Comparison of coherent and incoherent LO phonons in isotopic 70Ge/74Ge superlattices

M. Nakajima, K. Mizoguchi, K. Morita, Kohei M Itoh, H. Harima, S. Nakashima

Research output: Contribution to journalArticle

Abstract

Coherent LO phonon oscillations excited by 20-fs ultrashort laser pulses have been observed in isotopic 70Ge/74Ge superlattices by a pump-probe technique. Fourier-transformed spectra of the time-domain signal were compared with incoherent LO phonon spectra measured by Raman spectroscopy. The spectra of coherent phonons are quite different from the Raman spectra with common excitation wavelength. This comparison indicates that the pump-probe experiment detects the region which is different from where Raman experiment probes.

Original languageEnglish
Pages (from-to)942-944
Number of pages3
JournalJournal of Luminescence
Volume87
DOIs
Publication statusPublished - 2000 May

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Phonons
Superlattices
superlattices
phonons
probes
Pumps
pumps
Raman Spectrum Analysis
Ultrashort pulses
Raman spectroscopy
Raman scattering
Lasers
Experiments
Raman spectra
Wavelength
oscillations
pulses
wavelengths
excitation
lasers

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Comparison of coherent and incoherent LO phonons in isotopic 70Ge/74Ge superlattices. / Nakajima, M.; Mizoguchi, K.; Morita, K.; Itoh, Kohei M; Harima, H.; Nakashima, S.

In: Journal of Luminescence, Vol. 87, 05.2000, p. 942-944.

Research output: Contribution to journalArticle

Nakajima, M. ; Mizoguchi, K. ; Morita, K. ; Itoh, Kohei M ; Harima, H. ; Nakashima, S. / Comparison of coherent and incoherent LO phonons in isotopic 70Ge/74Ge superlattices. In: Journal of Luminescence. 2000 ; Vol. 87. pp. 942-944.
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