TITLE

Optical saturation of intersubband absorption in GaAs-AlxGa1-xAs quantum wells

AUTHOR(S)
Julien, F. H.; Lourtioz, J.-M.; Herschkorn, N.; Delacourt, D.; Pocholle, J. P.; Papuchon, M.; Planel, R.; Le Roux, G.
PUB. DATE
July 1988
SOURCE
Applied Physics Letters;7/11/1988, Vol. 53 Issue 2, p116
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have investigated intersubband absorptions between the conduction ground state and the first excited state of two AlxGa1-xAs/GaAs/AlxGa1-xAs multiple quantum well structures with x=0.3 and 85 Å well width, and with x=0.57 and 96 Å well width. Small-signal measurements show absorption peaks at 10.45 and 10.15 μm, respectively. Under an intense resonant excitation from a pulsed CO2 laser, saturation of the intersubband absorption occurred. The saturation intensity is estimated to be 340±120 kW/cm2 for the first sample and 375±120 kW/cm2 for the second. From these values, we have deduced subband decay times of the order of 10.6±3.5 ps for the first sample and 15.5±5 ps for the second.
ACCESSION #
9827374

 

Related Articles

  • Effect of nonlinear wave mixing on ultrafast modulation of interband light in semiconductor quantum wells. Neogi, A. // JETP Letters;9/25/97, Vol. 66 Issue 6, p404 

    We investigate the effect of an induced sum-frequency signal on the transient modulation of interband-resonant probe light by a train of intersubband-resonant coupling light pulses in undoped quantum wells. The origin of the generated sum-frequency signal lies in the asymmetry of the three-level...

  • Tunneling Spectroscopy of Localized States near the Quantum Hall Edge. Alekseev, A.; Cheianov, V.; Dmitriev, A. P.; Kachorovskiı, V. Yu. // JETP Letters;9/25/2000, Vol. 72 Issue 6, p333 

    In this paper, we discuss the experimental results of M. Grayson etal. on tunneling I–V characteristics of the quantum Hall edge. We suggest a two-step tunneling mechanism involving localized electron states near the edge, which might account for the discrepancy between the experimental...

  • Structure and representations on the quantum supergroup OSP[sub q](2|2n). Zhang, R. B.; Zhang, R.B. // Journal of Mathematical Physics;Sep2000, Vol. 41 Issue 9 

    The structure and representations of the quantum supergroup OSP[sub q](2|2n) are studied systematically. The algebra of functions on the quantum supergroup, which specifies the quantum supergroup itself, is taken to be the superalgebra generated by the matrix elements of the vector...

  • Excitation spectra of a system of two coupled quantum wells. Lozovik, Yu. E.; Berman, O. L.; Panfilov, A. A. // Physics of the Solid State;Dec98, Vol. 40 Issue 12, p2021 

    Quasi-particle spectra, reconstructed by e-h pairing, have been calculated for a system of spatially separated electrons (e) and holes (h) in ground state. The regions of strong pairing interaction and significant correlation effects are reached by abandoning the BCS approximation and using...

  • Theory of single-mode lasing in coherent quantum cascade lasers. Elesin, V. F. // Journal of Experimental & Theoretical Physics;Aug97, Vol. 85 Issue 2, p264 

    A theory is developed for steady-state single-mode lasing in coherent quantum-well cascade lasers. This laser model is an example of a strictly quantum mechanical problem in which approximate kinetic approaches are not used to account for dissipative scattering processes. Exact wave functions...

  • Tunneling Time Between Two Biased Quantum Wells. Zhao, Xian-Geng; Zhu, Ming Jun // Modern Physics Letters B;6/10/99, Vol. 13 Issue 12/13, p385 

    We study the dynamics of double-well systems under the influence of time-dependent external fields. A tunneling time describing the coherent tunneling between two quantum wells is obtained analytically by the use of perturbation theory. We illustrate two examples to show the advantage of our...

  • Effects of strain in multiple quantum well distributed feedback lasers. Tanbun-Ek, T.; Logan, R. A.; Chu, S. N. G.; Sergent, A. M.; Wecht, K. W. // Applied Physics Letters;11/19/1990, Vol. 57 Issue 21, p2184 

    A survey of graded-index separate confinement multiple quantum well distributed feedback lasers comparing the effects of strain in the quantum well upon threshold, output power, and linewidth is reported. Lasers with either compressive or tensile strained quantum wells and a long cavity length...

  • Behavior of zone-center, subband energies in narrow, strongly coupled quantum wells. Biermann, Mark L.; Stroud Jr., C.R. // Applied Physics Letters;2/4/1991, Vol. 58 Issue 5, p505 

    Studies the behavior of zone-center, subband energies in narrow, strongly coupled quantum wells. Use of the pseudopotential method; Energy positions; Quantum-confined Stark effect; Design for devices and experiments.

  • Subpicosecond monolithic colliding-pulse mode-locked multiple quantum well lasers. Chen, Y.K.; Wu, M.C. // Applied Physics Letters;3/25/1991, Vol. 58 Issue 12, p1253 

    Studies subpicosecond monolithic colliding-pulse mode-locked multiple quantum well lasers. Generation of short optical pulses with semiconductor laser diodes; Generation of ultrafast subpicosecond optical pulse.

  • Independent and ambipolar tunneling in asymmetric-coupled quantum well structures. Tanguy, C.; Deveaud, B. // Applied Physics Letters;3/25/1991, Vol. 58 Issue 12, p1283 

    Studies independent and ambipolar tunneling in asymmetric-coupled quantum well structures. Femtosecond pump-probe transmission spectroscopy experiments on GaAS/AlGaAs asymmetric-coupled quantum wells; Single tunneling time at high densities.

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