Population inversion by resonant magnetic confinement in terahertz quantum-cascade lasers

Scalari, Giacomo; Blaser, Stéphane; Ajiili, Lassaad; Faist, Jérôme; Beere, Harvey; Linfield, Edmund; Ritchie, David; Davies, Giles
October 2003
Applied Physics Letters;10/27/2003, Vol. 83 Issue 17, p3453
Academic Journal
Ultralow-threshold terahertz laser emission exploiting in-plane confinement arising from perpendicular magnetic field applied on a quantum-cascade structure is reported. A special design strategy has been adopted that takes advantage of the selective opening and closing of relaxation channels by elastic scattering between Landau levels. The key effect is a reduction of the lower state lifetime of the lasing transition that produces population inversion. The structure shows laser action only with applied magnetic field and yields threshold current densities as low as 19 A/cm[sup 2] at 4.2 K and 32 A/cm[sup 2] at 60 K at a frequency of 3.6 THz. © 2003 American Institute of Physics.


Related Articles

  • Nonradiative recombination and saturation of traps in multiple intrinsic quantum wells. Ding, Y. J.; Veliadis, J. V. D.; Khurgin, J. B. // Journal of Applied Physics;2/1/1994, Vol. 75 Issue 3, p1727 

    Presents a study which investigated the dependence of the continuous-wave photoluminescence on laser intensity in multiple intrinsic quantum wells. Examination of trap saturation; Formulation of carrier trapping and nonradiative recombination; Results and discussion.

  • High-speed spin-polarized intersubband lasers. Vurgaftman, I.; Meyer, J. R. // Journal of Applied Physics;11/1/1999, Vol. 86 Issue 9, p4734 

    Presents information on a study which proposed spin-polarized intersubband lasers based on optically pumped type-II antimonide quantum wells in a magnetic field. Interband and intersubband pumping configuration; Frequency response of spin-polarized intersubband lasers to a high-modulation...

  • Reduction of the field spectrum linewidth of a multiple quantum well laser in a high magnetic field—spectral properties of quantum dot lasers. Vahala, Kerry; Arakawa, Yasuhiko; Yariv, Amnon // Applied Physics Letters;2/16/1987, Vol. 50 Issue 7, p365 

    The field spectrum linewidth of a multiple quantum well laser immersed in a high magnetic field is measured at room temperature and at 165 K. The low-temperature measurements show a decrease of linewidth with increasing magnetic field. We believe this behavior results from the formation of a...

  • Ferromagnetic/DMS hybrid structures: one- and zero-dimensional magnetic traps for quasiparticles. Redliński, P.; Wojtowicz, T.; Rappoport, T. G.; Libal, A.; Furdyna, J. K.; Jankó, B. // AIP Conference Proceedings;2005, Vol. 772 Issue 1, p1291 

    We investigated possibility of using local magnetic field originating from ferromagnetic island deposited on the top of semiconductor quantum well to produce zero- and one-dimensional traps for quasi-particles with spin. In particular we considered two shapes of experimentally made magnets...

  • Suppression of intersubband nonradiative transitions by a magnetic field in quantum well laser devices. Blank, Alexander; Feng, Shechao // Journal of Applied Physics;10/1/1993, Vol. 74 Issue 7, p4795 

    Analyzes suppression of intersubband nonradiative transitions by a magnetic field in quantum well laser devices. Types of semiconductor lasers operating in the far-infrared range of the electromagnetic spectrum; Band diagram for the proposed multiple quantum well intersubband laser.

  • Nonlinear optical transitions of GaAs/AlGaAs asymmetric double-well structures. Kim, E. H.; Shin, Y. H.; Kim, Yongmin; Noh, S. J.; Perry, C. H.; Simmons, J. A.; Crooker, S. A.; Takamasu, T. // Applied Physics Letters;7/17/2006, Vol. 89 Issue 3, p032114 

    A thin AlGaAs barrier (2.5 nm) inserted into a GaAs/AlGaAs single heterojunction formed a square and a wedge-shaped triangular quantum well in the conduction band. In such a structure, the valence band does not have tunnel-coupled energy levels. Hence, the photogenerated valence holes tend to...

  • Wavelength and threshold current of a quantum well laser in a strong magnetic field. Berendschot, T. T. J. M.; Reinen, H. A. J. M.; Bluyssen, H. J. A.; Harder, C.; Meier, H. P. // Applied Physics Letters;5/8/1989, Vol. 54 Issue 19, p1827 

    The threshold current and the wavelength of a high-power ridge waveguide AlGaAs graded index separate confinement heterostructure quantum well laser have been studied in strong magnetic fields up to 20 T, to simulate the complete quantum confinement of carriers in a quantum box laser. It will be...

  • Magnetic-field-induced localization of electrons in InGaN/GaN multiple quantum wells. Arnaudov, B.; Paskova, T.; Valassiades, O.; Paskov, P.P.; Evtimova, S.; Monemar, B.; Heuken, M. // Applied Physics Letters;9/29/2003, Vol. 83 Issue 13, p2590 

    We study longitudinal electron transport in InGaN/GaN multiple quantum wells (MQWs) at moderate magnetic fields. We observe a stepwise behavior of both the Hall coefficient and magnetoresistivity. The peculiarities are explained by a magnetic-field-induced localization of electrons in a...

  • Magnetically tunable diluted magnetic semiconductor (Cd, Mn)Te quantum well laser. Isaacs, E. D.; Heiman, D.; Zayhowski, J. J.; Bicknell, R. N.; Schetzina, J. F. // Applied Physics Letters;1/27/1986, Vol. 48 Issue 4, p275 

    We report the first observation of strong magnetic field tuning of laser emission from Cd1-xMnxTe/Cd1-yMnyTe multiple quantum well structures. The spectral peak of the stimulated emission shifts to lower energy with increasing field at a rate of 3.4 meV/T to a maximum shift of 34 meV at 10 T....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics