Print Email Facebook Twitter A Connected Array of Coherent Photoconductive Pulsed Sources to Generate mW Average Power in the Submillimeter Wavelength Band Title A Connected Array of Coherent Photoconductive Pulsed Sources to Generate mW Average Power in the Submillimeter Wavelength Band Author Garufo, A. (TNO) Sberna, P.M. (TU Delft EKL Equipment) Carluccio, G. (NXP Semiconductors) Freeman, Joshua R. (University of Leeds) Bacon, David R. (University of Leeds) Li, Lianhe (University of Leeds) Baselmans, J.J.A. (SRON Netherlands Institute for Space Research) Llombart, Nuria (TU Delft Tera-Hertz Sensing) Neto, A. (TU Delft Tera-Hertz Sensing) Date 2019 Abstract A pulsed photoconductive terahertz (THz) source is presented that is able to radiate milliwatt (mW) level average power over a large bandwidth, by exploiting both the optical and electrical properties of photoconductive sources and the ultrawideband properties of connected antenna arrays. An optical system composed of a microlenses array splits the laser beam into N×N spots that host the active excitation of the antenna arrays. An “ad hoc” network is introduced to bias the array active spots in order to implement a connected antenna array configuration. The array feeds a silicon lens to increase the directivity of the radiated THz beam. A dipole and a slot array are designed. Prototypes have been fabricated and measured. Power and spectrum measurements of the prototypes are in excellent agreement with the expected results. The proposed solutions achieve excellent power radiation levels by exploiting accurate electromagnetic design. Thus, they can offer enhancements to any active system relying on pulsed photoconductive antennas. Subject Antenna arraysBandwidthconnected arraysLaser beamsMetallizationOptical arraysOptical pulsesPhotoconductivityPower lasersTHz photoconductive antennasTHz radiated powerTHz sourcesTHz technologyTHz time-domain measurementsultra-wideband arrays To reference this document use: http://resolver.tudelft.nl/uuid:b6cb2302-2527-44e3-a59a-bd586ba948d9 DOI https://doi.org/10.1109/TTHZ.2019.2896791 ISSN 2156-342X Source IEEE Transactions on Terahertz Science and Technology, 9 (3), 221-236 Part of collection Institutional Repository Document type journal article Rights © 2019 A. Garufo, P.M. Sberna, G. Carluccio, Joshua R. Freeman, David R. Bacon, Lianhe Li, J.J.A. Baselmans, Nuria Llombart, A. Neto, More Authors Files PDF 52910066_08663355.pdf 5.11 MB Close viewer /islandora/object/uuid:b6cb2302-2527-44e3-a59a-bd586ba948d9/datastream/OBJ/view