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 language | English |
|---|---|
| Pages (from-to) | 942-944 |
| Number of pages | 3 |
| Journal | Journal of Luminescence |
| Volume | 87 |
| DOIs | |
| Publication status | Published - 2000 May |
| Event | International Conference on Luminescence and Optical Spectroscopy of Condensed Matter (ICL'99) - Osaka, Jpn Duration: 1999 Aug 23 → 1999 Aug 27 |
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Chemistry(all)
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
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Cite this
Nakajima, M., Mizoguchi, K., Morita, K., Itoh, K., Harima, H., & Nakashima, S. (2000). Comparison of coherent and incoherent LO phonons in isotopic 70Ge/74Ge superlattices. Journal of Luminescence, 87, 942-944. https://doi.org/10.1016/S0022-2313(99)00481-0