Resonance Raman Scattering by Confined LO and TO Phonons in GaAs-AlAs Superlattices

A. K. Sood; J. Menéndez; M. Cardona; K. Ploog

doi:10.1103/PhysRevLett.54.2111

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Resonance Raman Scattering by Confined LO and TO Phonons in GaAs-AlAs Superlattices

A. K. Sood^*, J. Menéndez, M. Cardona, and K. Ploog

Max-Planck-Institut für Festkörperforschung, D-7000 Stuttgart 80, Federal Republic of Germany

^*On leave from Materials Science Laboratory, Reactor Research Center, Kalpakkam-603102, India.

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Phys. Rev. Lett. 54, 2111 – Published 13 May, 1985

DOI: https://doi.org/10.1103/PhysRevLett.54.2111

Abstract

It is shown that in GaAs-AlAs superlattices the confined longitudinal-optic Raman phonons created via either deformation-potential or Fröhlich electron-phonon interaction are different. This effect is demonstrated by comparison of resonance and off-resonance Raman spectra. Phonons of $A_{1}$ symmetry (point group $D_{2 d}$ ) dominate in resonance, while $B_{2}$ phonons are stronger in the off-resonance case. The resonance profile of the $A_{1}$ modes is discussed. We also report the observation of confined transverse-optic phonons under extremely resonant conditions.

Comments & Replies

Sood et al. Respond

A. K. Sood, J. Menéndez, M. Cardona, and K. Ploog

Phys. Rev. Lett. 56, 1753 (1986)

Comment on "Resonance Raman Scattering by Confined LO and TO Phonons in GaAs-AlAs Superlattices"

Bernard Jusserand and Daniel Paquet

Phys. Rev. Lett. 56, 1752 (1986)

References (21)

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[c1] R. Fuchs and K. L. Kliewer, Phys. Rev. 140, A2076 (1975)

[c2] W. E. Jones and R. Fuchs, Phys. Rev. B 4, 3581 (1971)

[c3] G. Kanellis, J. F. Morhange, and M. Balkanski, Phys. Rev. B 28, 3406 (1983)

[c4] B. Jusserand, D. Paquet, and A. Regreny, Phys. Rev. B 30, 6245 (1984)

[c5] S. K. Yip and Y. C. Chang, Phys. Rev. B 30, 7037 (1984)

[c6] G. Sai-Halasz, A. Pinczuk, P. Y. Yu, and L. Esaki, Solid State Commun. 25, 381 (1978) [4] R. Merlin et al., Appl. Phys. Lett. 36, 43 (1980) A. K. Sood et al., following Letter [Phys. Rev. Lett. 54, 2115 (1985)]

[c7] J. E. Zucker, A. Pinczuk, D. S. Chemla, A. Gossard, and W. Wiegmann, Phys. Rev. Lett. 53, 1280 (1984)

[c8] A. S. Barker, Jr., J. L. Merz, and A. C. Gossard, Phys. Rev. B 17, 3181 (1978)

[c9] W. Hayes and R. Loudon, Scattering of Light by Crystals (Wiley, New York, 1978)

[c10] M. Cardona, in Light Scattering in Solids II, edited by M. Cardona and G. Güntherodt, Topics in Applied Physics, Vol. 50 (Springer-Verlag, Berlin, 1982), p. 19

[c11] Sood et al., [6]

[c12] J. E. Zucker, A. Pinczuk, D. S. Chemla, A. Gossard, and W. Wiegmann, Phys. Rev. Lett. 51, 1293 (1983)

[c13] J. Menéndez and M. Cardona, Phys. Rev. B 31, 3696 (1985)

[c14] D. S. Chemla, Helv. Phys. Acta 56, 607 (1983)

[c15] C. Colvard, R. Merlin, M. V. Klein, and A. C. Gossard, Phys. Rev. Lett. 45, 298 (1980) C. Colvard et al., Phys. Rev. B 31, 2080 (1985)

[c16] A. A. Gogolin and E. I. Rashba, Solid State Commun. 19, 1177 (1976)

[c17] J. C. Phillips, J. Vac. Sci. Technol. 19, 545 (1981)

[c18] J. Menéndez, A. K. Sood, and M. Cardona, unpublished

[c19] D. Olego and M. Cardona, Phys. Rev. B 24, 1217 (1981)

[c20] K. C. Rustagi and W. Weber, Solid State Commun. 18, 673 (1976)

[c21] G. Dolling and J. L. T. Waugh, in Lattice Dynamics, edited by R. F. Wallis (Pergamon, London, 1965), p. 19

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Resonance Raman Scattering by Confined LO and TO Phonons in GaAs-AlAs Superlattices

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References (21)

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