Fresnel Lenses in 90° Twisted-Nematic Liquid Crystals With Optical and Electrical Controllability
This letter presents an optically and electrically controllable Fresnel lens in a 90° twisted-nematic liquid crystal (LC) cell with a photoconductive polymer layer. A dc voltage was applied to the cell irradiated using an interference pattern obtained from a Sagnac interferometer. The dc electric fi...
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| Veröffentlicht in: | IEEE photonics technology letters 2016-07, Vol.28 (13), p.1462-1464 |
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| container_title | IEEE photonics technology letters |
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| creator | Lin, Shih-Hung Li, Chien-Yu Kuo, Chie-Tong Yeh, Hui-Chen |
| description | This letter presents an optically and electrically controllable Fresnel lens in a 90° twisted-nematic liquid crystal (LC) cell with a photoconductive polymer layer. A dc voltage was applied to the cell irradiated using an interference pattern obtained from a Sagnac interferometer. The dc electric field caused the accumulation of ionic impurities on the substrates, thereby reducing the strength of the electric field in the cell. Light illumination caused an increase in the conductivity of the photoconductive layer, increasing the electric field in the bright zones of the interference pattern. The difference in the electric fields in the bright and dark zones led to discrepancies in the reorientation of the LC, allowing it to be tuned by adjusting the intensity of the Fresnel pattern and the applied dc voltage. |
| doi_str_mv | 10.1109/LPT.2016.2555699 |
| format | Article |
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A dc voltage was applied to the cell irradiated using an interference pattern obtained from a Sagnac interferometer. The dc electric field caused the accumulation of ionic impurities on the substrates, thereby reducing the strength of the electric field in the cell. Light illumination caused an increase in the conductivity of the photoconductive layer, increasing the electric field in the bright zones of the interference pattern. The difference in the electric fields in the bright and dark zones led to discrepancies in the reorientation of the LC, allowing it to be tuned by adjusting the intensity of the Fresnel pattern and the applied dc voltage.</description><identifier>ISSN: 1041-1135</identifier><identifier>EISSN: 1941-0174</identifier><identifier>DOI: 10.1109/LPT.2016.2555699</identifier><identifier>CODEN: IPTLEL</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Diffraction ; Electric fields ; Fresnel lens ; Fresnel reflection ; interferometer ; Laser beams ; Lenses ; Optical refraction ; Optical variables control ; photoconductive polymer ; twisted-nematic liquid crystal</subject><ispartof>IEEE photonics technology letters, 2016-07, Vol.28 (13), p.1462-1464</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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The difference in the electric fields in the bright and dark zones led to discrepancies in the reorientation of the LC, allowing it to be tuned by adjusting the intensity of the Fresnel pattern and the applied dc voltage.</description><subject>Diffraction</subject><subject>Electric fields</subject><subject>Fresnel lens</subject><subject>Fresnel reflection</subject><subject>interferometer</subject><subject>Laser beams</subject><subject>Lenses</subject><subject>Optical refraction</subject><subject>Optical variables control</subject><subject>photoconductive polymer</subject><subject>twisted-nematic liquid crystal</subject><issn>1041-1135</issn><issn>1941-0174</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kMtOwzAQRS0EEqWwR2JjiXWCJ34kXqKoBaSIsihiaTmJI1ylSWu7Qv0rvoEvw6UVq5nR3DuPg9AtkBSAyIfqbZlmBESacc6FlGdoApJBQiBn5zEnMQeg_BJdeb8iBBinbILquTN-MD2uzOCNx3bAkvx84-WX9cG0yatZ62AbXNntzra4dHsfdO_xhw2feLGJLd1jPbR41psmuL-yHIfgxr7Xte1t2F-jiy5azM0pTtH7fLYsn5Nq8fRSPlZJkxERkhrieYJqEDKjwKksaNtyxigTomnaDNpamAJ0ITqWdyT-JoSkWtc8k6yWgk7R_XHuxo3bnfFBrcadG-JKBXlR0JxCTqKKHFWNG713plMbZ9fa7RUQdSCpIkl1IKlOJKPl7mixxph_ec64yCCnv5v7bng</recordid><startdate>20160701</startdate><enddate>20160701</enddate><creator>Lin, Shih-Hung</creator><creator>Li, Chien-Yu</creator><creator>Kuo, Chie-Tong</creator><creator>Yeh, Hui-Chen</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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A dc voltage was applied to the cell irradiated using an interference pattern obtained from a Sagnac interferometer. The dc electric field caused the accumulation of ionic impurities on the substrates, thereby reducing the strength of the electric field in the cell. Light illumination caused an increase in the conductivity of the photoconductive layer, increasing the electric field in the bright zones of the interference pattern. The difference in the electric fields in the bright and dark zones led to discrepancies in the reorientation of the LC, allowing it to be tuned by adjusting the intensity of the Fresnel pattern and the applied dc voltage.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/LPT.2016.2555699</doi><tpages>3</tpages></addata></record> |
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| identifier | ISSN: 1041-1135 |
| ispartof | IEEE photonics technology letters, 2016-07, Vol.28 (13), p.1462-1464 |
| issn | 1041-1135 1941-0174 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Diffraction Electric fields Fresnel lens Fresnel reflection interferometer Laser beams Lenses Optical refraction Optical variables control photoconductive polymer twisted-nematic liquid crystal |
| title | Fresnel Lenses in 90° Twisted-Nematic Liquid Crystals With Optical and Electrical Controllability |
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