{"id":"doi:10.1021/nl503104n","kind":"article","title":"Electrically Tunable Metasurface Perfect Absorbers for Ultrathin Mid-Infrared Optical Modulators","authors":["Yu Qin Yao","Raji Shankar","Mikhail A. Kats","Yi Song","Jing Kong","Marko Lončar","Federico Capasso"],"author_count":7,"year":2014,"published":"2014-10-13","venue":"Nano Letters","cited_by":830,"doi":"10.1021/nl503104n","arxiv_id":null,"nct_id":null,"source_url":"https://doi.org/10.1021/nl503104n","archive_url":"https://space-kitty.com/papers/doi:10.1021/nl503104n","updated":null,"pmid":"25310847","pmcid":null,"openalex_id":"W2331425463","pdf_url":null,"abstract":"Dynamically reconfigurable metasurfaces open up unprecedented opportunities in applications such as high capacity communications, dynamic beam shaping, hyperspectral imaging, and adaptive optics. The realization of high performance metasurface-based devices remains a great challenge due to very limited tuning ranges and modulation depths. Here we show that a widely tunable metasurface composed of optical antennas on graphene can be incorporated into a subwavelength-thick optical cavity to create an electrically tunable perfect absorber. By switching the absorber in and out of the critical coupling condition via the gate voltage applied on graphene, a modulation depth of up to 100% can be achieved. In particular, we demonstrated ultrathin (thickness < λ0/10) high speed (up to 20 GHz) optical modulators over a broad wavelength range (5-7 μm). The operating wavelength can be scaled from the near-infrared to the terahertz by simply tailoring the metasurface and cavity dimensions.","abstract_license":"CC-BY (publisher license, via OpenAlex)","license":"cc-by","is_open_access":true,"retracted":false,"peer_reviewed":null,"categories":["Metamaterials and Metasurfaces Applications"],"details":null,"provenance":"openalex","attribution":"Abstract of \"Electrically Tunable Metasurface Perfect Absorbers for Ultrathin Mid-Infrared Optical Modulators\" by Yu Qin Yao, Raji Shankar, Mikhail A. Kats et al., https://doi.org/10.1021/nl503104n, used under its Creative Commons Attribution license (CC-BY); markup removed, otherwise unmodified.","topics":[{"slug":"metamaterials-photonics","name":"Metamaterials, Nanophotonics & Integrated Photonics","domain_slug":"materials"}],"cited_in_dossiers":[]}