Dynamic Meta-Holography Using Liquid Crystal Polarization Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies have not successfully developed a display or equipment capable of producing multiple hologram images in real time using optical metasurfaces.
Innovation Solution
A stimulus-responsive dynamic meta-holographic device comprising a metasurface with nanostructures and a liquid crystal layer that alters the polarization state of a transmitted beam in response to outer stimuli such as electricity, temperature, or pressure, allowing for the generation of different hologram images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If optical metasurfaces are used to produce hologram images, then the hologram production capability is improved, but the ability to produce multiple hologram images in real time deteriorates
Solution Approach 1:
The patent employs a liquid crystal layer that can dynamically change its optical properties in response to external stimuli such as voltage, temperature, or light. This dynamic characteristic allows the metasurface to switch between different hologram images in real time, transforming a static optical system into a dynamic one capable of multiple states. The liquid crystal molecules reorient themselves under external control, modulating the phase and amplitude of transmitted light to generate different holographic patterns.
Solution Approach 2:
The invention utilizes changes in physical parameters of the liquid crystal layer to control hologram generation. By varying parameters such as applied voltage, temperature, or illumination intensity, the optical properties (refractive index, birefringence) of the liquid crystal are modified, enabling the system to produce multiple distinct hologram images from a single metasurface configuration.
2Device complexity
If a static metasurface is used, then the device complexity is reduced, but the real-time dynamic hologram production capability deteriorates
Solution Approach 1:
The patent introduces a liquid crystal layer as an intermediary between the incident light and the metasurface. This intermediary material acts as a controllable modulator that can dynamically adjust the optical field before it interacts with the fixed metasurface structure. The liquid crystal layer serves as a buffer that adds temporal dynamics without requiring changes to the metasurface itself, thus maintaining structural simplicity while enabling real-time hologram production.
3Manufacturing precision
If optical metasurfaces are used without stimulus response, then the manufacturing precision is improved, but the versatility of hologram types deteriorates
Solution Approach 1:
The patent creates a universal holographic device where a single metasurface design can generate multiple different hologram images through the liquid crystal layer's response to various external stimuli. The fixed nanostructures serve as a universal template that, when combined with dynamically controllable liquid crystal states, can produce diverse holographic patterns including different images, colors, or optical effects without requiring multiple specialized metasurfaces.
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
Enables the real-time production of multiple hologram images by altering the polarization state of the transmitted beam in response to external stimuli, providing a dynamic and versatile holographic display.
Implementation Method 1
a liquid crystal layer provided on one side of the metasurface, comprising a plurality of cells configured to be altered in arrangement by an outer stimulus; and wherein the liquid crystal layer is configured to change polarization state of a transmitted beam penetrating the liquid crystal layer as the plurality of the cells are altered in arrangement by the outer stimulus
Implementation Method 2
A hologram is defined as a video produced with interference of light
Implementation Method 3
a metasurface where a plurality of nanostructures are provided
Data Source
AI summary
This disclosure relates to a stimulus-responsive dynamic meta-holographic device. According to an aspect of the disclosure, a stimulus-responsive dynamic meta-holographic device can be provided, which includes a metasurface in which a plurality of nanostructures are provided; wherein in the metasurface is provided a liquid crystal layer comprising a plurality of cells that may be altered in arrangements by outer stimulus, wherein the liquid crystal layer, is configured to alter the polarization state of the transmitted beam penetrating the liquid crystal layer as the arrangements of the cells are altered by outer stimulus.