**Comment on ``Phase transtition of an exciton system in GaAs coupled quantum wells'' and on ``Fermi-Dirac distribution of excitons in coupled quantum wells''**

S. D. Baranovskii and P. Thomas

Phys. Rev. Lett.**69**, 993 (1992)**Giant electropleochroism in GaAs-(Al,Ga)As heterostructures: The quantum-well Pockels effect**

S. H. Kwok, H. T. Grahn, K. Ploog, and R. Merlin

Phys. Rev. Lett.**69**, 973 (1992)**Spin-flip-induced hole burning in GaAs quantum wells: Determination of the exciton Zeeman splitting**

H. Wang, M. Jiang, R. Merlin, and D. G. Steel

Phys. Rev. Lett.**69**, 804 (1992)**Terahertz emission in single quantum wells after coherent optical excitation of light hole and heavy hole excitons**

Paul C. M. Planken, Martin C. Nuss, Igal Brener, Keith W. Goossen, Marie S. C. Luo, Shun Lien Chuang and Loren Pfeiffer

Phys. Rev. Lett.**69**, 3800 (1992)**Observation of the coupled exciton-photon mode splitting in a semiconductor quantum microcavity**

C. Weisbuch, M. Nishioka, A. Ishikawa, and Y. Arakawa

Phys. Rev. Lett.**69**, 3314 (1992)**Excitonic gain and laser emission in ZnSe-based quantum wells**

J. Ding, H. Jeon, T. Ishihara, M. Hagerott, A. V. Nurmikko, H. Luo, N. Samarth, and J. Furdyna

Phys. Rev. Lett.**69**, 1707 (1992)**Edge excitations and the fractional quantum Hall effect in double quantum wells**

S. R. Renn

Phys. Rev. Lett.**68**, 658 (1992)**Exciton spin dynamics in GaAs heterostructures**

S. Bar

Phys. Rev. Lett.**68**, 349 (1992)**Resonant generation of biexcitons in a GaAs quantum well**

D. J. Lovering, R. T. Phillips, G. J. Denton and G. W. Smith

Phys. Rev. Lett.**68**, 1880 (1992)**Femtosecond dynamics of resonantly excited room-temperature excitons in II-VI CdZnTe/ZnTe quantum wells**

P. C. Becker, D. Lee, A. M. Johnson, A. G. Prosser, R. D. Feldman, R. F. Austin, and R. E. Behringer

Phys. Rev. Lett.**68**, 1876 (1992)**Giant excitonic resonance in time-resolved four-wave mixing in quantum wells**

Dai

Phys. Rev. Lett.**68**, 1006 (1992)**Influence of exciton localization on recombination line shapes: InxGa1-xAs/GaAs quantum wells as a model**

R. F. Schnabel, R. Zimmermann, D. Bimberg, H. Nickel, R. Lösch, and W. Schlapp

Phys. Rev. B**46**, 9873 (1992)**Effect of the electron Coulomb potential on hole confinement in II-VI quantum wells**

A. V. Kavokin, V. P. Kochereshko, G. R. Posina, I. N. Uraltsev, D. R. Yakovlev, G. Landwehr, R. N. Bicknell

Phys. Rev. B**46**, 9788 (1992)**Phys. Rev. B 45, 8749**

I. Brener, M. Olszakier, E. Cohen, E. Ehrenfreund, Arza Ron and L. Pfeiffer

Phys. Rev. B**46**, 7927 (1992)**Spin-resolved femtosecond magnetoexciton interactions in GaAs quantum wells**

J. B. Stark, W. H. Knox, and D. S. Chemla

Phys. Rev. B**46**, 7919 (1992)**Exciton oscillator strength in magnetic-field-induced spin superlattices CdTe/(Cd,Mn)Te**

E. L. Ivchenko, A. V. Kavokin, V. P. Kochereshko, G. R. Posina, I. N. Uraltsev, D. R. Yakovlev, R. N. Bicknell

Phys. Rev. B**46**, 7713 (1992)**Polarization-dependent picosecond excitonic nonlinearities and the complexities of disorder**

S. T. Cundiff, H. Wang, and D. G. Steel

Phys. Rev. B**46**, 7248 (1992)**Magnetoexcitons in a GaSb-AlSb-InAs quantum-well structure**

X. Xia, X. M. Chen, and J. J. Quinn

Phys. Rev. B**46**, 7212 (1992)**Raman study of interface phonons in GaAs/AlAs quantum wells: Resonance with the e2-h2 exciton**

L. P. Fu, T. Schmiedel, A. Petrou, M. Dutta, P. G. Newman and M. A. Stroscio

Phys. Rev. B**46**, 7196 (1992)**Fine-structure features due to wave-function localization in coupled GaAs-AlxGa1-xAs quantum wells**

D. C. Reynolds, K. R. Evans, B. Jogai, C. E. Stutz and P. W. Yu

Phys. Rev. B**46**, 4748 (1992)**Effects of trapped states on spectra of four-wave mixing and differential transmission**

Eiichi Hanamura

Phys. Rev. B**46**, 4718 (1992)**Exciton in a quantum-well structure for arbitrary magnetic field strengths**

Bao

Phys. Rev. B**46**, 4269 (1992)**Simple analytical method for calculating exciton binding energies in semiconductor quantum wells**

Henry Mathieu, Pierre Lefebvre, and Philippe Christol

Phys. Rev. B**46**, 4092 (1992)**Magneto-optical studies of screened excitons in GaAs/AlxGa1-xAs modulation-doped quantum wells**

A. B. Henriques, E. T. R. Chidley, R. J. Nicholas, P. Dawson and C. T. Foxon

Phys. Rev. B**46**, 4047 (1992)**Exciton wave functions and optical properties in a grating of quantum-well wires**

A. D

Phys. Rev. B**46**, 2363 (1992)**Exciton delocalization in thin double-barrier GaAs/AlAs/(Al,Ga)As quantum-well structures**

J. Martinez

Phys. Rev. B**46**, 2239 (1992)**Many-body effects on intersubband transitions in semiconductor quantum-well structures**

S. L. Chuang, M. S. C. Luo, S. Schmitt

Phys. Rev. B**46**, 1897 (1992)**Indirect-to-direct crossover of laterally confined excitons in coupled quantum wells**

Garnett W. Bryant

Phys. Rev. B**46**, 1893 (1992)**Suppression of the observation of Stark ladders in optical measurements on superlattices by excitonic effects**

A. M. Fox, D. A. B. Miller, J. E. Cunningham, W. Y. Jan, C. Y. P. Chao and S. L. Chuang

Phys. Rev. B**46**, 15365 (1992)**Photoreflectance and piezophotoreflectance studies of strained-layer InxGa1-xAs-GaAs quantum wells**

G. Arnaud, J. Allègre, P. Lefebvre, H. Mathieu, L. K. Howard and D. J. Dunstan

Phys. Rev. B**46**, 15290 (1992)**Binding energies of excitons and donors in a double quantum well in a magnetic field**

J. Cen and K. K. Bajaj

Phys. Rev. B**46**, 15280 (1992)**Excitons in semiconductor superlattices: Heuristic description of the transfer between Wannier-like and Frenkel-like regimes**

Pierre Lefebvre, Philippe Christol, and Henry Mathieu

Phys. Rev. B**46**, 13603 (1992)**Response of excitonic absorption spectra to photoexcited carriers in GaAs quantum wells**

D. R. Wake, H. W. Yoon, J. P. Wolfe and H. Morkoç

Phys. Rev. B**46**, 13452 (1992)**Ideal interband absorption spectra in an indirect-gap-semiconductor quantum well**

P. K. Basu and Sajal K. Paul

Phys. Rev. B**46**, 13389 (1992)**Electric field dependence of the propagation of quantum-well exciton polaritons in a waveguide structure**

Kensuke Ogawa, Toshio Katsuyama, and Masahiko Kawata

Phys. Rev. B**46**, 13289 (1992)**Excitonic spectrum of [111] GaAs/GaxAl1-xAs quantum wells**

L. Viña, L. Muñoz, F. Calle, N. Mestres, J. M. Calleja and W. I. Wang

Phys. Rev. B**46**, 13234 (1992)**Reduced binding energy of the symmetric heavy-hole exciton in GaAs/AlxGa1-xAs symmetric coupled double quantum wells**

Q. X. Zhao, B. Monemar, T. Westgaard, B. O. Fimland and K. Johannessen

Phys. Rev. B**46**, 12853 (1992)**Excitons in dense two-dimensional electron-hole magnetoplasmas**

L. V. Butov, V. D. Kulakovskii, G. E. W. Bauer A. Forchel and D. Grützmacher

Phys. Rev. B**46**, 12765 (1992)**Longitudinal Coulomb attraction in coupled quantum wells**

Shaozhong Li and Jacob B. Khurgin

Phys. Rev. B**46**, 12535 (1992)**Exciton energies and band-offset determination in magnetic superlattices**

P. Harrison, J. Goodwin, and W. E. Hagston

Phys. Rev. B**46**, 12377 (1992)**Influence of the exciton lifetime on resonant Raman scattering in quantum wells**

A. J. Shields, M. Cardona, R. Nötzel, and K. Ploog

Phys. Rev. B**46**, 10490 (1992)**Polarization dependence of heavy- and light-hole quantum beats**

Stefan Schmitt

Phys. Rev. B**46**, 10460 (1992)**Modified perturbational method for the magnetoexciton ground state in quantum wells**

Kyu

Phys. Rev. B**46**, 10269 (1992)**Intrinsic linewidths and radiative lifetimes of free excitons in GaAs quantum wells**

Vivek Srinivas, John Hryniewicz, Yung Jui Chen, and Colin E. C. Wood

Phys. Rev. B**46**, 10193 (1992)**Metastable energy distribution and localization of spatially indirect excitons**

J. E. Golub, K. Kash, J. P. Harbison, and L. T. Florez

Phys. Rev. B**45**, 9477 (1992)**Photoluminescence from AlxGa1-xAs/GaAs quantum wells quenched by intense far-infrared radiation**

S. M. Quinlan, A. Nikroo, M. S. Sherwin, M. Sundaram and A. C. Gossard

Phys. Rev. B**45**, 9428 (1992)**Excitons in the quasi-two-dimensional electron gas**

Gerrit E. W. Bauer

Phys. Rev. B**45**, 9153 (1992)**Exciton dynamics for extended monolayer islands in thin In0.53Ga0.47As/InP quantum wells**

G. Bacher, J. Kovac, K. Streubel, H. Schweizer, and F. Scholz

Phys. Rev. B**45**, 9136 (1992)**Binding energy of a confined hydrogenic impurity in a semiconductor quantum well**

B. Sunder

Phys. Rev. B**45**, 8562 (1992)**Excitonic enhancement of the Fermi-edge singularity in a dense two-dimensional electron gas**

W. Chen, M. Fritze, W. Walecki, A. V. Nurmikko, D. Ackley, J. M. Hong and L. L. Chang

Phys. Rev. B**45**, 8464 (1992)**Many-electron excitons and Fermi-edge singularities in wide, parabolic (Al,Ga)As quantum wells**

M. Fritze, W. Chen, A. V. Nurmikko, J. Jo, M. Santos, and M. Shayegan

Phys. Rev. B**45**, 8408 (1992)**Dynamics of exciton relaxation in GaAs/AlxGa1-xAs quantum wells**

Ph. Roussignol, C. Delalande, A. Vinattieri, L. Carraresi, and M. Colocci

Phys. Rev. B**45**, 6965 (1992)**Dielectric confinement effect on excitons in PbI4-based layered semiconductors**

X. Hong, T. Ishihara, and A. V. Nurmikko

Phys. Rev. B**45**, 6961 (1992)**Simple formula for exciton binding energy in quantum wells with zero band offsets**

Ian Galbraith

Phys. Rev. B**45**, 6950 (1992)**Pressure dependence of the exciton absorption and the electronic subband structure of a Ga0.47In0.53As/Al0.48In0.52As multiple-quantum-well system**

A. R. Goi, K. Syassen, Y. Zhang, K. Ploog, A. Cantarero and A. Cros

Phys. Rev. B**45**, 6809 (1992)**Quasi-two-dimensional electron system in a GaAs/AlxGa1-xAs heterojunction**

Y. Fu, Q. Chen, M. Willander and K. A. Chao

Phys. Rev. B**45**, 6709 (1992)**Excitonic effects in separate-confinement quantum-well heterostructures CdTe/(Cd,Zn)Te**

E. Deleporte, J. M. Berroir, C. Delalande, N. Magnea, H. Mariette, J. Allegre and J. Calatayud

Phys. Rev. B**45**, 6305 (1992)**Calculation of the exciton binding energies in type-II GaAs/AlAs quantum-well structures: Application of the perturbation-variational expansion method**

Spiros V. Branis and K. K. Bajaj

Phys. Rev. B**45**, 6271 (1992)**Impact ionization of excitons and donors in AlxGa1-xAs/(n-type GaAs):Si quantum wells**

H. Weman, G. M. Treacy, H. P. Hjalmarson, K. K. Law, J. L. Merz, and A. C. Gossard

Phys. Rev. B**45**, 6263 (1992)**Fine structures in the electroabsorption spectra of GaAs quantum wells**

Guozhong Wen and Yia

Phys. Rev. B**45**, 6101 (1992)**Quasi-two-dimensional excitons in (Zn,Cd)Se/ZnSe quantum wells: Reduced exciton**

N. T. Pelekanos, J. Ding, M. Hagerott, A. V. Nurmikko, H. Luo, N. Samarth, and J. K. Furdyna

Phys. Rev. B**45**, 6037 (1992)**Quantum-well reflectivity and exciton-polariton dispersion**

F. Tassone, F. Bassani and L. C. Andreani

Phys. Rev. B**45**, 6023 (1992)**Optical dephasing of light-hole excitons in GaAs single quantum wells**

A. Honold, T. Saku, Y. Horikoshi and K. Köhler

Phys. Rev. B**45**, 6010 (1992)**Optical properties of (001)- and (111)-oriented (In,Ga)As-GaAs strained-layer superlattices**

Geoffrey Duggan, Karen J. Moore, Age Raukema, Gerke Th. Jaarsma, and Karl Woodbridge

Phys. Rev. B**45**, 4494 (1992)**Biexciton creation and recombination in a GaAs quantum well**

R. T. Phillips, D. J. Lovering, G. J. Denton and G. W. Smith

Phys. Rev. B**45**, 4308 (1992)**Density dependence of nonresonant tunneling in asymmetric coupled quantum wells**

D. H. Levi, D. R. Wake, M. V. Klein, S. Kumar and H. Morkoç

Phys. Rev. B**45**, 4274 (1992)**Optical- and acoustical-phonon-assisted hopping of localized excitons in CdTe/ZnTe quantum wells**

H. Kalt, J. Collet, S. D. Baranovskii, Rosari Saleh, and P. Thomas

Phys. Rev. B**45**, 4253 (1992)**Exciton, heavy-hole, and electron g factors in type-I GaAs/AlxGa1-xAs quantum wells**

M. J. Snelling, E. Blackwood, C. J. McDonagh, R. T. Harley and C. T. B. Foxon

Phys. Rev. B**45**, 3922 (1992)**Excitonic effects on coherent oscillations of a photoexcited wave packet in double quantum wells**

Jihad M. Mohaidat, Kai Shum, and R. R. Alfano

Phys. Rev. B**45**, 3822 (1992)**Photoluminescence studies of InxGa1-xAs/GaAs strained quantum wells under hydrostatic pressure**

Guo

Phys. Rev. B**45**, 3489 (1992)**Energy relaxation of hot two-dimensional excitons in a GaAs quantum well by exciton-phonon interaction**

P. K. Basu and Partha Ray

Phys. Rev. B**45**, 1907 (1992)**Optical properties of excitons in GaAs/Al0.3Ga0.7As symmetric double quantum wells**

T. Westgaard, Q. X. Zhao, B. O. Fimland, K. Johannessen and L. Johnsen

Phys. Rev. B**45**, 1784 (1992)**Effect of subband mixing on exciton binding energies in type-II quantum-well structures**

J. Cen and K. K. Bajaj

Phys. Rev. B**45**, 14380 (1992)**Piezomodulated reflectivity of asymmetric and symmetric Alx1Ga1-x1As/GaAs/Alx3Ga1-x3As single quantum wells**

C. Parks, R. G. Alonso, A. K. Ramdas, L. R. Ram

Phys. Rev. B**45**, 14215 (1992)**Piezomodulated reflectivity of asymmetric and symmetric Alx1Ga1-x1As/GaAs/Alx3Ga1-x3As single quantum wells**

C. Parks, R. G. Alonso, A. K. Ramdas, L. R. Ram

Phys. Rev. B**45**, 14215 (1992)**Islands at semiconductor interfaces**

A. Catellani and P. Ballone

Phys. Rev. B**45**, 14197 (1992)**Measured transition from two-dimensional to three-dimensional electroabsorption as quantum-well barriers are lowered**

K. W. Goossen, J. E. Cunningham, M. D. Williams, F. G. Storz, and W. Y. Jan

Phys. Rev. B**45**, 13773 (1992)**Effects of the exciton continuum on resonant Raman scattering in GaAs quantum wells**

Guozhong Wen and Yia

Phys. Rev. B**45**, 13562 (1992)**Enhancement of electron-hole pair mobilities in thin GaAs/AlxGa1-xAs quantum wells**

H. Hillmer, A. Forchel and C. W. Tu

Phys. Rev. B**45**, 1240 (1992)**Comparison of (111)- and (001)-grown GaAs-AlxGa1-xAs quantum wells by magnetoreflectance**

Weimin Zhou, Doran D. Smith, H. Shen, J. Pamulapati, M. Dutta, A. Chin and J. Ballingall

Phys. Rev. B**45**, 12156 (1992)**Comparison of (111)- and (001)-grown GaAs-AlxGa1-xAs quantum wells by magnetoreflectance**

Weimin Zhou, Doran D. Smith, H. Shen, J. Pamulapati, M. Dutta, A. Chin and J. Ballingall

Phys. Rev. B**45**, 12156 (1992)**Modulated reflectivity spectrum of strained ZnSe/Zn1-xCdxSe/ZnSe single quantum wells**

R. G. Alonso, C. Parks, A. K. Ramdas, H. Luo, N. Samarth, J. K. Furdyna and L. R. Ram

Phys. Rev. B**45**, 1181 (1992)**Time-resolved exciton transfer in GaAs/AlxGa1-xAs double-quantum-well structures**

R. Ferreira, P. Rolland, Ph. Roussignol, C. Delalande, A. Vinattieri, L. Carraresi, M. Colocci, N. Roy, B. Sermage, J. F. Palmier and B. Etienne

Phys. Rev. B**45**, 11782 (1992)**Magnetic-field-induced enhancement of exciton oscillator strength in In0.53Ga0.47As/InP quantum wells**

Mitsuru Sugawara

Phys. Rev. B**45**, 11423 (1992)**Density-dependent exciton radiative lifetimes in GaAs quantum wells**

R. Eccleston, B. F. Feuerbacher, J. Kuhl, W. W. Rühle, and K. Ploog

Phys. Rev. B**45**, 11403 (1992)**Acceptor-bound excitons in GaAs/AlxGa1-xAs symmetric coupled-double-quantum-well structures**

Q. X. Zhao, T. Westgaard, B. O. Fimland and K. Johannessen

Phys. Rev. B**45**, 11346 (1992)**Light- and heavy-hole free-exciton transitions in narrow InxGa1-xAs/GaAs quantum wells**

D. C. Reynolds, K. R. Evans, C. E. Stutz, B. Jogai, C. R. Wie and P. W. Yu

Phys. Rev. B**45**, 11156 (1992)**Optical bistability in a multiple-quantum-well structure with Fabry-Pérot and distributed-feedback resonators**

G. P. Bava, F. Castelli, P. Debernardi and L. A. Lugiato

Phys. Rev. A**45**, 5180 (1992)