Resonant secondary emisssion in beta-ZnP2

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

doi:10.1117/12.200975

9 February 1995 Resonant secondary emisssion in beta-ZnP2

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

Proceedings Volume 2362, International Conference on Excitonic Processes in Condensed Matter; (1995) https://doi.org/10.1117/12.200975
Event: Excitonic Processes in Condensed Matter: International Conference, 1994, Darwin, Australia

Abstract

Relaxation processes of exciton polaritons in monoclinic zinc diphosphide (beta) -ZnP₂ have been investigated in detail by measuring resonant secondary emission spectra under excitation into the energy range from the interband to the exciton-bands region. In addition to the 1LO line of 32.2 meV already reported, we have found more than 30 resonant Raman lines ranging from 9.4 meV to 58.9 meV by varying the excitation energy. These lines are observed distinctly only when their scattered energies fall into the vicinity of the 1s exciton energy. It is confirmed that among phonons of 72 modes the LO phonon of 32.2 meV preferentially governs the relaxation processes of exciton polaritons in (beta) -ZnP₂. We have also observed a significant intensity decrease of the exciton polariton luminescence when the excitation energy is lowered across the 1s longitudinal exciton energy E_L. A brief discussion is made in this connection.

Citation Download Citation

Osamu Arimoto, Mitsuru Sugisaki, Kaizo Nakamura, Koichiro Tanaka, and Tohru Suemoto "Resonant secondary emisssion in beta-ZnP2", Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); https://doi.org/10.1117/12.200975

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