Modeling of electron relaxation processes and the optical gain in a magnetic-field assisted THz quantum cascade laser
Апстракт
We present a detailed model for calculating the optical gain of a quantum cascade laser (QCL) that operates in the terahertz spectral range, when subjected to a strong magnetic field, as well as the total relaxation rates due to the emission of longitudinal-optical phonons and interface roughness scattering, as a function of the applied field. When the magnetic field is applied in the direction perpendicular to the plane of the layers, each energy state is split into a series of discrete Landau levels, which are magnetically tunable, and it is therefore possible to control the modulation of the population inversion and consequently the optical gain just by varying the magnetic field. In this model, the gain is obtained by solving the full system of rate equations, from which one can calculate the carrier density of each level. The simulations are performed on a system that comprises a two-well design QCL that operates at 4.6 THz, implemented in GaAs/Al0.15Ga0.85As. Numerical results ar...e presented for magnetic field values from 1.5 T up to 20 T, while the band non-parabolicity is taken into account.
Извор:
Physica Scripta, 2012, T149Финансирање / пројекти:
- Фотоника микро и нано структурних материјала (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45010)
- NATO SfP [ISEG.EAP.SFPP 984068]
Напомена:
- 3rd International School and Conference on Photonics, Aug 29-Sep 02, 2011, Belgrade, Serbia
DOI: 10.1088/0031-8949/2012/T149/014017
ISSN: 0031-8949; 1402-4896
WoS: 000303523500018
Scopus: 2-s2.0-84860470979
Колекције
Институција/група
VinčaTY - JOUR AU - Daničić, Aleksandar AU - Radovanović, Jelena V. AU - Indjin, Dragan AU - Ikonić, Zoran PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6949 AB - We present a detailed model for calculating the optical gain of a quantum cascade laser (QCL) that operates in the terahertz spectral range, when subjected to a strong magnetic field, as well as the total relaxation rates due to the emission of longitudinal-optical phonons and interface roughness scattering, as a function of the applied field. When the magnetic field is applied in the direction perpendicular to the plane of the layers, each energy state is split into a series of discrete Landau levels, which are magnetically tunable, and it is therefore possible to control the modulation of the population inversion and consequently the optical gain just by varying the magnetic field. In this model, the gain is obtained by solving the full system of rate equations, from which one can calculate the carrier density of each level. The simulations are performed on a system that comprises a two-well design QCL that operates at 4.6 THz, implemented in GaAs/Al0.15Ga0.85As. Numerical results are presented for magnetic field values from 1.5 T up to 20 T, while the band non-parabolicity is taken into account. T2 - Physica Scripta T1 - Modeling of electron relaxation processes and the optical gain in a magnetic-field assisted THz quantum cascade laser VL - T149 DO - 10.1088/0031-8949/2012/T149/014017 ER -
@article{ author = "Daničić, Aleksandar and Radovanović, Jelena V. and Indjin, Dragan and Ikonić, Zoran", year = "2012", abstract = "We present a detailed model for calculating the optical gain of a quantum cascade laser (QCL) that operates in the terahertz spectral range, when subjected to a strong magnetic field, as well as the total relaxation rates due to the emission of longitudinal-optical phonons and interface roughness scattering, as a function of the applied field. When the magnetic field is applied in the direction perpendicular to the plane of the layers, each energy state is split into a series of discrete Landau levels, which are magnetically tunable, and it is therefore possible to control the modulation of the population inversion and consequently the optical gain just by varying the magnetic field. In this model, the gain is obtained by solving the full system of rate equations, from which one can calculate the carrier density of each level. The simulations are performed on a system that comprises a two-well design QCL that operates at 4.6 THz, implemented in GaAs/Al0.15Ga0.85As. Numerical results are presented for magnetic field values from 1.5 T up to 20 T, while the band non-parabolicity is taken into account.", journal = "Physica Scripta", title = "Modeling of electron relaxation processes and the optical gain in a magnetic-field assisted THz quantum cascade laser", volume = "T149", doi = "10.1088/0031-8949/2012/T149/014017" }
Daničić, A., Radovanović, J. V., Indjin, D.,& Ikonić, Z.. (2012). Modeling of electron relaxation processes and the optical gain in a magnetic-field assisted THz quantum cascade laser. in Physica Scripta, T149. https://doi.org/10.1088/0031-8949/2012/T149/014017
Daničić A, Radovanović JV, Indjin D, Ikonić Z. Modeling of electron relaxation processes and the optical gain in a magnetic-field assisted THz quantum cascade laser. in Physica Scripta. 2012;T149. doi:10.1088/0031-8949/2012/T149/014017 .
Daničić, Aleksandar, Radovanović, Jelena V., Indjin, Dragan, Ikonić, Zoran, "Modeling of electron relaxation processes and the optical gain in a magnetic-field assisted THz quantum cascade laser" in Physica Scripta, T149 (2012), https://doi.org/10.1088/0031-8949/2012/T149/014017 . .