TY - GEN
T1 - Hybrid Metal-Topological Insulator Terahertz Metasurface for Ultrasensitive Refractive Index Biosensing
AU - Pires, Tomas
AU - Han, Ruobin
AU - Karthikeyan, Vaithinathan
AU - Abohmra, Abdoalbaset
AU - Tahir, Farooq
AU - Abbas, Hasan
AU - Imran, Muhammad
AU - Abbasi, Qammer
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - Terahertz thin film Sensing systems lack sensitivity due to small interaction length between Terahertz waves and biological samples. Terahertz metasurfaces provide electromagnetic field confinement and strong light-matter interaction by exciting surface plasmon polaritons (SPP) at the interface between dielectric substrate and metal-based resonators. In this paper we propose a hybrid Terahertz metasurface based on a metal- topological insulator resonator for refractive index (RI) biosensing. 2D Dirac plasmon polaritons (DPP) can be excited in the Terahertz range in Bismuth Selenide (a topological insulator). By coupling the DPP in Bismuth Selenide to the SPP in Gold, a plasmon induced transparency (PIT) resonance is excited whereby only non-radiative losses are present. Through simulation the proposed metasurface has a high theoretical sensitivity of 683GHz/RI with a Q-factor of 6.55. Showing the possibility of using topological insulators as a material platform for Terahertz Metasurface Biosensors.
AB - Terahertz thin film Sensing systems lack sensitivity due to small interaction length between Terahertz waves and biological samples. Terahertz metasurfaces provide electromagnetic field confinement and strong light-matter interaction by exciting surface plasmon polaritons (SPP) at the interface between dielectric substrate and metal-based resonators. In this paper we propose a hybrid Terahertz metasurface based on a metal- topological insulator resonator for refractive index (RI) biosensing. 2D Dirac plasmon polaritons (DPP) can be excited in the Terahertz range in Bismuth Selenide (a topological insulator). By coupling the DPP in Bismuth Selenide to the SPP in Gold, a plasmon induced transparency (PIT) resonance is excited whereby only non-radiative losses are present. Through simulation the proposed metasurface has a high theoretical sensitivity of 683GHz/RI with a Q-factor of 6.55. Showing the possibility of using topological insulators as a material platform for Terahertz Metasurface Biosensors.
UR - https://www.scopus.com/pages/publications/85207063821
U2 - 10.1109/AP-S/INC-USNC-URSI52054.2024.10686427
DO - 10.1109/AP-S/INC-USNC-URSI52054.2024.10686427
M3 - Conference contribution
AN - SCOPUS:85207063821
T3 - IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
SP - 2787
EP - 2788
BT - 2024 IEEE International Symposium on Antennas and Propagation and INC/USNCURSI Radio Science Meeting, AP-S/INC-USNC-URSI 2024 - Proceedings
T2 - 2024 IEEE International Symposium on Antennas and Propagation and INC/USNCURSI Radio Science Meeting, AP-S/INC-USNC-URSI 2024
Y2 - 14 July 2024 through 19 July 2024
ER -