Ultrasonic/acoustic control of light waves for left-right optical reflection asymmetry
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United States of America Patent
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Feb 2, 2021
Grant Date -
May 30, 2019
app pub date -
Apr 8, 2017
filing date -
Apr 8, 2016
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Abstract
Methods and systems of altering optical reflection via dynamic control of an ultrasonic/acoustic guided wave field in an acousto-optical wave conductor are described. Ultrasonic/acoustic waves transmitted by an acousto-optical wave conductor are used to modify the ability of the acousto-optical wave conductor to propagate light waves via the acousto-optical wave conductor when a light beam impinges onto one surface of the acousto-optical wave conductor. A one-way optical device may be produced by using a dynamic tuning approach to modify the sound field via mode and frequency choice (and possibly beam focusing and steering as well) in order to produce special light reflection and transmission effects. Oscillations in stress (and mass density) along the acousto-optical wave conductor and possibly across the thickness of the acousto-optical wave conductor may serve as a special acousto-optic Bragg diffraction grating that alters the nonspecular reflection of light.
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