Superlattice Electro-Optic Shutter for Fast Reconfigurable Light Control
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Solution Overview
Problem
Existing mechanical optical devices have excessive size, weight, and power requirements, slow response times, and limited reconfiguration capabilities, making them unsuitable for large-scale and military applications.
Innovation Solution
The development of solid-state electro-optic devices utilizing a superlattice semiconductor structure with doped semiconductor layers that can transition between transparent and opaque states within milliseconds, enabling electrically switchable shutters, variable apertures, and dynamic image filters, suitable for cryogenic environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical shutters and apertures are used, then optical control functions are achieved, but size, weight, and power requirements become excessive
Solution Approach 1:
The patent replaces mechanical shutters and apertures with a solid-state electro-optic device comprising a superlattice semiconductor structure. This structure includes alternating layers of first and second semiconductor materials with different bandgaps, controlled by electrical signals to switch between transparent and opaque states, thereby eliminating moving mechanical parts and reducing device weight while maintaining optical control functionality
Solution Approach 2:
The patent changes the optical parameters of the semiconductor layers by applying electrical signals that modify the carrier concentration and band structure. By adjusting the electrical bias, the device transitions between transparent and opaque states, enabling dynamic optical control without mechanical movement, thus reducing weight and power requirements
2Ease of operation
If mechanical shutters are used, then light blocking function is achieved, but response time becomes slow
Solution Approach 1:
The patent replaces mechanical shutters with an electro-optic switching mechanism based on superlattice semiconductor structure. Electrical signals rapidly modulate the optical properties of the semiconductor layers by changing carrier distribution, achieving light blocking and transmission switching in microseconds, thereby dramatically improving response time compared to mechanical systems
Solution Approach 2:
The patent employs periodic electrical signaling to control the optical state of the superlattice structure. By applying alternating electrical biases, the device can rapidly switch between transparent and opaque states at high frequencies, enabling fast response times suitable for dynamic optical control applications
3Ease of operation
If mechanical apertures are used, then aperture size adjustment is achieved, but reconfiguration capability is limited
Solution Approach 1:
The patent implements a dynamic aperture control system where the optical transmission properties of the superlattice semiconductor structure can be continuously adjusted by varying electrical signal parameters. This enables real-time reconfiguration of aperture size and pattern without mechanical movement, providing enhanced adaptability for different imaging and optical control applications
Solution Approach 2:
The patent creates a multi-functional device where the same superlattice semiconductor structure can perform multiple functions including aperture control, shutter operation, and optical modulation. By programming different electrical signal patterns, the device can be reconfigured for various applications, greatly enhancing versatility compared to dedicated mechanical components
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 solid-state devices provide rapid switching speeds, reduced SWaP requirements, and real-time reconfiguration capabilities, enhancing their suitability for orbital satellite applications and extreme temperature conditions.
Implementation Method 1
solid-state electro-optic devices utilizing a superlattice semiconductor structure with doped semiconductor layers that can transition between transparent and opaque states within milliseconds
Data Source
AI summary
A method is provided for operating one or more one solid-state electro-optic device to provide an electrically switching shutter. The method includes forming an alternating stack of first semiconductor layers having a first dopant and second semiconductor layers having a second dopant to form at least one superlattice semiconductor device. The method further includes applying to the at least one superlattice semiconductor device a first voltage to induce a transparent state of the alternating stack such that light is transmitted through the alternating stack, and applying to the at least one superlattice semiconductor device a second voltage different from the first voltage to induce an opaque state of the alternating stack such that light is inhibited from passing through the alternating stack.