Nonequilibrium many body theory for quantum transport in terahertz quantum cascade lasers

Schmielau, T.; Pereira, M. F.
December 2009
Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p231111
Academic Journal
This paper presents a predictive Keldysh nonequilibrium many body Green’s functions theory for quantum transport including high order electron-electron, electron-phonon, electron-impurity, and interface roughness scattering processes. Our approach is fully frequency and momentum dependent including nondiagonal dephasing terms in both frequency and k-space. A detailed balance between coherent and scattering processes leads to local current conservation even if a small number of states is considered. Good agreement with experiments is obtained for a terahertz quantum cascade laser.


Related Articles

  • Nonequilibrium Green’s function calculation for four-level scheme terahertz quantum cascade lasers. Yasuda, H.; Kubis, T.; Vogl, P.; Sekine, N.; Hosako, I.; Hirakawa, K. // Applied Physics Letters;4/13/2009, Vol. 94 Issue 15, p151109 

    We have calculated the performance of a recently proposed four-level scheme terahertz quantum cascade laser (4L terahertz-QCL) with the nonequilibrium Green’s function method. The calculation result for 40 K showed that the 4L QCL has a larger terahertz gain than the conventional resonant...

  • Extraction-controlled quantum cascade lasers. Wacker, Andreas // Applied Physics Letters;8/23/2010, Vol. 97 Issue 8, p081105 

    A simple two-well design for terahertz quantum cascade lasers is proposed which is based on scattering injection and the efficient extraction of electrons from the lower laser level by resonant tunneling. In contrast to existing designs this extraction also controls the positive differential...

  • Localized Phonon States at the Edge of the Continuous Spectrum. Falkovsky, L. A. // Journal of Experimental & Theoretical Physics;Apr2000, Vol. 90 Issue 4, p639 

    An analysis is made of the influence of defects on the averaged Green's function of optical phonons whose imaginary part is proportional to the cross section for Raman one-phonon light scattering, which depends on the frequency transfer. A variant of the "cross" technique which can take into...

  • Fractional dynamics in the light scattering intensity fluctuation in dusty plasma. Muniandy, S. V.; Chew, W. X.; Wong, C. S. // Physics of Plasmas;Jan2011, Vol. 18 Issue 1, p013701 

    Light scattering intensity fluctuation in dusty plasma system is studied. The scattered electric field of the laser light is treated as a stationary stochastic process. A nonstandard form of fractional Langevin equation is solved using Green's function approach to obtain the so-called fractional...

  • A reflective optical transport system for ultraviolet Thomson scattering from electron plasma waves on OMEGA. Katz, J.; Boni, R.; Sorce, C.; Follett, R.; Shoup, M. J.; Froula, D. H. // Review of Scientific Instruments;Oct2012, Vol. 83 Issue 10, p10E349 

    A reflective optical transport system has been designed for the OMEGA Thomson-scattering diagnostic. A Schwarzschild objective that uses two concentric spherical mirrors coupled to a Pfund objective provides diffraction-limited imaging across all reflected wavelengths. This enables the operator...

  • Vibronic effects in off-resonant molecular wire conduction. Troisi, Alessandro; Ratner, Mark A.; Nitzan, Abraham // Journal of Chemical Physics;4/1/2003, Vol. 118 Issue 13, p6072 

    A model for the calculation of the inelastic contribution to the low-bias electron transport in molecular junctions is presented. It is an extension to the inelastic case of the Green's function approach to the calculation of the conduction of such systems. The model is suited for the...

  • Stimulated resonance scattering of light waves in laser crystals with a population inversion. Antipov, O. L.; Belyaev, S. I.; Kuzhelev, A. S. // JETP Letters;1/10/96, Vol. 63 Issue 1, p13 

    A new type of stimulated scattering of light is discovered in a Nd:YAG laser crystal with a population inversion. The scattering occurs for light at the resonance frequency of the laser transition, with a small anti-Stokes shift. It is shown that the effect is due to the appearance of a wave of...

  • Imaging backscattered and near to backscattered light in ignition scale plasmas (invited) Kirkwood, R. K.; Back, C. A.; Blain, M. A.; Desenne, D. E.; Dulieu, A. G.; Glenzer, S. H.; MacGowan, B. J.; Montgomery, D. S.; Moody, J. D. // Review of Scientific Instruments;Jan1997, Vol. 68 Issue 1, p636 

    Reports on diagnostics developed and fielded at the Nova laser facility that image nearly all the light scattered within 20 degrees of the laser axis. Ignition of inertial confinement fusion (ICF) plasmas; Spectral information; Design of the diagnostic; Calibration; Measurements of backscatter...

  • An automated light scattering system and a method for the in situ measurement of the index of refraction of soot particles. Charalampopoulos, T. T. // Review of Scientific Instruments;Sep87, Vol. 58 Issue 9, p1638 

    An automated laser light scattering system which uses a single detector to measure both classical and dynamic light scattering from soot particles in flames was designed, fabricated, and tested. Measurements of classical and dynamic light scattering along with extinction for a premixed...


Read the Article


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

Try another library?
Sign out of this library

Other Topics