TITLE

Direct observation of laser level occupation and injector coupling in undoped GaAs/(Al,Ga)As quantum-cascade structures

AUTHOR(S)
Schrottke, L.; Hey, R.; Grahn, H. T.
PUB. DATE
May 2004
SOURCE
Applied Physics Letters;5/31/2004, Vol. 84 Issue 22, p4535
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The occupation of the laser levels in an undoped GaAs/(Al,Ga)As quantum-cascade structure is directly detected by interband photoluminescence spectroscopy. The upper laser level and the injector state exhibit an anticrossing behavior with a splitting of about 10 meV, which is attributed to a strong coupling between them. The energy splitting matches well the oscillation period observed in recent, ultrafast, coherent electron-transport experiments by F. Eickemeyer et al. [Phys. Rev. Lett. 89, 047402 (2002)]. A comparison with the calculated transition energies qualitatively confirms the anticrossing behavior in the vicinity of the threshold field strength. Furthermore, the measured energy difference between the upper and lower laser level agrees with the lasing energies of a set of complete quantum-cascade lasers. At the same time, the variation of the lasing energies corresponds to the energy splitting between the upper laser level and the injector state. © 2004 American Institute of Physics.
ACCESSION #
13154671

 

Related Articles

  • Elastic force analysis of functional polymer submicron oscillators. Sun, Hong-Bo; Takada, Kenji; Kawata, Satoshi // Applied Physics Letters;11/5/2001, Vol. 79 Issue 19, p3173 

    We report in this letter an elastic force analysis of two-photon-polymerized submicron oscillators with spiral radius of 150 nm. A laser trapping force was first utilized to mechanically drive the spring of this small size. An overdamped oscillation was observed, according to which, the spring...

  • Spectroscopic assessment of LiTaO3:Tm3+ as a potential diode-pumped laser near 1.9mum. Sokolska, I.; Ryba-Romanowki, W. // Journal of Applied Physics;11/1/1998, Vol. 84 Issue 9, p5348 

    Presents information pertaining to the spectroscopic properties associated with the LiTaO3:Tm3+ single crystal which are relevant for the Tm3+ laser transition. Achievement of a laser operation around the 1.9mum; Role of the quasiphase-matching technique; What the gain coefficient curves implies.

  • Resonance capture of holes in modulation-doped n-AlGaAs/GaAs quantum well structures. Yaremenko, N. G.; Karachevtseva, M. V.; Strakhov, V. A. // Doklady Physics;Mar2011, Vol. 56 Issue 3, p150 

    The article presents a study on the effects of anticipated oscillations on the effectiveness of photoexcited carriers capture to the photoluminescence (PL) of aluminium gallium arsenide (AlGaAs)/Gallium arsenide (GaAs) quantum structures. The study used molecular-beam epitaxy to grow the...

  • Quality factors of qubit rotations in single semiconductor quantum dots. Wang, Q. Q.; Muller, A.; Bianucci, P.; Shih, C. K.; Xue, Q. K. // Applied Physics Letters;7/18/2005, Vol. 87 Issue 3, p031904 

    The quality factors of quantum bit (qubit) rotations in single self-assembled quantum dots were investigated using photoluminescence spectroscopy. Rotations with azimuthal angle [lowercase_phi_synonym] along the equator of the qubit sphere were implemented by varying the time delay between two...

  • Plasma oscillations in two-dimensional electron channel of a ring diode. Heidari Semiromi, E.; Ebrahimi, F.; Bagheri, M. // Journal of Applied Physics;12/15/2006, Vol. 100 Issue 12, p124502 

    We present an analytical approach based on the boundary conditions and complete set of orthonormal functions applied to Poisson’s equation coupled with the hydrodynamic electron transport equations for calculating the spectra of the plasma oscillations in two-dimensional electron channel...

  • Electron transport in low density alkane gases: Effects of chain length and flexibility. Floriano, M. Antonio; Gee, Norman; Freeman, Gordon R. // Journal of Chemical Physics;6/15/1986, Vol. 84 Issue 12, p6799 

    The Ramsauer–Townsend (RT) minimum in the electron momentum transfer cross section (σm) occurs at the same energy (ξRT=0.12±0.01 eV) in all n-alkanes from C2H6 to n-C10H22. The lack of dependence on chain length indicates that the electron being scattered interacts with a chain...

  • Probing diagonal laser transitions in InGaAs/AlInAs/InP quantum cascade lasers. Soulby, M. R.; Revin, D. G.; Commin, J. P.; Krysa, A. B.; Roberts, J. S.; Cockburn, J. W. // Journal of Applied Physics;Dec2009, Vol. 106 Issue 12, p123106-1 

    We report on the midinfrared broadband transmission spectroscopy measurements of a λ∼4.3 μm strain compensated In0.64Ga0.36As/Al0.58In0.42As/InP quantum cascade laser. A detailed experimental analysis of the electronic distribution for bias values below the laser threshold is...

  • Saturation effects and dip in the output spectrum of a single-mode laser. Radina, T. V. // Optics & Spectroscopy;Feb2009, Vol. 106 Issue 2, p293 

    It is shown that the dip in the power output spectrum of a single-mode laser is caused by the nonlinear interaction of waves with the laser medium and is independent of the type of the laser transition broadening. When the cavity mode frequency is tuned to the center of the gain curve, the laser...

  • Room-temperature photoluminescence excitation spectroscopy of Er[sup 3+] ions in Er- and... Kozanecki, A.; Przybylinska, H. // Applied Physics Letters;10/4/1999, Vol. 75 Issue 14, p2041 

    Discusses the room temperature photoluminescence excitation spectroscopy of erbium and yttrium codopling in silicon layers grown or deposited on silicon. Potential applications of planar optical devices integrated on silicon in optical communication systems; Room temperature photoluminescence...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics