Surface acoustic wave modulation of quantum cascade lasers

J. D. Cooper; Z. Ikonić; J. E. Cunningham; P. Harrison; M. Salih; A. G. Davies; E. H. Linfield

doi:10.1109/CAOL.2013.6657513

Surface acoustic wave modulation of quantum cascade lasers

J. D. Cooper, Z. Ikonić, J. E. Cunningham, P. Harrison, M. Salih, A. G. Davies, E. H. Linfield

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

1 Citation (Scopus)

Abstract

In this work, a description is given of a simulation technique employed to model the interaction between surface acoustic waves and ridge-waveguide quantum cascade lasers (QCLs). Firstly, a finite-difference time-domain (FDTD) scheme for modelling acoustic wave propagation in arbitrary semiconductor structures is outlined, and verified by comparison with experimental measurements of the frequency response of surface acoustic wave transmission between interdigitated transmitters and receivers on a bulk crystal. The model is developed further to represent the ridge-waveguide as a prominence above the surface and the active region of the laser is accounted for by a free-charge region buried within the structure. The modulation of this free charge, or carrier concentration by the propagating surface acoustic wave, is then used as an input to a rate equation model of a QCL to show how the gain will be affected. It is this control of the gain through the amplitude of the surface acoustic wave which will allow for modulation of the mid-infrared or terahertz output of the laser and hence its incorporation in many new applications.

Original language	English
Title of host publication	Conference Proceedings - 6th International Conference on Advanced Optoelectronics and Lasers, CAOL 2013
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	22-24
Number of pages	3
ISBN (Electronic)	9781479900183, 9781479900169, 9781479900176
DOIs	https://doi.org/10.1109/CAOL.2013.6657513
Publication status	Published - 7 Nov 2013
Externally published	Yes
Event	6th International Conference on Advanced Optoelectronics and Lasers - Sudak, Ukraine Duration: 9 Sep 2013 → 13 Sep 2013 Conference number: 6

Publication series

Name	International Conference on Advanced Optoelectronics and lasers
Publisher	IEEE
ISSN (Print)	2160-1518
ISSN (Electronic)	2160-1534

Conference

Conference	6th International Conference on Advanced Optoelectronics and Lasers
Abbreviated title	CAOL 2013
Country/Territory	Ukraine
City	Sudak
Period	9/09/13 → 13/09/13

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10.1109/CAOL.2013.6657513Licence: Unspecified

Cite this

Cooper, J. D., Ikonić, Z., Cunningham, J. E., Harrison, P., Salih, M., Davies, A. G., & Linfield, E. H. (2013). Surface acoustic wave modulation of quantum cascade lasers. In Conference Proceedings - 6th International Conference on Advanced Optoelectronics and Lasers, CAOL 2013 (pp. 22-24). [6657513] (International Conference on Advanced Optoelectronics and lasers). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CAOL.2013.6657513

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title = "Surface acoustic wave modulation of quantum cascade lasers",

abstract = "In this work, a description is given of a simulation technique employed to model the interaction between surface acoustic waves and ridge-waveguide quantum cascade lasers (QCLs). Firstly, a finite-difference time-domain (FDTD) scheme for modelling acoustic wave propagation in arbitrary semiconductor structures is outlined, and verified by comparison with experimental measurements of the frequency response of surface acoustic wave transmission between interdigitated transmitters and receivers on a bulk crystal. The model is developed further to represent the ridge-waveguide as a prominence above the surface and the active region of the laser is accounted for by a free-charge region buried within the structure. The modulation of this free charge, or carrier concentration by the propagating surface acoustic wave, is then used as an input to a rate equation model of a QCL to show how the gain will be affected. It is this control of the gain through the amplitude of the surface acoustic wave which will allow for modulation of the mid-infrared or terahertz output of the laser and hence its incorporation in many new applications.",

keywords = "Quantum cascade lasers, Surface acoustic waves, Modulation, Mathematical model, Distributed feedback devices, Surface impedance",

author = "Cooper, {J. D.} and Z. Ikoni{\'c} and Cunningham, {J. E.} and P. Harrison and M. Salih and Davies, {A. G.} and Linfield, {E. H.}",

year = "2013",

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doi = "10.1109/CAOL.2013.6657513",

language = "English",

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Cooper, JD, Ikonić, Z, Cunningham, JE, Harrison, P, Salih, M, Davies, AG & Linfield, EH 2013, Surface acoustic wave modulation of quantum cascade lasers. in Conference Proceedings - 6th International Conference on Advanced Optoelectronics and Lasers, CAOL 2013., 6657513, International Conference on Advanced Optoelectronics and lasers, Institute of Electrical and Electronics Engineers Inc., pp. 22-24, 6th International Conference on Advanced Optoelectronics and Lasers, Sudak, Ukraine, 9/09/13. https://doi.org/10.1109/CAOL.2013.6657513

Surface acoustic wave modulation of quantum cascade lasers. / Cooper, J. D.; Ikonić, Z.; Cunningham, J. E. et al.

Conference Proceedings - 6th International Conference on Advanced Optoelectronics and Lasers, CAOL 2013. Institute of Electrical and Electronics Engineers Inc., 2013. p. 22-24 6657513 (International Conference on Advanced Optoelectronics and lasers).

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

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AU - Cooper, J. D.

AU - Ikonić, Z.

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AU - Harrison, P.

AU - Salih, M.

AU - Davies, A. G.

AU - Linfield, E. H.

N1 - Conference code: 6

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Y1 - 2013/11/7

N2 - In this work, a description is given of a simulation technique employed to model the interaction between surface acoustic waves and ridge-waveguide quantum cascade lasers (QCLs). Firstly, a finite-difference time-domain (FDTD) scheme for modelling acoustic wave propagation in arbitrary semiconductor structures is outlined, and verified by comparison with experimental measurements of the frequency response of surface acoustic wave transmission between interdigitated transmitters and receivers on a bulk crystal. The model is developed further to represent the ridge-waveguide as a prominence above the surface and the active region of the laser is accounted for by a free-charge region buried within the structure. The modulation of this free charge, or carrier concentration by the propagating surface acoustic wave, is then used as an input to a rate equation model of a QCL to show how the gain will be affected. It is this control of the gain through the amplitude of the surface acoustic wave which will allow for modulation of the mid-infrared or terahertz output of the laser and hence its incorporation in many new applications.

AB - In this work, a description is given of a simulation technique employed to model the interaction between surface acoustic waves and ridge-waveguide quantum cascade lasers (QCLs). Firstly, a finite-difference time-domain (FDTD) scheme for modelling acoustic wave propagation in arbitrary semiconductor structures is outlined, and verified by comparison with experimental measurements of the frequency response of surface acoustic wave transmission between interdigitated transmitters and receivers on a bulk crystal. The model is developed further to represent the ridge-waveguide as a prominence above the surface and the active region of the laser is accounted for by a free-charge region buried within the structure. The modulation of this free charge, or carrier concentration by the propagating surface acoustic wave, is then used as an input to a rate equation model of a QCL to show how the gain will be affected. It is this control of the gain through the amplitude of the surface acoustic wave which will allow for modulation of the mid-infrared or terahertz output of the laser and hence its incorporation in many new applications.

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KW - Distributed feedback devices

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BT - Conference Proceedings - 6th International Conference on Advanced Optoelectronics and Lasers, CAOL 2013

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 6th International Conference on Advanced Optoelectronics and Lasers

Y2 - 9 September 2013 through 13 September 2013

ER -

Cooper JD, Ikonić Z, Cunningham JE, Harrison P, Salih M, Davies AG et al. Surface acoustic wave modulation of quantum cascade lasers. In Conference Proceedings - 6th International Conference on Advanced Optoelectronics and Lasers, CAOL 2013. Institute of Electrical and Electronics Engineers Inc. 2013. p. 22-24. 6657513. (International Conference on Advanced Optoelectronics and lasers). doi: 10.1109/CAOL.2013.6657513

Surface acoustic wave modulation of quantum cascade lasers

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