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Liquid Crystal Switchable Surface Lattice Resonances in Plasmonic Metasurfaces

Sharma, Mukesh and Michaeli, Lior and Ben Haim, Danielle and Ellenbogen, Tal (2022) Liquid Crystal Switchable Surface Lattice Resonances in Plasmonic Metasurfaces. ACS Photonics, 9 (8). pp. 2702-2712. ISSN 2330-4022. doi:10.1021/acsphotonics.2c00453.

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Surface lattice resonances (SLRs) on metasurfaces strongly enhance the interaction of light with the metasurface and can be used for obtaining very high-Q response, high spectral sensitivity, and strong optical nonlinearities. Here, we study experimentally and numerically the dynamic switching of SLRs in gold nanoantenna metasurfaces fabricated on top of indium tin oxide by use of electrically controlled liquid crystals. Experimental results show that the cumulative effects of the anisotropic optical response with an applied electric field and the alignment conditions of liquid crystal molecules significantly affect the formation as well as the strength of SLR modes. We achieve an electrical modulation of >50% in the SLR dips by applying 2 V on the device. The strength of the modulation can be further optimized by modifying the angle of incidence and the polarization of light. These findings demonstrate that plasmonic metasurfaces activated by liquid crystals enable a versatile platform to obtain electro-optical control over SLRs and open the door to various new applications of dynamic reconfigurable metasurfaces.

Item Type:Article
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URLURL TypeDescription
Sharma, Mukesh0000-0002-3745-0086
Ben Haim, Danielle0000-0002-4979-971X
Additional Information:© 2022 American Chemical Society. Attribution 4.0 International (CC BY 4.0). Received 23 March 2022. Published online 3 August 2022. The authors would like to thank the Chaoul Center for Nanoscale Systems, Tel-Aviv University for fabrication of the devices. M.S. acknowledges the support from the Israeli Ministry of Science and Technology for the Postdoc Fellowship. This research was supported by the Israeli Ministry of Science and Technology grant agreement no. 3-15614. The authors declare no competing financial interest.
Funding AgencyGrant Number
Ministry of Science and Technology (Israel)3-15614
Subject Keywords:plasmonic metasurfaces; localized surface plasmons; surface lattice resonance; liquid crystals; gold nanoantenna arrays; active metasurfaces
Issue or Number:8
Record Number:CaltechAUTHORS:20220803-535996000
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Official Citation:Liquid Crystal Switchable Surface Lattice Resonances in Plasmonic Metasurfaces Mukesh Sharma, Lior Michaeli, Danielle Ben Haim, and Tal Ellenbogen ACS Photonics Article ASAP DOI: 10.1021/acsphotonics.2c00453
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:116072
Deposited By: George Porter
Deposited On:04 Aug 2022 23:12
Last Modified:29 Aug 2022 23:49

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