Inter-Landau Level Scattering Processes in Magnetic Field Assisted THz Quantum Cascade Laser
Апстракт
We present a detailed analysis of GaAs/AlGaAs terahertz quantum cascade laser in the presence of an intense external magnetic field. One of the objectives in further development of THz quantum cascade laser is the realization of structures operating at higher temperatures. This is difficult to obtain as the operating photon emission energy is smaller than the longitudinal-optical phonon energy in the semiconductor material. With increased temperature, electrons in the upper radiative state gain sufficient in-plane energy to emit an longitudinal-optical phonon, which represents a non-radiative scattering and reduces the optical gain. By applying strong magnetic field, two-dimensional continuous energy subbands become split into series of discrete Landau levels, and at particular values of B it is possible to quench these non-radiative channels. Numerical simulations are performed on two-well design quantum cascade laser operating at 4.6 THz, implemented in CaAs/Al(0.15)Ga(0.85)As, and t...he magnetic field is perpendicular to the epitaxial layers. Strong oscillations of carrier lifetimes for the upper state of the laser transition, as a function of magnetic field are observed, which can be attributed to interface roughness scattering and longitudinal-optical phonon scattering between Landau levels.
Извор:
Acta Physica Polonica A, 2011, 120, 2, 227-230Напомена:
- 12th Annual YUCOMAT Conference, Sep 06-10, 2010, Herceg Novi, Montenegro
DOI: 10.12693/APhysPolA.120.227
ISSN: 0587-4246
WoS: 000291836900005
Scopus: 2-s2.0-79960117882
Колекције
Институција/група
VinčaTY - JOUR AU - Radovanović, Jelena V. AU - Danici, A. AU - Milanović, Vitomir B. AU - Indjin, Dragan AU - Ikonić, Zoran PY - 2011 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6915 AB - We present a detailed analysis of GaAs/AlGaAs terahertz quantum cascade laser in the presence of an intense external magnetic field. One of the objectives in further development of THz quantum cascade laser is the realization of structures operating at higher temperatures. This is difficult to obtain as the operating photon emission energy is smaller than the longitudinal-optical phonon energy in the semiconductor material. With increased temperature, electrons in the upper radiative state gain sufficient in-plane energy to emit an longitudinal-optical phonon, which represents a non-radiative scattering and reduces the optical gain. By applying strong magnetic field, two-dimensional continuous energy subbands become split into series of discrete Landau levels, and at particular values of B it is possible to quench these non-radiative channels. Numerical simulations are performed on two-well design quantum cascade laser operating at 4.6 THz, implemented in CaAs/Al(0.15)Ga(0.85)As, and the magnetic field is perpendicular to the epitaxial layers. Strong oscillations of carrier lifetimes for the upper state of the laser transition, as a function of magnetic field are observed, which can be attributed to interface roughness scattering and longitudinal-optical phonon scattering between Landau levels. T2 - Acta Physica Polonica A T1 - Inter-Landau Level Scattering Processes in Magnetic Field Assisted THz Quantum Cascade Laser VL - 120 IS - 2 SP - 227 EP - 230 DO - 10.12693/APhysPolA.120.227 ER -
@article{ author = "Radovanović, Jelena V. and Danici, A. and Milanović, Vitomir B. and Indjin, Dragan and Ikonić, Zoran", year = "2011", abstract = "We present a detailed analysis of GaAs/AlGaAs terahertz quantum cascade laser in the presence of an intense external magnetic field. One of the objectives in further development of THz quantum cascade laser is the realization of structures operating at higher temperatures. This is difficult to obtain as the operating photon emission energy is smaller than the longitudinal-optical phonon energy in the semiconductor material. With increased temperature, electrons in the upper radiative state gain sufficient in-plane energy to emit an longitudinal-optical phonon, which represents a non-radiative scattering and reduces the optical gain. By applying strong magnetic field, two-dimensional continuous energy subbands become split into series of discrete Landau levels, and at particular values of B it is possible to quench these non-radiative channels. Numerical simulations are performed on two-well design quantum cascade laser operating at 4.6 THz, implemented in CaAs/Al(0.15)Ga(0.85)As, and the magnetic field is perpendicular to the epitaxial layers. Strong oscillations of carrier lifetimes for the upper state of the laser transition, as a function of magnetic field are observed, which can be attributed to interface roughness scattering and longitudinal-optical phonon scattering between Landau levels.", journal = "Acta Physica Polonica A", title = "Inter-Landau Level Scattering Processes in Magnetic Field Assisted THz Quantum Cascade Laser", volume = "120", number = "2", pages = "227-230", doi = "10.12693/APhysPolA.120.227" }
Radovanović, J. V., Danici, A., Milanović, V. B., Indjin, D.,& Ikonić, Z.. (2011). Inter-Landau Level Scattering Processes in Magnetic Field Assisted THz Quantum Cascade Laser. in Acta Physica Polonica A, 120(2), 227-230. https://doi.org/10.12693/APhysPolA.120.227
Radovanović JV, Danici A, Milanović VB, Indjin D, Ikonić Z. Inter-Landau Level Scattering Processes in Magnetic Field Assisted THz Quantum Cascade Laser. in Acta Physica Polonica A. 2011;120(2):227-230. doi:10.12693/APhysPolA.120.227 .
Radovanović, Jelena V., Danici, A., Milanović, Vitomir B., Indjin, Dragan, Ikonić, Zoran, "Inter-Landau Level Scattering Processes in Magnetic Field Assisted THz Quantum Cascade Laser" in Acta Physica Polonica A, 120, no. 2 (2011):227-230, https://doi.org/10.12693/APhysPolA.120.227 . .