Exciton luminescence in beta-ZnP2: 2s and 3s

Mitsuru Sugisaki; Osamu Arimoto; Kaizo Nakamura; Koichiro Tanaka; Tohru Suemoto

doi:10.1117/12.200981

9 February 1995 Exciton luminescence in beta-ZnP2: 2s and 3s

Mitsuru Sugisaki, Osamu Arimoto, Kaizo Nakamura, Koichiro Tanaka, Tohru Suemoto

Proceedings Volume 2362, International Conference on Excitonic Processes in Condensed Matter; (1995) https://doi.org/10.1117/12.200981
Event: Excitonic Processes in Condensed Matter: International Conference, 1994, Darwin, Australia

Abstract

Secondary emission spectra in the higher region of exciton band of ZnP₂ single crystal are measured at 6 K with a tunable Ti:sapphire laser as an exciting light source. The luminescence bands due to the radiative recombination of the 2s, 3s and 4s excitons are clearly observed separately. It is also found that the 1LO Raman line with energy of 32.2 meV shows resonance enhancement near the 2s exciton band. On the contrary, the intensity of the 1LO Raman line becomes anomalously weak when it is just superimposed on the 3s luminescence peak. The shapes of these luminescence bands change considerably when the 1LO Raman line approaches them. The changes in intensity of the 2s and 3s exciton bands with the excitation energy are briefly discussed in regard to the relaxation processes of polariton.

Citation Download Citation

Mitsuru Sugisaki, Osamu Arimoto, Kaizo Nakamura, Koichiro Tanaka, and Tohru Suemoto "Exciton luminescence in beta-ZnP2: 2s and 3s", Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); https://doi.org/10.1117/12.200981

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