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Title: Active control and switching of broadband electromagnetically induced transparency in symmetric metadevices
Authors: Yahiaoui, Riad
Manjappa, Manukumara
Srivastava, Yogesh Kumar
Singh, Ranjan
Keywords: Semiconductor device fabrication
Coupled oscillators
Issue Date: 2017
Source: Yahiaoui, R., Manjappa, M., Srivastava, Y. K., & Singh, R. (2017). Active control and switching of broadband electromagnetically induced transparency in symmetric metadevices. Applied Physics Letters, 111(2), 021101-.
Series/Report no.: Applied Physics Letters
Abstract: Electromagnetically induced transparency (EIT) arises from coupling between the bright and dark mode resonances that typically involve subwavelength structures with broken symmetry, which results in an extremely sharp transparency band. Here, we demonstrate a tunable broadband EIT effect in a symmetry preserved metamaterial structure at the terahertz frequencies. Alongside, we also envisage a photo-active EIT effect in a hybrid metal-semiconductor metamaterial, where the transparency window can be dynamically switched by shining near-infrared light beam. A robust coupled oscillator model explains the coupling mechanism in the proposed design, which shows a good agreement with the observed results on tunable broadband transparency effect. Such active, switchable, and broadband metadevices could have applications in delay bandwidth management, terahertz filtering, and slow light effects.
ISSN: 0003-6951
DOI: 10.1063/1.4993428
Schools: School of Physical and Mathematical Sciences 
Research Centres: Center for Disruptive Photonic Technologies 
Rights: © 2017 American Institute of Physics (AIP). This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics (AIP). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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