Nanostructured Acousto-Optic Device Diffraction Angle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Acousto-optic devices using natural mediums have a limited range of diffraction angle due to limited optical anisotropy and acousto-optic coefficients, requiring additional optical systems that increase system size and reduce resolution in applications like optical scanners and modulators.
Innovation Solution
An acousto-optic device with a nanostructured optical waveguide, a metal layer, and a gain medium layer, where surface acoustic waves are generated to increase the diffraction angle, utilizing a tapered cross-section and multiple quantum well structures to enhance light amplification and diffraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a natural medium is used in an acousto-optic device, then the device structure is simple, but the diffraction angle range is limited
Solution Approach 1:
The patent employs a composite structure combining a natural acousto-optic medium with a photonic crystal layer. The photonic crystal layer, having a periodic refractive index structure, is integrated with the acoustic wave propagation path to enhance the diffraction angle range while maintaining the simplicity of the natural medium configuration. This composite approach allows the device to achieve broader diffraction angles without significantly increasing structural complexity.
2Shape
If the diffraction angle range is increased using a separate optical system, then the diffraction angle range is improved, but the system size increases
Solution Approach 1:
The patent merges the diffraction angle enhancement function directly into the acousto-optic medium by integrating a photonic crystal layer within the acoustic wave propagation path. This eliminates the need for separate optical systems that would otherwise be required to expand the diffraction angle range, thereby increasing the functional density and reducing the overall system size.
3Shape
If the diffraction angle range is increased using a separate optical system, then the diffraction angle range is improved, but the resolution is reduced
Solution Approach 1:
The integration of the photonic crystal layer with the acousto-optic medium creates a composite structure where the periodic refractive index variations in the photonic crystal enhance diffraction angles while maintaining precise optical control. This composite design achieves broader diffraction angle ranges without the resolution degradation that would result from adding separate optical 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 nanostructured acousto-optic device achieves a broader diffraction angle, reducing the need for additional optical systems and enhancing the operational range of optical scanners and modulators, while maintaining high resolution and efficiency.
Implementation Method 1
The acousto-optic effect is an effect in which a refractive index of light is periodically varied in a medium by a series of compressions and rarefactions in the medium produce by sonic waves such as ultrasonic waves propagating in the medium. The series of compressions and rarefactions produces a phase grating in the medium, which diffracts light incident on the medium.
Implementation Method 2
a sonic wave generator configured to generate surface acoustic waves (SAWs) and apply the SAWs to the optical waveguide and/or the metal layer
Implementation Method 3
a gain medium layer disposed in the first portion of the optical waveguide
Data Source
AI summary
An acousto-optic device includes an optical waveguide in which incident light is able to propagate; a metal layer surrounding at least a first portion of the optical waveguide; a gain medium layer disposed in the first portion of the optical waveguide; and a sonic wave generator configured to generate surface acoustic waves (SAWs) and apply the SAWs to the optical waveguide and/or the metal layer.