Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/7502
Title: Electrically switchable metadevices via graphene
Authors: Balcı, Osman
Kakenov, Nurbek
Karademir, Ertuğrul
Balcı, Sinan
Çakmakyapan, Semih
Polat, Emre O.
Çağlayan, Hümeyra
Özbay, Ekmel
Kocabaş, Çoşkun
Balcı, Sinan
Izmir Institute of Technology. Photonics
Keywords: Electromagnetic waves
Graphene
Hybrid systems
Metamaterials
Issue Date: Jan-2018
Publisher: American Association for the Advancement of Science
Source: Balcı, O., Kakenov, N., Karademir, E., Balcı, S., Çakmakyapan, S., Polat, Emre O., Çağlayan, H., Özbay, E., and Kocabaş, Ç. (2018). Electrically switchable metadevices via graphene. Science Advances, 4(1). doi:10.1126/sciadv.aao1749
Abstract: Metamaterials bring subwavelength resonating structures together to overcome the limitations of conventional materials. The realization of active metadevices has been an outstanding challenge that requires electrically reconfigurable components operating over a broad spectrum with a wide dynamic range. However, the existing capability of metamaterials is not sufficient to realize this goal. By integrating passive metamaterials with active graphene devices, we demonstrate a new class of electrically controlled active metadevices working in microwave frequencies. The fabricated active metadevices enable efficient control of both amplitude (>50 dB) and phase (>90°) of electromagnetic waves. In this hybrid system, graphene operates as a tunable Drude metal that controls the radiation of the passive metamaterials. Furthermore, by integrating individually addressable arrays of metadevices, we demonstrate a new class of spatially varying digital metasurfaces where the local dielectric constant can be reconfigured with applied bias voltages. In addition, we reconfigure resonance frequency of split-ring resonators without changing its amplitude by damping one of the two coupled metasurfaces via graphene. Our approach is general enough to implement various metamaterial systems that could yield new applications ranging from electrically switchable cloaking devices to adaptive camouflage systems.
URI: https://doi.org/10.1126/sciadv.aao1749
https://hdl.handle.net/11147/7502
ISSN: 2375-2548
2375-2548
Appears in Collections:Photonics / Fotonik
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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