Anisotropy of optical phonons in semiconductor superlattices: Raman scattering experiments

Ténné, D. A.; Gaısler, V. A.; Moshegov, N. T.; Toropov, A. I.; Shebanin, A. P.
July 1998
JETP Letters;7/1/98, Vol. 68 Issue 1, p53
Academic Journal
Experiments on Raman scattering in the “forward” geometry, permitting observation of anisotropy of the optical phonons, are performed on specially prepared short-period GaAs/AlAs superlattice structures with the substrates removed and the surfaces covered with an antireflective layer. The experimental data agree well with the computational results obtained for the angular dispersion of optical phonons in superlattices on the basis of a modified continuum model. © 1998 American Institute of Physics.


Related Articles

  • Abnormal selection rules of interface modes in ultrathin GaAs/AlAs superlattice. Zhang, S. L.; Zhang, J.; Yang, C. L.; Li, L. Y.; Zhang, L.; Planel, R. // Journal of Applied Physics;12/1/2000, Vol. 88 Issue 11, p6403 

    We observed a violation of the normal Raman selection rule in the resonant Raman spectra of interface (IF) phonon modes of the ultrathin (GaAs)[sub 4]/(AlAs)[sub 2] superlattice. Contrary to the prediction of conventional theories, all four IF modes were observed in both (XX) and (XY)...

  • Acoustic phonon peak splitting and satellite lines in Raman spectra of semiconductor superlattices. Zhang, P.X.; Lockwood, D.J.; Baribeau, J.-M. // Applied Physics Letters;1/18/1993, Vol. 62 Issue 3, p267 

    Investigates the acoustic phonon peak splitting and satellite lines in the Raman spectra of semiconductor superlattices. Measurement of the Raman spectra; Causes of the phonon peak splittings; Techniques used for the study and characterization of the superlattices.

  • Raman scattering by folded longitudinal acoustic phonons in InAs/GaSb superlattices: Resonant.... Wagner, J.; Schmitz, J. // Applied Physics Letters;6/19/1995, Vol. 66 Issue 25, p3498 

    Investigates backfolded longitudinal acoustic (LA) phonons in indium arsenide and gallium antimonide superlattices (SL). Enhancement of the Raman scattering by folded LA phonons; Rise of the difference in frequency with decreasing superlattice period; Occurrence of the folded LA phonons at...

  • Raman scattering by longitudinal acoustic phonons in metallic W/Ti Fibonacci superlattice. Pan, F. M.; Jin, G. J.; Wu, X. L.; Feng, J. W.; Hu, A.; Jiang, S. S. // Journal of Applied Physics;10/1/1996, Vol. 80 Issue 7, p4063 

    Investigates Raman scattering by longitudinal acoustic (LA) phonons in metallic tungsten/titanium Fibonacci superlattice. Experimental details; Details of light scattering by LA phonons; Findings of the study.

  • Raman scattering from square profile, sinusoidal profile, and tilted.... Johnson, F.G.; Wicks, G.W. // Applied Physics Letters;4/19/1993, Vol. 62 Issue 16, p1925 

    Examines the Raman spectra of aluminum and gallium-like optic phonons from Al[sub x]Ga[sub 1-x]As/Al[sub y]Ga[sub 1-y]As superlattices. Comparison between tilted and square profile superlattice; Examination of the tilted superlattice layer using the transmission electron microscopy; Use of...

  • Raman analysis of Si/Ge strained-layer superlattices under hydrostatic pressure. Zhifeng Sui; Herman, Irving P.; Bevk, Joze // Applied Physics Letters;5/27/1991, Vol. 58 Issue 21, p2351 

    Utilizes Raman scattering to study optical phonons in a Si[sub 12]Ge[sub 4] strained-layer superlattice on a c-Si(001) that was subjected to hydrostatic pressure at room temperature. Smaller change of phonon frequency with pressure than that for bulk crystalline Ge; Tuning of the biaxial strain...

  • Anomalies in the pressure response of the Raman modes in (211)-oriented.... Lemos, V.; Ritter, T. // Applied Physics Letters;9/21/1992, Vol. 61 Issue 12, p1417 

    Examines the phonon spectra of indium gallium arsenide/gallium arsenide strained-layer superlattices (SLS) by Raman scattering. Differences of phonon frequencies between (211)A and (211)B superlattices; Effect of the heterointerface mechanical stability on (211)A-oriented SLS; Detection of...

  • Phonon–Plasmon Interaction in Tunneling GaAs/AlAs Superlattices. Volodin, V. A.; Efremov, M. D.; Preobrazhenskiı, V. V.; Semyagin, B. R.; Bolotov, V. V.; Sachkov, V. A.; Galaktionov, E. A.; Kretinin, A. V. // JETP Letters;6/10/2000, Vol. 71 Issue 11, p477 

    The phonon–plasmon interaction in tunneling GaAs[sub n]/AlAs[sub m] superlattices (m = 5 and 6≥n≥0.6 monolayers) was studied by Raman scattering spectroscopy. The interaction of optical phonons localized in GaAs and AlAs layers with quasi-three-dimensional plasmons strengthens...

  • Raman scattering in Ga0.47In0.53As/InP superlattices grown by metalorganic vapor phase epitaxy. Davey, S. T.; Spurdens, P. C.; Wakefield, B.; Nelson, A. W. // Applied Physics Letters;9/7/1987, Vol. 51 Issue 10, p758 

    Raman scattering in two Ga0.47In0.53As/InP superlattices is reported. Scattering by folded longitudinal acoustic phonons has been observed and interpreted using the elastic continuum theory. The data yield superlattice periods of 18.0 and 12.1 nm. The optical phonon energies are observed to be...


Read the Article


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

Try another library?
Sign out of this library

Other Topics