Electromagnetic local density of states in graphene-covered hyperbolic metamaterial

Chen-Cai Song, Tong-Biao Wang (), Qing-Hua Liao, Tian-Bao Yu and Nian-Hua Liu
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Chen-Cai Song: Nanchang University
Tong-Biao Wang: Nanchang University
Qing-Hua Liao: Nanchang University
Tian-Bao Yu: Nanchang University
Nian-Hua Liu: Institute for Advanced Study, Nanchang University

The European Physical Journal B: Condensed Matter and Complex Systems, 2017, vol. 90, issue 10, 1-6

Abstract: Abstract The electromagnetic local density of states (EM-LDOS) near the surface of a graphene-covered hyperbolic metamaterial consisting of a periodical array of silicon carbide (SiC) nanowires is investigated theoretically. A new peak from the contribution of the hyperbolic mode (HM) appears in the EM-LDOS spectrum besides two ordinary peaks which are from graphene plasmon and the coupling of graphene plasmon with surface phonon polaritons (SPhPs), respectively. When the filling volume of SiC over the total structure increases, the HM peak becomes narrow with a decreasing amplitudes. Comparing with the other two peaks, HM peak is not sensitive to the chemical potential of graphene. Furthermore, the effect of distance on EM-LDOS is also studied, both the graphene plasmon and HM play important role to EM-LDOS at smaller distance, while SPhPs dominates at larger distance.

Keywords: Solid; State; and; Materials (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1140/epjb/e2017-80407-x

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