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narrow-band enhanced absorption of monolayer graphene at near-infrared (nir) sandwiched by dual gratings
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نویسنده
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zheng gaige ,zhang haojing ,bu lingbing
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منبع
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plasmonics - 2017 - دوره : 12 - شماره : 2 - صفحه:271 -276
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چکیده
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One possibility of enhancing light absorption in monolayer graphene at near-infrared (nir) wavelength region with grating structures is proposed and investigated. it is demonstrated that it is possible to achieve near-perfect absorption when a single monolayer graphene is sandwiched between two gratings with optimized geometric parameters at normal incidence for transverse electric (te) polarization. by means of the rigorous coupled-wave analysis (rcwa), the effects of technological tolerances on the optical response of the structure by varying geometric parameters and incident angle are studied. the proposed photonic structure could be efficiently exploited as a building block for innovative optical absorbers or photodetectors in combination with active materials.
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کلیدواژه
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monolayer graphene ,light absorption ,near-infrared ,rigorous coupled-wave analysis
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آدرس
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nanjing university of information science & technology, school of physics and optoelectronic engineering, jiangsu collaborative innovation center on atmospheric environment and equipment technology (cicaeet), china, nanjing university of information science & technology, school of physics and optoelectronic engineering, china, key laboratory of meteorological disaster of ministry of education, nanjing university of information science and technology, china
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Authors
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