Terahertz subwavelength sensing with bio-functionalized germanium fano-resonators

Chavarin CA, Hardt E, Skibitzki O, Voss T, Eissa M, Spirito D, Capellini G, Baldassarre L, Flesch J, Piehler J, You C, Gruessing S, Römer F, Witzigmann B (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Frequenz Walter de Gruyter

DOI: 10.1515/freq-2022-0078

Abstract

Localized Surface Plasmon Resonances (LSPR) based on highly doped semiconductors microstructures, such as antennas, can be engineered to exhibit resonant features at THz frequencies. In this work, we demonstrate plasmonic antennas with increased quality factor LSPRs from Fano coupling to dark modes. We also discuss the advances in the biofunctionalization of n-doped Ge antennas for specific protein immobilization and cell interfacing. Finally, albumin biolayers with a thickness of a few hundred nanometers are used to demonstrate the performance of the fano-coupled n-Ge antennas as sensors. A resonant change of over 10% in transmission, due to the presence of the biolayer, can be detected within a bandwidth of only 20 GHz.

Authors with CRIS profile

Friedhard Römer Professur für Optoelektronik Bernd Witzigmann Professur für Optoelektronik

Involved external institutions

Leibniz-Institut für innovative Mikroelektronik / IHP GmbH - Innovations for High Performance Microelectronics DE Germany (DE) Università degli studi "La Sapienza" IT Italy (IT) Universität Osnabrück DE Germany (DE) Universität Kassel DE Germany (DE)

How to cite

APA:

Chavarin, C.A., Hardt, E., Skibitzki, O., Voss, T., Eissa, M., Spirito, D.,... Witzigmann, B. (2022). Terahertz subwavelength sensing with bio-functionalized germanium fano-resonators. Frequenz. https://doi.org/10.1515/freq-2022-0078

MLA:

Chavarin, Carlos Alvarado, et al. "Terahertz subwavelength sensing with bio-functionalized germanium fano-resonators." Frequenz (2022).

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