caa a22 4500 606243844 CHVBK 20210128101326.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s12596-014-0230-9 doi (NATIONALLICENCE)springer-10.1007/s12596-014-0230-9 Absorption enhancement of graphene Salisbury screen in the mid-infrared regime [Elektronische Daten] [Xiangxiao Ying, Yang Pu, Zhe Li, Zhijun Liu, Yadong Jiang] As an emerging optoelectronic material, graphene has exhibited negligible absorption in the mid-infrared due to its Drude-like behavior of free electrons. For this reason, existing graphene-based Salisbury screens with enhanced graphene absorption have been limited to terahertz frequencies, and are experiencing difficulty to extend to higher frequency region. We propose to utilize graphene interband conductivity instead of the commonly used intraband conductivity to realize graphene-based Salisbury screens in the mid-infrared. Distinct mid-infrared absorption features in graphene-based Salisbury screens are investigated numerically and analytically by means of transfer matrix method. In contrast to terahertz absorption arising from intraband transition, the enhanced absorption of graphene in the mid-infrared is dominated by the interband transition. For a single layer of graphene on top of a metallic plane, peak absorptions of 10% are obtained at normal incidence, and nearly perfect absorptions close to 1 are achieved at near grazing angle for incident s-polarization. To further enhance the perfect absorption over wider incident angles, a graphene-dielectric multilayer stack is proposed and analyzed. These results are relevant to graphene optoelectronics for mid-infrared applications. The Optical Society of India, 2014 Graphene nationallicence Salisbury screen nationallicence Optical absorption nationallicence Mid-infrared nationallicence Ying Xiangxiao School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut Pu Yang School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut Li Zhe School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut Liu Zhijun School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut Jiang Yadong School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut Journal of Optics Springer India 44/1(2015-03-01), 59-67 0972-8821 44:1<59 2015 44 12596 https://doi.org/10.1007/s12596-014-0230-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s12596-014-0230-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ying Xiangxiao School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut NATIONALLICENCE 700 1- Pu Yang School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut NATIONALLICENCE 700 1- Li Zhe School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut NATIONALLICENCE 700 1- Liu Zhijun School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut NATIONALLICENCE 700 1- Jiang Yadong School of Optoelectronic Information, University of Electronic Science and Technology of China, No. 4 Section 2 North Jianshe Road, 610054, Chengdu, Sichuan, China aut NATIONALLICENCE 773 0- Journal of Optics Springer India 44/1(2015-03-01), 59-67 0972-8821 44:1<59 2015 44 12596