Compact all-quantum-dot-based tunable THz laser source


We demonstrate an ultracompact, room temperature, tunable terahertz (THz) generating laser source based on difference-frequency-driven photomixing in a coplanar stripline InAs/GaAs quantum-dot (QD) antenna pumped by a broadly tunable, high power, continuous wave InAs/GaAs QD laser diode in the double-grating quasi-Littrow configuration. The dual-wavelength QD laser operating in the 1150- 1301 nm wavelength region with a maximum output power of 280 mW and with tunable difference-frequency (277 GHz to 30 THz) was used to achieve tunable THz generation in the QD antenna with a photoconductive gap of 50 μm. The best THz output performance was observed at pump wavelengths around the first excited state of the InAs/GaAs QDs (∼1160 nm), where a maximum output power of 0.6 nW at 0.83 THz was demonstrated.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © 2017 IEEE. 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. Funding: EUFP7-ICT (FAST-DOT Project No. 224338 and NEXPRESSO program; RFBR (16-07-01166a); and EPSRC (EP/H015795/1).
Uncontrolled Keywords: antennas,laser tuning,optical mixers,photoconductive devices,quantum dots,semiconductor lasers,terahertz radiation,Atomic and Molecular Physics, and Optics,Electrical and Electronic Engineering
Publication ISSN: 1077-260X
Last Modified: 19 Feb 2024 08:14
Date Deposited: 04 Apr 2017 14:35
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2017-07
Published Online Date: 2016-12-01
Accepted Date: 2016-11-27
Authors: Fedorova, Ksenia A. (ORCID Profile 0000-0002-2765-9951)
Gorodetsky, Andrei
Rafailov, Edik U. (ORCID Profile 0000-0002-4152-0120)



Version: Accepted Version

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