TY - JOUR
T1 - Electrically and Magnetically Biased Graphene-Based Cylindrical Waveguides
T2 - Analysis and Applications as Reconfigurable Antennas
AU - Correas-Serrano, Diego
AU - Gomez Diaz, Juan Sebastian
AU - Alu, Andrea
AU - Alvarez-Melcon, Alejandro
PY - 2015/11/1
Y1 - 2015/11/1
N2 - The propagation of surface waves along electrically and magnetically biased graphene-based cylindrical waveguides (GCWs) is investigated in detail. Analytical dispersion equations are derived for several GCW geometries, considering the presence of an inner metallic core and multiple (coaxial-like) graphene layers. The proposed formulation reveals a fundamental connection between surface plasmons found in GCWs/carbon nanotubes and planar graphene structures. Numerical results confirm the higher confinement of modes supported by GCWs compared with their planar counterparts, while keeping a similar level of losses. The proposed structure is applied to develop plasmonic reconfigurable dipole antennas in the low THz band, which provide higher radiation efficiency than current graphene-based radiators, without requiring the presence of bulky lenses. We envision that the proposed GCWs may find application in reconfigurable THz transceivers, near-field application, wireless interconnects, and sensing systems.
AB - The propagation of surface waves along electrically and magnetically biased graphene-based cylindrical waveguides (GCWs) is investigated in detail. Analytical dispersion equations are derived for several GCW geometries, considering the presence of an inner metallic core and multiple (coaxial-like) graphene layers. The proposed formulation reveals a fundamental connection between surface plasmons found in GCWs/carbon nanotubes and planar graphene structures. Numerical results confirm the higher confinement of modes supported by GCWs compared with their planar counterparts, while keeping a similar level of losses. The proposed structure is applied to develop plasmonic reconfigurable dipole antennas in the low THz band, which provide higher radiation efficiency than current graphene-based radiators, without requiring the presence of bulky lenses. We envision that the proposed GCWs may find application in reconfigurable THz transceivers, near-field application, wireless interconnects, and sensing systems.
KW - Graphene
KW - plasmonics
KW - reconfigurable antennas
KW - terahertz (THz)
UR - http://www.scopus.com/inward/record.url?scp=84960295974&partnerID=8YFLogxK
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U2 - 10.1109/TTHZ.2015.2472985
DO - 10.1109/TTHZ.2015.2472985
M3 - Article
AN - SCOPUS:84960295974
VL - 5
SP - 951
EP - 960
JO - IEEE Transactions on Terahertz Science and Technology
JF - IEEE Transactions on Terahertz Science and Technology
SN - 2156-342X
IS - 6
M1 - 7270352
ER -