Dynamic electro-optic reflective metasurfaces

Christopher Damgaard-Carstensen; Martin Thomaschewski; Fei Ding; Sergey I. Bozhevolnyi

doi:10.1117/12.2621605

30 May 2022 Dynamic electro-optic reflective metasurfaces

Christopher Damgaard-Carstensen, Martin Thomaschewski, Fei Ding, Sergey I. Bozhevolnyi

Proceedings Volume PC12130, Metamaterials XIII; PC121301I (2022) https://doi.org/10.1117/12.2621605
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Conference Poster

Abstract

Optical metasurfaces have been extensively investigated, but most are, however, static. We suggest an approach to realize electrically tunable optical metasurfaces, based on tuning the light reflectivity near a high-fidelity Fabry-Perot resonance. This concept is implemented in dynamic Fresnel lens focusing. The active Fresnel lens (AFL) exploits the electro-optic Pockels effect in a 300 nm thick lithium niobate layer sandwiched between a continuous thick and a nanostructured gold film serving as electrodes. We fabricate and characterize the AFL, focusing 800-900 nm radiation at a distance of 40 µm with the focusing efficiency of 15%, and demonstrating the modulation depth of 1.5%, with the driving voltage of ±10 V within the bandwidth of ~6.4 MHz.

Citation Download Citation

Christopher Damgaard-Carstensen, Martin Thomaschewski, Fei Ding, and Sergey I. Bozhevolnyi "Dynamic electro-optic reflective metasurfaces", Proc. SPIE PC12130, Metamaterials XIII, PC121301I (30 May 2022); https://doi.org/10.1117/12.2621605

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