INSTITUTIONAL DIGITAL REPOSITORY

Graphene‑based tunable multi‑band metamaterial polarization‑insensitive absorber for terahertz applications

Show simple item record

dc.contributor.author Jain, P.
dc.contributor.author Bansal, S.
dc.contributor.author Prakash, K.
dc.contributor.author Sardana, N.
dc.contributor.author Gupta, N.
dc.contributor.author Kumar, S.
dc.contributor.author Singh, A.K.
dc.date.accessioned 2020-12-17T04:59:59Z
dc.date.available 2020-12-17T04:59:59Z
dc.date.issued 2020-12-17
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/1670
dc.description.abstract This paper presents a graphene-based tunable polarization-insensitive metamaterial absorber (MMA) at terahertz (THz) frequencies. The absorber consists of top patterned gold (Au) layer followed by single layer of graphene, dielectric spacer, and Au layer at bottom. The proposed MMA demonstrates multi-band absorption with the characteristics of both broadand dual-band absorption by optimizing dimensions (parametric analysis). Broad-band absorption reaches over 90% for the range of 4.57–6.45 THz with the relative absorption bandwidth of 34%, and the absorption peak at 6.86 and 7.20 THz having 98.9 and 95.2% absorption. The normalized impedance and constitutive electromagnetic parameters of the MMA are calculated using the Nicolson–Ross–Weir (NRW) method to validate the absorption rate. Furthermore, proposed absorber is polarization-insensitive upto 90° for transverse electric wave. The tunable characteristic of MMA is achieved by tuning the Fermi energy of graphene with the application of bias voltage. Accordingly, the proposed multi- and broad-band absorbers find its potential applications in spectroscopy detection, imaging, and sensing. en_US
dc.language.iso en_US en_US
dc.title Graphene‑based tunable multi‑band metamaterial polarization‑insensitive absorber for terahertz applications en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Advanced Search

Browse

My Account