Active Dichroic Optical Device with Refractive Index Modulation
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Solution Overview
Problem
Existing dichroic devices have static characteristics, limiting their ability to adapt to changes in imaging or external environments, such as light brightness and color, and face challenges in miniaturization and color contrast.
Innovation Solution
An active dichroic optical device is developed, comprising a substrate with a metal nanostructure and an active refractive index modulation layer that modulates the resonance wavelength of applied light in response to external energy, allowing for dynamic control of light reflection, transmission, and scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing static dichroic devices are used, then the device structure is simple, but the device cannot adapt to changes in imaging or external environments and has limited memory capacity
Solution Approach 1:
The patent transforms the static dichroic device into a dynamic one by introducing an active refractive index modulation layer that can change its refractive index in response to external energy input. This allows the device to actively control and adapt its optical properties (color, phase) dynamically, resolving the contradiction between adaptability and structural simplicity by adding only a functional modulation layer rather than complex mechanical or optical systems
Solution Approach 2:
The invention changes the refractive index parameter of the modulation layer to achieve active control of the resonance wavelength. By modulating this physical parameter in response to external energy, the device gains adaptability without requiring complex structural changes, thus resolving the contradiction between enhanced versatility and maintained structural simplicity
2Adaptability or versatility
If mechanical stretching or laser deformation methods are used to achieve active control, then some adaptability is improved, but process yield and performance are reduced with low color contrast
Solution Approach 1:
The patent replaces mechanical stretching and laser deformation methods with an optical field-based refractive index modulation approach. The active modulation layer responds to external energy (electrical, thermal, or optical) by changing its refractive index, thereby controlling the resonance wavelength without mechanical intervention. This substitution eliminates the manufacturing defects and low color contrast associated with mechanical methods while maintaining active control capability
Solution Approach 2:
The invention employs a composite structure combining metal nanostructures with an active refractive index modulation layer. This composite material system leverages the plasmonic resonance of metal nanoparticles and the tunable refractive index of the modulation layer to achieve high color contrast and superior optical performance, overcoming the limitations of previous single-material approaches
3Volume of moving object
If existing methods are used for miniaturization, then device size is reduced, but color contrast and performance deteriorate
Solution Approach 1:
The patent segments the dichroic device into distinct functional components: metal nanostructures for plasmonic resonance and an active refractive index modulation layer for dynamic control. This segmentation allows independent optimization of each component, enabling miniaturization of the overall device while maintaining high color contrast through the localized surface plasmon resonance effect of the metal nanoparticles
Solution Approach 2:
The invention applies local quality by concentrating the optical interaction at the nanoscale metal nanoparticle sites where localized surface plasmon resonance occurs. The active modulation layer provides localized refractive index changes around these nanoparticles, enabling high color contrast in a miniaturized configuration. This local optimization allows the device to achieve superior performance despite reduced overall size
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 device achieves improved color contrast and miniaturization, enabling adaptive control of light properties, suitable for applications in displays and optical memory devices, with the ability to change colors in response to external energy.
Implementation Method 1
the metal nanostructure reflects, transmits, and scatters a resonance wavelength of applied light
Implementation Method 2
the active refractive index modulation layer modulates a resonance wavelength of the metal nanostructure by modulating a refractive index of light applied to the active dichroic optical device as external energy is applied
Data Source
AI summary
An embodiment of the present invention provides an active dichroic optical device including a substrate; a first phase tunable material layer applied on the substrate; a metal nanostructure deposited on the first phase tunable material layer; and a second phase tunable material layer applied on the metal nanostructure, in which the first and second phase tunable material layers modulate the refractive index of light applied to the active dichroic optical device as external energy is applied and the metal nanostructure reflects, transmits, and scatters the resonance wavelength of the applied light.