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ICOP & ICPET 2018, 24 - : 793-796 Back to browse issues page
Highly Flexible and Tunable Coherent Perfect Absorption in Graphene Metasurface at Wide Angle of Incidence in Terahertz Regime
Roya Ebrahimi Meymand * 1, Ali Soleymani 1, Nosrat. . Geranpayeh 1
1- Faculty of Electrical Engineering, K. N. Toosi University of Technology
Abstract:   (338 Views)
We exploit graphene square-ring to realize coherent perfect absorption (CPA) in the terahertz (THz) regime. The simulated results show a 90% absorption coefficient over a wide range of angles of incidence for both TE and TM radiations. The coherent absorptivity is tunable from nearly 0% to 100% by adjusting the relative phase of two low power counter-propagating coherent beams. The central frequency of the absorption simply can be tuned by varying the chemical potential of graphene and by changing the geometric parameters of metasurface. Thus, the proposed absorber is very promising for various optical applications as modulators, detectors and electromagnetic switches. This article offers a novel path for perfect absorption in THz gap, it should be noted that the thickness of proposed absorber is only about λ/4.
Keywords: Coherent perfect absorption, Graphene, Metasurface, Modulation, Terahertz
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Type of Study: Research | Subject: Special
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Ebrahimi Meymand R, Soleymani A, Geranpayeh N. Highly Flexible and Tunable Coherent Perfect Absorption in Graphene Metasurface at Wide Angle of Incidence in Terahertz Regime. ICOP & ICPET. 2018; 24 :793-796
URL: http://opsi.ir/article-1-1448-en.html


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انجمن اپتیک و فوتونیک ایران Optics and Photonics Society of Iran
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