Print Email Facebook Twitter Fabrication and Characterization of a Leaky Lens Photo-Conductive Antenna on Low Temperature Grown GaAs Membranes Title Fabrication and Characterization of a Leaky Lens Photo-Conductive Antenna on Low Temperature Grown GaAs Membranes Author Bueno Lopez, J. (TU Delft Electronics) Sberna, P.M. (TU Delft EKL Processing) Fiorellini Bernardis, A. (TU Delft Tera-Hertz Sensing) Zhang, H. (TU Delft Tera-Hertz Sensing) Neto, A. (TU Delft Tera-Hertz Sensing) Llombart, Nuria (TU Delft Tera-Hertz Sensing) Date 2023 Abstract State-of-the-art THz pulsed commercial systems operating over large bandwidth suffer from high dispersion or low radiation efficiency due to the poor coupling between the transmitter and receiver photoconductive antennas (PCAs). In this work, we present the fabrication and characterization of a leaky-lens PCA that has the potential to solve this problem. The presented PCA is based on a low-temperature grown gallium arsenide (LT-GaAs) membrane with a 1:15 bandwidth coverage (0.1-1.5 THz), where the frequency response is constant. In order to fabricate the PCA on an LT-GaAs membrane, a novel fabrication process is developed. This process is dramatically faster than previously used processes (∼1.5 h instead of ∼20 h). Furthermore, an experimental validation of the radiated power together with the comparison to a standard bow-tie-based PCA fabricated on the same LT-GaAs wafer is shown in this article. We show that the PCA source on the LT-GaAs membrane is more efficient due to the enhanced leaky wave radiation. The leaky-lens PCA stands out as a great candidate to improve the coupling efficiency in THz pulsed commercial systems, where the maximum laser power that can be used is limited by the dispersion in the optic fiber. Subject leaky lens antennamembrane-based micro-antennaphoto-conductive antennaTHz radiationTime domain spectroscopy To reference this document use: http://resolver.tudelft.nl/uuid:33babda2-9bab-491c-a757-69aa8ea582f5 DOI https://doi.org/10.1109/TTHZ.2023.3281770 Embargo date 2024-03-05 ISSN 2156-342X Source IEEE Transactions on Terahertz Science and Technology, 13 (5), 431-439 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2023 J. Bueno Lopez, P.M. Sberna, A. Fiorellini Bernardis, H. Zhang, A. Neto, Nuria Llombart Files PDF Fabrication_and_Character ... branes.pdf 2.95 MB Close viewer /islandora/object/uuid:33babda2-9bab-491c-a757-69aa8ea582f5/datastream/OBJ/view