Abstract

The polarization dependence of quantum beats from the A-exciton and the B-exciton in a GaN sample of exceptional quality is studied with four-wave mixing experiments. When changing the incident polarizations from collinear to crossed linear, a π-phase shift of the beats is observed while the decay rate remains unchanged. This confirms previous theoretical predictions.

© 1997 Optical Society of America

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References

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  1. S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
    [Crossref]
  2. T. Saiki, M. Kuwata-Gonokami, T. Matsusue, and H. Sakaki, “Photon echo induced by two-exciton coherence in a GaAs quantum well” Phys. Rev. B 49, 7817–7820 (1994).
    [Crossref]
  3. T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
    [Crossref]
  4. T. Saiki, M. Kuwata-Gonokami, K. Ohkawa, and T. Mitsuyu, “Role of biexciton state in excitonic resonant nonlinearity in homoepitaxial ZnSe” Solid State Commun. 95, 679–683 (1995).
    [Crossref]
  5. D. Weber, W. Petri, U. Woggon, C.F. Klingshirn, S. Shevel, and E.O. Göbel, “Quantum beats of polaritons in hexagonal CdS crystals” Phys. Rev. B 55, 12848–12851 (1997).
    [Crossref]
  6. R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.
  7. A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
    [Crossref]
  8. A. Usui, H. Sunakawa, A. Sakai, and A.A. Yamaguchi, “Thick GaN Epitaxial Growth with Low Dislocation Density by Hydride Vapor Phase Epitaxy” Jpn. J. Appl. Phys. 36, L899–L902 (1997).
    [Crossref]
  9. T. Yajima and Y. Taira, “Spatial optical parametric coupling of picosecond light pulses and transverse relaxation effect in resonant media” J. Phys. Soc. Jpn. 47, 1620–1623 (1979).
    [Crossref]

1997 (3)

D. Weber, W. Petri, U. Woggon, C.F. Klingshirn, S. Shevel, and E.O. Göbel, “Quantum beats of polaritons in hexagonal CdS crystals” Phys. Rev. B 55, 12848–12851 (1997).
[Crossref]

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

A. Usui, H. Sunakawa, A. Sakai, and A.A. Yamaguchi, “Thick GaN Epitaxial Growth with Low Dislocation Density by Hydride Vapor Phase Epitaxy” Jpn. J. Appl. Phys. 36, L899–L902 (1997).
[Crossref]

1996 (1)

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

1995 (1)

T. Saiki, M. Kuwata-Gonokami, K. Ohkawa, and T. Mitsuyu, “Role of biexciton state in excitonic resonant nonlinearity in homoepitaxial ZnSe” Solid State Commun. 95, 679–683 (1995).
[Crossref]

1994 (1)

T. Saiki, M. Kuwata-Gonokami, T. Matsusue, and H. Sakaki, “Photon echo induced by two-exciton coherence in a GaAs quantum well” Phys. Rev. B 49, 7817–7820 (1994).
[Crossref]

1992 (1)

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

1979 (1)

T. Yajima and Y. Taira, “Spatial optical parametric coupling of picosecond light pulses and transverse relaxation effect in resonant media” J. Phys. Soc. Jpn. 47, 1620–1623 (1979).
[Crossref]

Akasaki, I.

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

Albrecht, T.F.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Amano, H.

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

Bakker, H.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Bennhardt, D.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Bott, K.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Cundiff, S.T.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Euteneuer, A.

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

Feldmann, J.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Fischer, A.J.

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

Göbel, E. O.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Göbel, E.O.

D. Weber, W. Petri, U. Woggon, C.F. Klingshirn, S. Shevel, and E.O. Göbel, “Quantum beats of polaritons in hexagonal CdS crystals” Phys. Rev. B 55, 12848–12851 (1997).
[Crossref]

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

Goldenberg, B.

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

Haring, P.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Heuckeroth, V.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Hofmann, M.R.

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

Horning, R.

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

Kim, D.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Kim, D.S.

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

Klingshirn, C.F.

D. Weber, W. Petri, U. Woggon, C.F. Klingshirn, S. Shevel, and E.O. Göbel, “Quantum beats of polaritons in hexagonal CdS crystals” Phys. Rev. B 55, 12848–12851 (1997).
[Crossref]

Koch, M.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Koch, S. W.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Köhler, K.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Kuwata-Gonokami, M.

T. Saiki, M. Kuwata-Gonokami, K. Ohkawa, and T. Mitsuyu, “Role of biexciton state in excitonic resonant nonlinearity in homoepitaxial ZnSe” Solid State Commun. 95, 679–683 (1995).
[Crossref]

T. Saiki, M. Kuwata-Gonokami, T. Matsusue, and H. Sakaki, “Photon echo induced by two-exciton coherence in a GaAs quantum well” Phys. Rev. B 49, 7817–7820 (1994).
[Crossref]

Leo, K.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Maidorn, G.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Matsusue, T.

T. Saiki, M. Kuwata-Gonokami, T. Matsusue, and H. Sakaki, “Photon echo induced by two-exciton coherence in a GaAs quantum well” Phys. Rev. B 49, 7817–7820 (1994).
[Crossref]

Meyer, B.K.

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

Mitsuyu, T.

T. Saiki, M. Kuwata-Gonokami, K. Ohkawa, and T. Mitsuyu, “Role of biexciton state in excitonic resonant nonlinearity in homoepitaxial ZnSe” Solid State Commun. 95, 679–683 (1995).
[Crossref]

Möbius, J.

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

Ohkawa, K.

T. Saiki, M. Kuwata-Gonokami, K. Ohkawa, and T. Mitsuyu, “Role of biexciton state in excitonic resonant nonlinearity in homoepitaxial ZnSe” Solid State Commun. 95, 679–683 (1995).
[Crossref]

Park, G.H.

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

Petri, W.

D. Weber, W. Petri, U. Woggon, C.F. Klingshirn, S. Shevel, and E.O. Göbel, “Quantum beats of polaritons in hexagonal CdS crystals” Phys. Rev. B 55, 12848–12851 (1997).
[Crossref]

Rühle, W.W.

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

Saiki, T.

T. Saiki, M. Kuwata-Gonokami, K. Ohkawa, and T. Mitsuyu, “Role of biexciton state in excitonic resonant nonlinearity in homoepitaxial ZnSe” Solid State Commun. 95, 679–683 (1995).
[Crossref]

T. Saiki, M. Kuwata-Gonokami, T. Matsusue, and H. Sakaki, “Photon echo induced by two-exciton coherence in a GaAs quantum well” Phys. Rev. B 49, 7817–7820 (1994).
[Crossref]

Sakai, A.

A. Usui, H. Sunakawa, A. Sakai, and A.A. Yamaguchi, “Thick GaN Epitaxial Growth with Low Dislocation Density by Hydride Vapor Phase Epitaxy” Jpn. J. Appl. Phys. 36, L899–L902 (1997).
[Crossref]

Sakaki, H.

T. Saiki, M. Kuwata-Gonokami, T. Matsusue, and H. Sakaki, “Photon echo induced by two-exciton coherence in a GaAs quantum well” Phys. Rev. B 49, 7817–7820 (1994).
[Crossref]

Schmitt-Rink, S.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Schulze, A.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Shah, J.

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Shan, W.

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

Shevel, S.

D. Weber, W. Petri, U. Woggon, C.F. Klingshirn, S. Shevel, and E.O. Göbel, “Quantum beats of polaritons in hexagonal CdS crystals” Phys. Rev. B 55, 12848–12851 (1997).
[Crossref]

Song, J.J.

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

Stolz, W.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Sunakawa, H.

A. Usui, H. Sunakawa, A. Sakai, and A.A. Yamaguchi, “Thick GaN Epitaxial Growth with Low Dislocation Density by Hydride Vapor Phase Epitaxy” Jpn. J. Appl. Phys. 36, L899–L902 (1997).
[Crossref]

Taira, Y.

T. Yajima and Y. Taira, “Spatial optical parametric coupling of picosecond light pulses and transverse relaxation effect in resonant media” J. Phys. Soc. Jpn. 47, 1620–1623 (1979).
[Crossref]

Thomas, P.

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

Usui, A.

A. Usui, H. Sunakawa, A. Sakai, and A.A. Yamaguchi, “Thick GaN Epitaxial Growth with Low Dislocation Density by Hydride Vapor Phase Epitaxy” Jpn. J. Appl. Phys. 36, L899–L902 (1997).
[Crossref]

Weber, D.

D. Weber, W. Petri, U. Woggon, C.F. Klingshirn, S. Shevel, and E.O. Göbel, “Quantum beats of polaritons in hexagonal CdS crystals” Phys. Rev. B 55, 12848–12851 (1997).
[Crossref]

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

Woggon, U.

D. Weber, W. Petri, U. Woggon, C.F. Klingshirn, S. Shevel, and E.O. Göbel, “Quantum beats of polaritons in hexagonal CdS crystals” Phys. Rev. B 55, 12848–12851 (1997).
[Crossref]

Yajima, T.

T. Yajima and Y. Taira, “Spatial optical parametric coupling of picosecond light pulses and transverse relaxation effect in resonant media” J. Phys. Soc. Jpn. 47, 1620–1623 (1979).
[Crossref]

Yamaguchi, A.A.

A. Usui, H. Sunakawa, A. Sakai, and A.A. Yamaguchi, “Thick GaN Epitaxial Growth with Low Dislocation Density by Hydride Vapor Phase Epitaxy” Jpn. J. Appl. Phys. 36, L899–L902 (1997).
[Crossref]

Yee, D.S.

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

Zimmermann, R.

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

J. Phys. Soc. Jpn. (1)

T. Yajima and Y. Taira, “Spatial optical parametric coupling of picosecond light pulses and transverse relaxation effect in resonant media” J. Phys. Soc. Jpn. 47, 1620–1623 (1979).
[Crossref]

Jpn. J. Appl. Phys. (1)

A. Usui, H. Sunakawa, A. Sakai, and A.A. Yamaguchi, “Thick GaN Epitaxial Growth with Low Dislocation Density by Hydride Vapor Phase Epitaxy” Jpn. J. Appl. Phys. 36, L899–L902 (1997).
[Crossref]

Phys. Rev. B (5)

A.J. Fischer, W. Shan, G.H. Park, J.J. Song, D.S. Kim, D.S. Yee, R. Horning, and B. Goldenberg, “Femtosecond four-wave-mixing studies of nearly homogeneously broadened excitons in GaN” Phys. Rev. B 56, 1077–1080 (1997).
[Crossref]

D. Weber, W. Petri, U. Woggon, C.F. Klingshirn, S. Shevel, and E.O. Göbel, “Quantum beats of polaritons in hexagonal CdS crystals” Phys. Rev. B 55, 12848–12851 (1997).
[Crossref]

S. Schmitt-Rink, D. Bennhardt, V. Heuckeroth, P. Thomas, P. Haring, G. Maidorn, H. Bakker, K. Leo, D. Kim, J. Shah, and K. Köhler, “Polarization dependence of heavy- and light-hole quantum beats” Phys. Rev. B 46, 10460–10463 (1992).
[Crossref]

T. Saiki, M. Kuwata-Gonokami, T. Matsusue, and H. Sakaki, “Photon echo induced by two-exciton coherence in a GaAs quantum well” Phys. Rev. B 49, 7817–7820 (1994).
[Crossref]

T.F. Albrecht, K. Bott, A. Schulze, M. Koch, S.T. Cundiff, J. Feldmann, W. Stolz, P. Thomas, S. W. Koch, and E. O. Göbel, “Disorder mediated biexcitonic beats in semiconductor quantum wells” Phys. Rev. B 54, 4436–4439 (1996).
[Crossref]

Solid State Commun. (1)

T. Saiki, M. Kuwata-Gonokami, K. Ohkawa, and T. Mitsuyu, “Role of biexciton state in excitonic resonant nonlinearity in homoepitaxial ZnSe” Solid State Commun. 95, 679–683 (1995).
[Crossref]

Other (1)

R. Zimmermann, M.R. Hofmann, A. Euteneuer, J. Möbius, D. Weber, W.W. Rühle, E.O. Göbel, B.K. Meyer, H. Amano, and I. Akasaki, “Quantum beat spectroscopy on excitons in GaN” ICAM’97/E-MRS’97, Strasbourg(1997), L-XII.3.

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Fig. 1.
Fig. 1.

(a) The reflection spectrum of our GaN sample. Each label for a resonance indicates the corresponding transition. (b) The laser spectrum as used for excitation in the FWM experiments.

Fig. 2.
Fig. 2.

The FWM signals in the direction 2k 1 - k 2 as a function of time delay τ between the pulse k 1 and pulse k 2 for collinear (a) and crossed linear (b) incident polarizations. Positive time delay is defined as pulse k 2 arriving first.

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