Polarization-insensitive phase modulator
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United States of America Patent
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Sep 5, 2023
Grant Date -
Jul 21, 2022
app pub date -
Apr 5, 2022
filing date -
Mar 16, 2016
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Abstract
An optical device (20) includes an electro-optical layer, including a liquid crystal material (24) with a heliconical structure having a pitch that is less than 250 nm and is modifiable by an electric field. An array of excitation electrodes (28) extends over the electro-optical layer. Control circuitry (23) is coupled to apply control voltage waveforms to the excitation electrodes and is configured to modify the control voltage waveforms so as to locally modify a molecule director angle of the heliconical structure and thus to generate a specified phase modulation profile in the electro-optical layer.
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