Samenvatting
Antenna-coupled photomixers, serving as emitters and receivers of terahertz (THz) radiation, are the central active components of coherent optoelectronic THz systems. Here, we focus on the continuous-wave modality, which finds ample use for spectroscopy, sensing, and ranging and plays a major role in upcoming ultrahigh-frequency telecommunication applications. We demonstrate with planar receivers based on low-temperature-grown GaAs that the use of interdigital graphene electrodes instead of metal fingers enhances the responsivity by more than one order of magnitude. The increase in responsivity leads to a strongly enlarged dynamic range and doubles the frequency range covered in the detection process. We show by simulations that these improvements are a consequence of the transparency of the finger electrodes for visible/near-infrared laser radiation, which also activates the area under the fingers for the mixing process, not only their edges as in conventional devices with metal electrodes.
Originele taal-2 | Engels |
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Artikelnummer | 026103 |
Aantal pagina's | 8 |
Tijdschrift | APL Photonics |
Volume | 8 |
Nummer van het tijdschrift | 2 |
DOI's | |
Status | Gepubliceerd - 13 feb. 2023 |
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Duik in de onderzoeksthema's van 'Novel antenna-coupled terahertz photodetector with graphene nanoelectrodes'. Samen vormen ze een unieke vingerafdruk.Pers/Media
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Eindhoven University of Technology Researcher Discusses Research in Nanoelectronics (Novel antenna-coupled terahertz photodetector with graphene nanoelectrodes)
Al-Daffaie, S. & Jumaah, A.
27/02/23
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