Second order optical processes in a localized electron-phonon system- Stationary response

Toshihide Takagahara, Eiichi Hanamura, Ryogo Kubot

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

A second order optical process in a localized electron-phonon system is studied under a stationary excitation. A stochastic theory of vibrational relaxation at finite temperature is constructed based upon a quantum mechanical treatment. We project the dynamical motion of the whole lattice system onto the stochastic motion of a pseudo-local mode or a localized mode visualizing this mode as a damped harmonic oscillator which undergoes a Brownian motion. The overall emission spectrum is calculated and it is found that the relative intensities of the Raman scattering and luminescence components are determined competitively by two physical parameters, i.e., the radiative damping rate and the vibrational relaxation rate. It is also discussed how the relative orders of magnitude among various components of the secondary emission depend on the incident photon energy and the temperature of phonon system.

Original languageEnglish
Pages (from-to)728-741
Number of pages14
JournalJournal of the Physical Society of Japan
Volume44
Issue number3
Publication statusPublished - 1978 Mar
Externally publishedYes

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molecular relaxation
electrons
secondary emission
harmonic oscillators
emission spectra
damping
luminescence
Raman spectra
temperature
photons
excitation
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Second order optical processes in a localized electron-phonon system- Stationary response. / Takagahara, Toshihide; Hanamura, Eiichi; Kubot, Ryogo.

In: Journal of the Physical Society of Japan, Vol. 44, No. 3, 03.1978, p. 728-741.

Research output: Contribution to journalArticle

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