Transient four-wave-mixing spectroscopy on gallium nitride: Energy splittings of intrinsic excitonic resonances

R. Zimmermann; A. Euteneuer; J. Möbius; D. Weber; M. R. Hofmann; W. W. Rühle; E. O. Göbel; B. K. Meyer; H. Amano; I. Akasaki

doi:10.1103/PhysRevB.56.R12722

Rapid Communication

Transient four-wave-mixing spectroscopy on gallium nitride: Energy splittings of intrinsic excitonic resonances

R. Zimmermann, A. Euteneuer, J. Möbius, D. Weber, M. R. Hofmann, W. W. Rühle, E. O. Göbel, B. K. Meyer, H. Amano, and I. Akasaki

Phys. Rev. B 56, R12722(R) – Published 15 November 1997

Abstract

We present transient and spectrally resolved four-wave-mixing studies on excitonic transitions in GaN with wurtzite structure. Coherent excitation of the $A$ and $B$ excitons results in a pronounced beating with a period of 0.520 ps, corresponding to an $A - B$ splitting of (7.98±0.03) meV. A biexcitonic binding energy of (5.7±0.3) meV is obtained from the power spectrum of the four-wave-mixing signal.