High Sensitivity Terahertz Biosensor Based on Goos-Hänchen Effect in Graphene

Terahertz biosensing provides a suitable method to identify biomolecules due to their rich spectral fingerprint in this electromagnetic region. However, owing to the limitations of terahertz sources and detectors, the signal is weak and requires to be enhanced by particular technologies. In this pap...

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Veröffentlicht in:	IEEE photonics journal 2020-04, Vol.12 (2), p.1-6
Hauptverfasser:	Liu, Jiang-Yu, Huang, Tie-Jun, Yin, Li-Zheng, Han, Feng-Yuan, Liu, Pu-Kun
Format:	Artikel
Sprache:	eng
Schlagworte:	biological sensing Biomolecules Biosensors Computer simulation Dielectrics Goos-Hänchen effect Graphene Plasmons Refractive index Sensitivity
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creator	Liu, Jiang-Yu Huang, Tie-Jun Yin, Li-Zheng Han, Feng-Yuan Liu, Pu-Kun
description	Terahertz biosensing provides a suitable method to identify biomolecules due to their rich spectral fingerprint in this electromagnetic region. However, owing to the limitations of terahertz sources and detectors, the signal is weak and requires to be enhanced by particular technologies. In this paper, we propose a terahertz plasmonic biosensor based on Goos-Hänchen effect in graphene. Sample sensing can be realized by measuring the Goos-Hänchen shift of the reflected light. Numerical simulations show that the sensitivity of this biosensor can reach a high value up to 2.5 × 10 4 μm/RIU. This graphene plasmonic configuration combined with Goos-Hänchen effect provides a novel high-sensitivity approach for future terahertz biosensing applications.
doi_str_mv	10.1109/JPHOT.2020.2978107
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source	IEEE Open Access Journals; DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects	biological sensing Biomolecules Biosensors Computer simulation Dielectrics Goos-Hänchen effect Graphene Plasmons Refractive index Sensitivity
title	High Sensitivity Terahertz Biosensor Based on Goos-Hänchen Effect in Graphene
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