Terahertz gain in a SiGe/Si quantum staircase utilizing the heavy-hole inverted effective mass

Soref, Richard A.; Sun, Gregory
November 2001
Applied Physics Letters;11/26/2001, Vol. 79 Issue 22, p3639
Academic Journal
Modeling and design studies show that a strain-balanced Si[sub 1-x]Ge[sub x]/Si superlattice on Si[sub 1-y]Ge[sub y]-buffered Si can be engineered to give an inverted effective mass HH2 subband adjacent to HH1, thereby enabling a 77 K edge-emitting electrically pumped p–i–p quantum staircase laser for THz emission at energies below the 37 meV Ge–Ge optical phonon energy. Analysis of hole-phonon scattering, lifetimes, matrix elements, and hole populations indicates that a gain of 450 cm[sup -1] will be feasible at f=7.3 THz during 1.7 kA/cm[sup 2] current injection. © 2001 American Institute of Physics.


Related Articles

  • Complete orthonormal sets on the past light cone. I. Functions belonging to mass zero and helicity s. Derrick, G. H. // Journal of Mathematical Physics;Mar1988, Vol. 29 Issue 3, p636 

    This is the first of a series of papers preparing the mathematical framework for a past light-cone formulation for the quantum mechanics of particles of arbitrary mass and spin. The aim of past light-cone quantum theory is to define quantum states solely in terms of data accessible to an...

  • Relationship between the gravitational constant and several quantum mechanical fundamental constants. Evans, Craig; Altenburg, Robert // Physics Essays;Jun2008, Vol. 21 Issue 2, p91 

    By assuming a three-body system for the hydrogen atom--electron, proton, and spherical Planck mass--and assuming that the electron and the proton are bare point charges, the following question arises: How far from the center of the spherical Planck mass will the electron have to orbit such that...

  • 3He-HeII Mixtures in the Static Approximation. Al-Sugheir, M. // International Journal of Theoretical Physics;Jun2004, Vol. 43 Issue 6, p1527 

    We have applied, for the first time, the so-called static approximation (SA) on the3He-HeII mixtures to calculate their thermodynamic properties under different conditions. For that, we have first obtained the so-called self-consistentlong-range-equation. The essence of this approximation is to...

  • Hidden Variables as Computational Tools: The Construction of a Relativistic Spinor Field. Holland, Peter // Foundations of Physics;Mar2006, Vol. 36 Issue 3, p369 

    Hidden variables are usually presented as potential completions of the quantum description. We describe an alternative role for these entities, as aids to calculation in quantum mechanics. This is illustrated by the computation of the time-dependence of a massless relativistic spinor field...

  • Effective mass and quantum lifetime in a Si/Si[sub 0.87]Ge[sub 0.13]/Si two-dimensional hole gas. Whall, T.E.; Mattey, N.L. // Applied Physics Letters;1/17/1994, Vol. 64 Issue 3, p357 

    Examines the effective mass and quantum lifetime in silicon compound two-dimensional hole gas. Application of oscillation measurements to determine the mass and quantum lifetime; Depiction of transport time ratio; Effect of interface roughness and short-range interface charge scattering on hole...

  • Scalar Mesons as q2q2? Insight from the Lattice. Alford, M.; Jaffe, R. L. // AIP Conference Proceedings;2003, Vol. 688 Issue 1, p208 

    I describe some insight obtained from a lattice calculation on the possibility that the light scalar mesons are q2q2 states rather than qq. First I review some general features of q2q2 states in QCD inspired quark models. Then I describe a lattice QCD calculation of pseudoscalar meson scattering...

  • Calculations of scattering of N2 molecules from Ru(0001). Ambaye, Hailemariam; Manson, J. R. // Journal of Chemical Physics;11/7/2006, Vol. 125 Issue 17, p176101 

    Recent experimental measurements of state resolved scattering of nitrogen molecules from a Ru(0001) surface are discussed in comparison with a mixed quantum-classical theory that has given reasonable explanations for similar data on other systems. Acceptable agreement between data and...

  • A quantum law of inertia in superspace-time. Lasukov, V. // Russian Physics Journal;Jun2011, Vol. 54 Issue 1, p39 

    It is shown that in superspace-time, the quantum law of inertia of a Planckian particle is significantly modified due to its gravitational self-action.

  • Inertial and gravitational mass in quantum mechanics. Kajari, E.; Harshman, N. L.; Rasel, E. M.; Stenholm, S.; Süßmann, G.; Schleich, W. P. // Applied Physics B: Lasers & Optics;Jul2010, Vol. 100 Issue 1, p43 

    We show that in complete agreement with classical mechanics, the dynamics of any quantum mechanical wave packet in a linear gravitational potential involves the gravitational and the inertial mass only as their ratio. In contrast, the spatial modulation of the corresponding energy wave function...


Read the Article


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

Try another library?
Sign out of this library

Other Topics