Reflective Optical Device with Laminated Dielectric-Graphene Layers
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Solution Overview
Problem
Optical modulation elements with a metal-insulator-metal (MIM) structure tend to generate high-order diffracted light, leading to a deterioration in the intensity of reflected light, which limits the ability to vary the reflection angle effectively.
Innovation Solution
A reflective optical device with a laminated structure comprising dielectric and two-dimensional material layers, where voltage is applied to control the refractive index and phase of electromagnetic waves, allowing for the variation of reflection angles without weakening the intensity of the reflected light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a metal-insulator-metal (MIM) structure is used in optical modulation elements, then the reflection angle can be varied by modulating the refractive index, but high order diffracted light is generated causing deterioration in the intensity of reflected light
Solution Approach 1:
The insulator is divided into multiple regions with different refractive indices, and the reflective surface is segmented into multiple reflective units. This segmentation allows independent control of each region's optical properties, enabling reflection angle modulation while suppressing high-order diffraction that would otherwise reduce overall reflected light intensity.
Solution Approach 2:
Different regions of the insulator are assigned different refractive indices, and different reflective units are assigned different reflection characteristics. This local differentiation enables precise control over the optical path and phase, allowing reflection angle variation without generating harmful high-order diffracted light that would diminish the main reflected beam intensity.
2Ease of operation
If voltage is applied to modulate the refractive index in MIM structure, then reflection angle can be controlled, but the generation of diffracted light weakens the reflected light intensity
Solution Approach 1:
The refractive index of the insulator is made dynamically可调 through voltage application, allowing real-time modulation of the reflection angle. The reflective units are configured to dynamically adjust their reflection characteristics in response to voltage changes, enabling continuous control while maintaining high reflected light intensity by minimizing diffraction losses.
Solution Approach 2:
The refractive index parameter of the insulator is changed through voltage application to modulate the reflection angle. By carefully controlling this parameter change and designing the reflective units with appropriate geometric parameters, the system achieves reflection angle control without generating significant high-order diffraction that would cause energy loss in the reflected light.
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 effectively varies the reflection angle of electromagnetic waves by controlling the phase and refractive index, preventing the generation of high-order diffracted light and maintaining the intensity of the reflected light, thus enhancing the optical modulation capabilities.
Implementation Method 1
voltage is applied to the electrode part, the refractive index of the first two-dimensional material layer in each of the first laminated structure and the second laminated structure varies
Implementation Method 2
the phase of the electromagnetic wave to be reflected in each of the first laminated structure and the second laminated structure varies
Implementation Method 3
a reflective plate... the reflection angle of the electromagnetic wave can be varied
Data Source
AI summary
A reflective optical device has an insulation layer, a lattice group, a rear surface electrode, and a voltage application unit. Lattice group is composed of a plurality of lattices including a lattice and a lattice. Each of the plurality of lattices has a structure in which dielectric layer and graphene layer are laminated. Voltage application unit has a function of individually applying a voltage to each of lattice group. Voltage application unit includes a voltage application unit to apply a first voltage to lattice, and a voltage application unit to apply a second voltage to lattice.