A theoretical model and a design of a magnetic-field tunable terahertz quantum well infrared photodetector are presented. The energy levels and the corresponding wave functions were computed from the envelope function Schrödinger equation using the effective-mass approximation and accounting for Landau quantization and the giant Zeeman effect induced by magnetic confinement. The electron dynamics were modeled within the self-consistent coupled rate equations approach, with all relevant electron-longitudinal-optical phonon and electron-longitudinal-acoustic phonon scatterings included. A perpendicular magnetic field varying between 0 and , at a temperature of , was found to enable a large shift of the detection energy, yielding a tuning range between 24.1 and , equivalent to wavelengths. For magnetic fields between 1 and , when the electron population of the quantum well infrared photodetector is spin polarized, a reasonably low dark current of and a large responsivity of are predicted.
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15 October 2005
Research Article|
October 26 2005
Magnetic-field tunable terahertz quantum well infrared photodetector
Ivana Savić;
Ivana Savić
a)
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 and 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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Vladimir D. Jovanović;
Vladimir D. Jovanović
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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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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a)
Electronic mail: eenis@leeds.ac.uk
J. Appl. Phys. 98, 084509 (2005)
Article history
Received:
June 21 2005
Accepted:
September 01 2005
Citation
Ivana Savić, Vitomir Milanović, Nenad Vukmirović, Vladimir D. Jovanović, Zoran Ikonić, Dragan Indjin, Paul Harrison; Magnetic-field tunable terahertz quantum well infrared photodetector. J. Appl. Phys. 15 October 2005; 98 (8): 084509. https://doi.org/10.1063/1.2085309
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