Chavarin, Carlos Alvarado ; Hardt, Elena ; Skibitzki, Oliver ; Voss, Thomas ; Eissa, Mohammed ; Spirito, Davide ; Capellini, Giovanni ; Baldassarre, Leonetta ; Flesch, Julia ; Piehler, Jacob ; You, Changjiang ; Grüssing, Sönke ; Römer, Friedhard ; Witzigmann, Bernd (2023):
Terahertz subwavelength sensing with bio-functionalized germanium fano-resonators. (Publisher's Version)
In: Frequenz, 76 (11-12), pp. 639-650. ISSN 0016-1136,
DOI: 10.26083/tuprints-00023209,
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Item Type: | Article |
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Origin: | Secondary publication |
Status: | Publisher's Version |
Title: | Terahertz subwavelength sensing with bio-functionalized germanium fano-resonators |
Language: | English |
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. |
Journal or Publication Title: | Frequenz |
Volume of the journal: | 76 |
Issue Number: | 11-12 |
Place of Publication: | Darmstadt |
Uncontrolled Keywords: | biosensing, fano resonances, semiconductor plasmonics, terahertz sensor |
Classification DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 570 Biowissenschaften, Biologie 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
Divisions: | 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) |
Date Deposited: | 01 Mar 2023 10:12 |
Last Modified: | 01 Mar 2023 10:13 |
DOI: | 10.26083/tuprints-00023209 |
Corresponding Links: | |
URN: | urn:nbn:de:tuda-tuprints-232099 |
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/23209 |
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