Dynamic Beam Switching by Liquid Crystal Tunable Dielectric Metasurfaces

Dynamic steering of laser beams by ultrathin optical metasurfaces is a significant research advance for possible applications in remote ranging and sensing. A unique platform for such important functionalities is offered by dielectric metasurfaces that have the highest transmission efficiency. Howev...

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Bibliographic Details
Published inACS photonics Vol. 5; no. 5; pp. 1742 - 1748
Main Authors Komar, Andrei, Paniagua-Domínguez, Ramón, Miroshnichenko, Andrey, Yu, Ye Feng, Kivshar, Yuri S., Kuznetsov, Arseniy I., Neshev, Dragomir
Format Journal Article
LanguageEnglish
Published American Chemical Society 16.05.2018
Subjects
beam steering
liquid crystals
optical metasurface
dielectric resonators
tunable metasurface
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Summary:Dynamic steering of laser beams by ultrathin optical metasurfaces is a significant research advance for possible applications in remote ranging and sensing. A unique platform for such important functionalities is offered by dielectric metasurfaces that have the highest transmission efficiency. However, the realization of dynamically tunable metasurfaces still remains a challenge. Here we experimentally demonstrate the dynamic switching of beam deflection by a silicon-nanodisk dielectric metasurface infiltrated with liquid crystals. In particular, we show the switching of a laser beam from 0° to a 12° angle with an efficiency of 50% by heating the metasurface to modify the liquid crystal state from nematic to isotropic. Our results open important opportunities for tunable ultrathin beam steering metadevices.
ISSN:2330-4022
2330-4022
DOI:10.1021/acsphotonics.7b01343