The carrier dynamical issues for extending the operating wavelength of quantum cascade lasers into the Terahertz regime

P. Harrison; K. Donovan; R. W. Kelsall

doi:10.1109/LEOS.1999.811859

The carrier dynamical issues for extending the operating wavelength of quantum cascade lasers into the Terahertz regime

P. Harrison, K. Donovan, R. W. Kelsall

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The potential operating performance of Terahertz quantum cascade lasers are compared with contemporary shorter wavelength mid-infrared devices from the viewpoint of the carrier dynamics within the active region. It has been shown that the internal quantum efficiency for radiative transitions between two subbands in GaAs at Terahertz frequencies is greater at low temperatures than that at mid-infrared wavelengths. It is comparable at 77 K and less at room temperature. Furthermore the internal quantum efficiency is higher for vertical intrawell transitions than diagonal interwell transitions at Terahertz frequencies

Original language	English
Title of host publication	Proceedings of 12th IEEE Lasers and Electro-Optics Society Annual Meeting
Subtitle of host publication	LEOS 1999
Publisher	IEEE
Pages	578-579
Number of pages	2
Volume	2
ISBN (Electronic)	0780356365
ISBN (Print)	0780356349, 0780356357
DOIs	https://doi.org/10.1109/LEOS.1999.811859
Publication status	Published - 6 Aug 2002
Externally published	Yes
Event	12th Annual Meeting IEEE Lasers and Electro-Optics Society - San Francisco, United States Duration: 8 Nov 1999 → 11 Nov 1999 Conference number: 12

Publication series

Name	Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
Publisher	Institute of Electrical and Electronics Engineers Inc.
Volume	2
ISSN (Print)	1092-8081

Conference

Conference	12th Annual Meeting IEEE Lasers and Electro-Optics Society
Abbreviated title	LEOS'99
Country/Territory	United States
City	San Francisco
Period	8/11/99 → 11/11/99

Access to Document

10.1109/LEOS.1999.811859Licence: Unspecified

Cite this

Harrison, P., Donovan, K., & Kelsall, R. W. (2002). The carrier dynamical issues for extending the operating wavelength of quantum cascade lasers into the Terahertz regime. In Proceedings of 12th IEEE Lasers and Electro-Optics Society Annual Meeting: LEOS 1999 (Vol. 2, pp. 578-579). [811859] (Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS; Vol. 2). IEEE. https://doi.org/10.1109/LEOS.1999.811859

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abstract = "The potential operating performance of Terahertz quantum cascade lasers are compared with contemporary shorter wavelength mid-infrared devices from the viewpoint of the carrier dynamics within the active region. It has been shown that the internal quantum efficiency for radiative transitions between two subbands in GaAs at Terahertz frequencies is greater at low temperatures than that at mid-infrared wavelengths. It is comparable at 77 K and less at room temperature. Furthermore the internal quantum efficiency is higher for vertical intrawell transitions than diagonal interwell transitions at Terahertz frequencies",

keywords = "Quantum cascade lasers, Optical scattering, Particle scattering, Laser transitions, Pump lasers, Quantum well lasers, Temperature, Electron emission, Stimulated emission, Phonons",

author = "P. Harrison and K. Donovan and Kelsall, {R. W.}",

year = "2002",

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doi = "10.1109/LEOS.1999.811859",

language = "English",

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note = "12th Annual Meeting IEEE Lasers and Electro-Optics Society, LEOS'99 ; Conference date: 08-11-1999 Through 11-11-1999",

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Harrison, P, Donovan, K & Kelsall, RW 2002, The carrier dynamical issues for extending the operating wavelength of quantum cascade lasers into the Terahertz regime. in Proceedings of 12th IEEE Lasers and Electro-Optics Society Annual Meeting: LEOS 1999. vol. 2, 811859, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, vol. 2, IEEE, pp. 578-579, 12th Annual Meeting IEEE Lasers and Electro-Optics Society, San Francisco, California, United States, 8/11/99. https://doi.org/10.1109/LEOS.1999.811859

The carrier dynamical issues for extending the operating wavelength of quantum cascade lasers into the Terahertz regime. / Harrison, P.; Donovan, K.; Kelsall, R. W.

Proceedings of 12th IEEE Lasers and Electro-Optics Society Annual Meeting: LEOS 1999. Vol. 2 IEEE, 2002. p. 578-579 811859 (Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS; Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - The potential operating performance of Terahertz quantum cascade lasers are compared with contemporary shorter wavelength mid-infrared devices from the viewpoint of the carrier dynamics within the active region. It has been shown that the internal quantum efficiency for radiative transitions between two subbands in GaAs at Terahertz frequencies is greater at low temperatures than that at mid-infrared wavelengths. It is comparable at 77 K and less at room temperature. Furthermore the internal quantum efficiency is higher for vertical intrawell transitions than diagonal interwell transitions at Terahertz frequencies

KW - Quantum cascade lasers

KW - Optical scattering

KW - Particle scattering

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KW - Pump lasers

KW - Quantum well lasers

KW - Temperature

KW - Electron emission

KW - Stimulated emission

KW - Phonons

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Harrison P, Donovan K, Kelsall RW. The carrier dynamical issues for extending the operating wavelength of quantum cascade lasers into the Terahertz regime. In Proceedings of 12th IEEE Lasers and Electro-Optics Society Annual Meeting: LEOS 1999. Vol. 2. IEEE. 2002. p. 578-579. 811859. (Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS). doi: 10.1109/LEOS.1999.811859

The carrier dynamical issues for extending the operating wavelength of quantum cascade lasers into the Terahertz regime

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