A design of a magnetic field tunable terahertz quantum cascade laser is proposed. It relies on the spin-dependent potential induced by a magnetic field. The electron dynamics are calculated using the Boltzmann equation approach, with electron-longitudinal optical phonon, electron-longitudinal acoustic phonon, and electron-electron scattering included. Tunability of the emission energy between 10 and , and 38 and , for transitions of spin-down and spin-up electrons, respectively, may be achieved by varying a magnetic field up to , at a temperature of . Population inversion of up to 42% for spin-down and 27% for spin-up electrons is predicted, which in conjunction with the estimated waveguide losses, yields sufficient gain for laser operation.
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3 July 2006
Research Article|
July 06 2006
Design of a spin-polarized terahertz quantum cascade laser tunable by magnetic field
Ivana Savić;
Ivana Savić
a)
School of Electronic and Electrical Engineering,
University of Leeds
, Leeds LS2 9JT, United Kingdom
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Zoran Ikonić;
Zoran Ikonić
School of Electronic and Electrical Engineering,
University of Leeds
, Leeds LS2 9JT, United Kingdom
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Nenad Vukmirović;
Nenad Vukmirović
School of Electronic and Electrical Engineering,
University of Leeds
, Leeds LS2 9JT, United Kingdom
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Dragan Indjin;
Dragan Indjin
School of Electronic and Electrical Engineering,
University of Leeds
, Leeds LS2 9JT, United Kingdom
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Paul Harrison;
Paul Harrison
School of Electronic and Electrical Engineering,
University of Leeds
, Leeds LS2 9JT, United Kingdom
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Vitomir Milanović
Vitomir Milanović
Faculty of Electrical Engineering,
University of Belgrade
, 11120 Belgrade, Serbia and Montenegro
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a)
Electronic mail: eenis@leeds.ac.uk
Appl. Phys. Lett. 89, 011109 (2006)
Article history
Received:
March 14 2006
Accepted:
May 19 2006
Citation
Ivana Savić, Zoran Ikonić, Nenad Vukmirović, Dragan Indjin, Paul Harrison, Vitomir Milanović; Design of a spin-polarized terahertz quantum cascade laser tunable by magnetic field. Appl. Phys. Lett. 3 July 2006; 89 (1): 011109. https://doi.org/10.1063/1.2219423
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