Raman studies of the decay of the longitudinal optical phonons in wurtzite GaN and AlxGa1-xN

Kong-Thon F. Tsen; David K. Ferry; Stephen M. Goodnick; A. Salvador; Hadis Morkoc

doi:10.1117/12.381468

28 March 2000 Raman studies of the decay of the longitudinal optical phonons in wurtzite GaN and Al_xGa_1-xN

Kong-Thon F. Tsen, David K. Ferry, Stephen M. Goodnick, A. Salvador, Hadis Morkoc

Proceedings Volume 3940, Ultrafast Phenomena in Semiconductors IV; (2000) https://doi.org/10.1117/12.381468
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

Decay of the longitudinal optical (LO) phonons in wurtzite GaN and Al_xGa_1-xN (x equals 0.1) has been studied by subpicosecond time-resolved Raman spectroscopy. In contrast to the usually-believed 2LA decay channel for LO phonons in other semiconductors, our experimental results show that, among the various possible decay channels, the LO phonons in wurtzite GaN and Al_xGa_1-xN (x equals 0.1) decay primarily into a large wavevector TO and a large wavevector LA or TA phonons. These experimental results are consistent with the recent theoretical calculations of the phonon dispersion curves.

Citation Download Citation

Kong-Thon F. Tsen, David K. Ferry, Stephen M. Goodnick, A. Salvador, and Hadis Morkoc "Raman studies of the decay of the longitudinal optical phonons in wurtzite GaN and Al_xGa_1-xN", Proc. SPIE 3940, Ultrafast Phenomena in Semiconductors IV, (28 March 2000); https://doi.org/10.1117/12.381468

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