Garufo, A, Sberna, PM, Carluccio, G et al. (9 more authors) (2019) A Connected Array of Coherent Photoconductive Pulsed Sources to Generate mW Average Power in the Submillimeter Wavelength Band. IEEE Transactions on Terahertz Science and Technology, 9 (3). pp. 221-236. ISSN 2156-342X
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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 IEEE. This is an author produced version of a paper published in IEEE Transactions on Terahertz Science and Technology. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Antenna arrays; Optical arrays; Laser beams; Bandwidth; Metallization; Optical pulses; Power lasers; Connected arrays; Photoconductivity; terahertz (THz) photoconductive antennas (PCAs); THz radiated power; THz sources; THz technology; THz time-domain measurements; ultrawideband arrays |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/P021859/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 02 Apr 2019 14:17 |
Last Modified: | 23 May 2019 12:58 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers |
Identification Number: | 10.1109/TTHZ.2019.2896791 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:144297 |