Influence of interface roughness scattering on output characteristics of GaAs/AlGaAs quantum cascade laser in a magnetic field

In comparison with silicon (100) we argue that the silicon (111) surface is a surface with higher mobility and stronger Coulomb interaction effects. For the resistance of the two-dimensional electron gas we discuss the effects of a magnetic field parallel to the surface: for zero temperature we present theoretical results for the magnetoresistance of an electron gas at the surface of silicon (111) with a six-fold valley degeneracy. Impurity scattering and interface roughness scattering are taken into account. A recent study of a hydrogen-passivated silicon (111) surface showed a mobility proportional to the electron density. We present, using a model for neutral impurities, predictions for the magnetoresistance of this sample in a parallel magnetic field.

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Design of a ZnMnSe∕ZnMgSe spin-polarized terahertz quantum cascade laser tunable by magnetic field

Applied Physics Letters ◽

10.1063/1.2219423 ◽

2006 ◽

Vol 89 (1) ◽

pp. 011109 ◽

Cited By ~ 8

Author(s):

Ivana Savić ◽

Zoran Ikonić ◽

Nenad Vukmirović ◽

Dragan Indjin ◽

Paul Harrison ◽

...

Keyword(s):

Magnetic Field ◽

Quantum Cascade Laser ◽

Quantum Cascade ◽

Spin Polarized

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Control of Optical Gain in the Active Region of Quantum Cascade Laser by Strong Perpendicular Magnetic Field

Materials Science Forum - Current Research in Advanced Materials and Processes ◽

10.4028/0-87849-971-7.31 ◽

2005 ◽

pp. 31-36

Author(s):

J. Radovanović ◽

V. Milanović ◽

Z. Ikonić ◽

D. Indjin

Keyword(s):

Magnetic Field ◽

Active Region ◽

Quantum Cascade Laser ◽

Optical Gain ◽

Perpendicular Magnetic Field ◽

Quantum Cascade

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Quantum Cascade Lasers

Bands and Photons in III-V Semiconductor Quantum Structures ◽

10.1093/oso/9780198767275.003.0013 ◽

2020 ◽

pp. 491-526

Author(s):

Vurgaftman Igor

Keyword(s):

Quantum Cascade Lasers ◽

Threshold Current ◽

Threshold Current Density ◽

Interface Roughness ◽

Frequency Combs ◽

Quantum Cascade ◽

Wall Plug Efficiency ◽

Interface Roughness Scattering ◽

Cascade Lasers ◽

Considerable Detail

This chapter describes the most commonly used approaches for computing the band structure of active materials with intersubband optical transitions. The physics of quantum cascade lasers (QCLs) is discussed in detail, including the mechanisms that limit the threshold current density, threshold voltage, wall-plug efficiency, and temperature sensitivity of state-of-the-art devices. The important roles of phonon and interface roughness scattering in determining threshold are emphasized. The chapter also compares the performance of QCLs to other mid-IR lasers in considerable detail and makes some conclusions as to which sources are preferred depending on the emission wavelength and application. Finally, the physical principles of laser-based frequency combs, including self-starting frequency-modulated QCL combs, are discussed.

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