Method and devices for controlling optical phase delay utilizing electrically tuned liquid crystal nano-structures
First Claim
1. An optical phase delay device for providing phase delayed optical outputs comprising:
- at least two parallel covering plates having a physical separation in between;
regions of polymer materials spaced by a distance substantially smaller than one micrometer;
regions of liquid crystal particles interleaving the said regions of polymers;
and a group of electrodes being fabricated near the said covering glass plates.
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Abstract
A method and devices for obtaining optical phase delay utilizing electrically tuned liquid crystal nano-structures are disclosed. In one preferred embodiment, an electrically tuned liquid crystal nano-structure provides optical phase delay. The disclosed device consists of cover plates, electrodes, nanometer scaled structures with polymer regions and regions filled with liquid crystal materials, and the controlling electronic circuit. By adjusting the applied electric field in the liquid crystal nano-structure, different polarization components of the incoming light will experience different phase delays without changing their propagating direction. In another preferred embodiment, an optical polarization tuner based on aforementioned electrically tuned liquid crystal nano-structures is disclosed. The polarization tuner consists of an polarization beam splitter, two electrically tuned liquid crystal nano-structures, and two beam folding prisms. By adjusting the applied electrical fields through the two liquid crystal nano-structures, light outputs with different polarization states are obtained. In yet another preferred embodiment, a spatial light modulator device based on aforementioned electrically tuned liquid crystal nano-structures is disclosed. The spatial light modulator consists of a nano-structured liquid crystal, a multi-channel electrode structure and controlling electronic circuit. The multi-channel electrode structure can be used to establish different electrical fields in different spatial regions such that the phase of the incoming light can be modified with spatial specificity.
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Citations
23 Claims
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1. An optical phase delay device for providing phase delayed optical outputs comprising:
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at least two parallel covering plates having a physical separation in between;
regions of polymer materials spaced by a distance substantially smaller than one micrometer;
regions of liquid crystal particles interleaving the said regions of polymers;
and a group of electrodes being fabricated near the said covering glass plates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for providing optical phase delay comprising the following steps:
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using a collimated light source having specific wavelength;
passing the input light to an electrically tuned liquid crystal nano-structure consisting of alternating polymer and liquid crystal regions;
applying electrical voltages to electrodes near the said liquid crystal nano-structure to tune the said optical phase delay. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification