention further relates to a sensor with such an optical component and a method for measuring strain and/or temperature.