Terahertz subwavelength sensing with bio-functionalized germanium fano-resonators
Autor(en): | Chavarin, Carlos Alvarado Hardt, Elena Skibitzki, Oliver Voss, Thomas Eissa, Mohammed Spirito, Davide Capellini, Giovanni Baldassarre, Leonetta Flesch, Julia Piehler, Jacob You, Changjiang Gruessing, Soenke Roemer, Friedhard Witzigmann, Bernd |
Stichwörter: | biosensing; DYNAMICS; Engineering; Engineering, Electrical & Electronic; fano resonances; RESONANCES; REVEALS; semiconductor plasmonics; SERUM-ALBUMIN; terahertz sensor; THZ | Erscheinungsdatum: | 2022 | Herausgeber: | WALTER DE GRUYTER GMBH | Journal: | FREQUENZ | Volumen: | 76 | Ausgabe: | 11-12 | Startseite: | 639 | Seitenende: | 650 | Zusammenfassung: | 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. |
ISSN: | 0016-1136 | DOI: | 10.1515/freq-2022-0078 |
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geprüft am 08.05.2024