Two-wavelength quantum cascade lasers with heterogeneous cascades

Axel Straub; Claire F. Gmachl; Trinesha S. Mosely; Raffaele Colombelli; Mariano Troccoli; Deborah L. Sivco; A. Michael Sergent; Federico Capasso; Alfred Y. Cho

doi:10.1109/COMMAD.2002.1237212

Two-wavelength quantum cascade lasers with heterogeneous cascades

Axel Straub, Claire F. Gmachl, Trinesha S. Mosely, Raffaele Colombelli, Mariano Troccoli, Deborah L. Sivco, A. Michael Sergent, Federico Capasso, Alfred Y. Cho

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

3 Scopus citations

Abstract

Quantum cascade (QC) lasers with a dual-wavelength interdigitated cascade are presented. Their active core consists of a stack of active regions and injectors emitting at 8.0 μm interleaved with a second stack emitting at 9, 5 μm. Laser action at two substantially different wavelengths is observed, demonstrating the viability of the "interdigitated cascade" approach for multi-wavelengti laser emission in the mid-infrared. This laser was also used to investigate the influence of the injector-doping on the device perfomance. Two QC lasers with different injector-doping levels were measured, in particular one only doped in the injectors bridging the 8.0 μm active region to the 9.5 μm active region and the remaining injectors undoped. A substantial reduction in threshold was observed for the laser wavelength with the undoped injector, confirming the significance of impurity scattering for the laser threshold in QC-lasers. Dual single-mode and tunable emission at two substantially different wavelength could be demonstrated with a QC laser emitting at 5.0 μm and 7.5 μm simultaneously. These lasers may be of interest for trace gas sensing, as the second wavelength could be used as in-built reference channel.

Original language	English (US)
Title of host publication	2002 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002 - Proceedings
Editors	Michael Gal
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	141-144
Number of pages	4
ISBN (Electronic)	0780375718
DOIs	https://doi.org/10.1109/COMMAD.2002.1237212
State	Published - Jan 1 2002
Externally published	Yes
Event	Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002 - Sydney, Australia Duration: Dec 11 2002 → Dec 13 2002

Publication series

Name	Conference on Optoelectronic and Microelectronic Materials and Devices, Proceedings, COMMAD
Volume	2002-January

Other

Other	Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002
Country/Territory	Australia
City	Sydney
Period	12/11/02 → 12/13/02

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

Access to Document

10.1109/COMMAD.2002.1237212

Cite this

Straub, A., Gmachl, C. F., Mosely, T. S., Colombelli, R., Troccoli, M., Sivco, D. L., Sergent, A. M., Capasso, F., & Cho, A. Y. (2002). Two-wavelength quantum cascade lasers with heterogeneous cascades. In M. Gal (Ed.), 2002 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002 - Proceedings (pp. 141-144). [1237212] (Conference on Optoelectronic and Microelectronic Materials and Devices, Proceedings, COMMAD; Vol. 2002-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/COMMAD.2002.1237212

Straub, Axel ; Gmachl, Claire F. ; Mosely, Trinesha S. et al. / Two-wavelength quantum cascade lasers with heterogeneous cascades. 2002 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002 - Proceedings. editor / Michael Gal. Institute of Electrical and Electronics Engineers Inc., 2002. pp. 141-144 (Conference on Optoelectronic and Microelectronic Materials and Devices, Proceedings, COMMAD).

@inproceedings{10c674ab277b4b0a85bf59be4fa3d720,

title = "Two-wavelength quantum cascade lasers with heterogeneous cascades",

abstract = "Quantum cascade (QC) lasers with a dual-wavelength interdigitated cascade are presented. Their active core consists of a stack of active regions and injectors emitting at 8.0 μm interleaved with a second stack emitting at 9, 5 μm. Laser action at two substantially different wavelengths is observed, demonstrating the viability of the {"}interdigitated cascade{"} approach for multi-wavelengti laser emission in the mid-infrared. This laser was also used to investigate the influence of the injector-doping on the device perfomance. Two QC lasers with different injector-doping levels were measured, in particular one only doped in the injectors bridging the 8.0 μm active region to the 9.5 μm active region and the remaining injectors undoped. A substantial reduction in threshold was observed for the laser wavelength with the undoped injector, confirming the significance of impurity scattering for the laser threshold in QC-lasers. Dual single-mode and tunable emission at two substantially different wavelength could be demonstrated with a QC laser emitting at 5.0 μm and 7.5 μm simultaneously. These lasers may be of interest for trace gas sensing, as the second wavelength could be used as in-built reference channel.",

author = "Axel Straub and Gmachl, {Claire F.} and Mosely, {Trinesha S.} and Raffaele Colombelli and Mariano Troccoli and Sivco, {Deborah L.} and Sergent, {A. Michael} and Federico Capasso and Cho, {Alfred Y.}",

year = "2002",

month = jan,

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doi = "10.1109/COMMAD.2002.1237212",

language = "English (US)",

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editor = "Michael Gal",

booktitle = "2002 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002 - Proceedings",

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Straub, A, Gmachl, CF, Mosely, TS, Colombelli, R, Troccoli, M, Sivco, DL, Sergent, AM, Capasso, F & Cho, AY 2002, Two-wavelength quantum cascade lasers with heterogeneous cascades. in M Gal (ed.), 2002 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002 - Proceedings., 1237212, Conference on Optoelectronic and Microelectronic Materials and Devices, Proceedings, COMMAD, vol. 2002-January, Institute of Electrical and Electronics Engineers Inc., pp. 141-144, Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002, Sydney, Australia, 12/11/02. https://doi.org/10.1109/COMMAD.2002.1237212

Two-wavelength quantum cascade lasers with heterogeneous cascades. / Straub, Axel; Gmachl, Claire F.; Mosely, Trinesha S. et al.

2002 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002 - Proceedings. ed. / Michael Gal. Institute of Electrical and Electronics Engineers Inc., 2002. p. 141-144 1237212 (Conference on Optoelectronic and Microelectronic Materials and Devices, Proceedings, COMMAD; Vol. 2002-January).

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

TY - GEN

T1 - Two-wavelength quantum cascade lasers with heterogeneous cascades

AU - Straub, Axel

AU - Gmachl, Claire F.

AU - Mosely, Trinesha S.

AU - Colombelli, Raffaele

AU - Troccoli, Mariano

AU - Sivco, Deborah L.

AU - Sergent, A. Michael

AU - Capasso, Federico

AU - Cho, Alfred Y.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Quantum cascade (QC) lasers with a dual-wavelength interdigitated cascade are presented. Their active core consists of a stack of active regions and injectors emitting at 8.0 μm interleaved with a second stack emitting at 9, 5 μm. Laser action at two substantially different wavelengths is observed, demonstrating the viability of the "interdigitated cascade" approach for multi-wavelengti laser emission in the mid-infrared. This laser was also used to investigate the influence of the injector-doping on the device perfomance. Two QC lasers with different injector-doping levels were measured, in particular one only doped in the injectors bridging the 8.0 μm active region to the 9.5 μm active region and the remaining injectors undoped. A substantial reduction in threshold was observed for the laser wavelength with the undoped injector, confirming the significance of impurity scattering for the laser threshold in QC-lasers. Dual single-mode and tunable emission at two substantially different wavelength could be demonstrated with a QC laser emitting at 5.0 μm and 7.5 μm simultaneously. These lasers may be of interest for trace gas sensing, as the second wavelength could be used as in-built reference channel.

AB - Quantum cascade (QC) lasers with a dual-wavelength interdigitated cascade are presented. Their active core consists of a stack of active regions and injectors emitting at 8.0 μm interleaved with a second stack emitting at 9, 5 μm. Laser action at two substantially different wavelengths is observed, demonstrating the viability of the "interdigitated cascade" approach for multi-wavelengti laser emission in the mid-infrared. This laser was also used to investigate the influence of the injector-doping on the device perfomance. Two QC lasers with different injector-doping levels were measured, in particular one only doped in the injectors bridging the 8.0 μm active region to the 9.5 μm active region and the remaining injectors undoped. A substantial reduction in threshold was observed for the laser wavelength with the undoped injector, confirming the significance of impurity scattering for the laser threshold in QC-lasers. Dual single-mode and tunable emission at two substantially different wavelength could be demonstrated with a QC laser emitting at 5.0 μm and 7.5 μm simultaneously. These lasers may be of interest for trace gas sensing, as the second wavelength could be used as in-built reference channel.

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DO - 10.1109/COMMAD.2002.1237212

M3 - Conference contribution

AN - SCOPUS:84952661385

T3 - Conference on Optoelectronic and Microelectronic Materials and Devices, Proceedings, COMMAD

SP - 141

EP - 144

BT - 2002 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002 - Proceedings

A2 - Gal, Michael

PB - Institute of Electrical and Electronics Engineers Inc.

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Y2 - 11 December 2002 through 13 December 2002

ER -

Straub A, Gmachl CF, Mosely TS, Colombelli R, Troccoli M, Sivco DL et al. Two-wavelength quantum cascade lasers with heterogeneous cascades. In Gal M, editor, 2002 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2002 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2002. p. 141-144. 1237212. (Conference on Optoelectronic and Microelectronic Materials and Devices, Proceedings, COMMAD). doi: 10.1109/COMMAD.2002.1237212

Two-wavelength quantum cascade lasers with heterogeneous cascades

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