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Proceedings Paper

Resonant secondary emisssion in beta-ZnP2
Author(s): Osamu Arimoto; Mitsuru Sugisaki; Kaizo Nakamura; Koichiro Tanaka; Tohru Suemoto
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Paper 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 EL. A brief discussion is made in this connection.

Paper Details

Date Published: 9 February 1995
PDF: 7 pages
Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); doi: 10.1117/12.200975
Show Author Affiliations
Osamu Arimoto, Okayama Univ. (Japan)
Mitsuru Sugisaki, Okayama Univ. (Japan)
Kaizo Nakamura, Okayama Univ. (Japan)
Koichiro Tanaka, Univ. of Tokyo (Japan)
Tohru Suemoto, Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 2362:
International Conference on Excitonic Processes in Condensed Matter

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