Alam, Tasmim and Wienold, Martin and Lü, Xiang and Biermann, Klaus and Schrottke, Lutz and Grahn, Holger T. and Hübers, Heinz-Wilhelm (2019) Wideband, high-resolution terahertz spectroscopy by light-induced frequency tuning of quantum-cascade lasers. Optics Express, 27 (4), pp. 5420-5432. Optical Society of America. doi: 10.1364/OE.27.005420. ISSN 1094-4087.
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Official URL: https://doi.org/10.1364/OE.27.005420
Abstract
Near-infrared optical excitation enables wideband requency tuning of terahertz quantum-cascade lasers. In this work, we demonstrate the feasibility of the approach for molecular laser absorption spectroscopy. We present a physical model which explains the observed frequency tuning characteristics by the optical excitation of an electron-hole plasma. Due to an improved excitation configuration as compared to previous work, we observe a single-mode continuous-wave frequency coverage of as much as 40 GHz for a laser at 3.1 THz. This represents, for the same device, a ten-fold improvement over the usually employed tuning by current. The method can be readily applied to a large class of devices.
Item URL in elib: | https://elib.dlr.de/126573/ | ||||||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||||||
Title: | Wideband, high-resolution terahertz spectroscopy by light-induced frequency tuning of quantum-cascade lasers | ||||||||||||||||||||||||||||||||
Authors: |
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Date: | 18 February 2019 | ||||||||||||||||||||||||||||||||
Journal or Publication Title: | Optics Express | ||||||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||||||||||
Gold Open Access: | Yes | ||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||||||
Volume: | 27 | ||||||||||||||||||||||||||||||||
DOI: | 10.1364/OE.27.005420 | ||||||||||||||||||||||||||||||||
Page Range: | pp. 5420-5432 | ||||||||||||||||||||||||||||||||
Publisher: | Optical Society of America | ||||||||||||||||||||||||||||||||
ISSN: | 1094-4087 | ||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||
Keywords: | Quantenkaskadenlaser, Terahertz-Spektroskopie | ||||||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||||||||||||||||
HGF - Program Themes: | other | ||||||||||||||||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||||||||||||||||
DLR - Program: | R - no assignment | ||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | R - no assignment | ||||||||||||||||||||||||||||||||
Location: | Berlin-Adlershof | ||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy | ||||||||||||||||||||||||||||||||
Deposited By: | Wienold, Martin | ||||||||||||||||||||||||||||||||
Deposited On: | 21 Feb 2019 08:09 | ||||||||||||||||||||||||||||||||
Last Modified: | 22 Nov 2023 06:54 |
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