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 |
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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 journal › Article
}
TY - JOUR
T1 - Comparison of coherent and incoherent LO phonons in isotopic 70Ge/74Ge superlattices
AU - Nakajima, M.
AU - Mizoguchi, K.
AU - Morita, K.
AU - Itoh, Kohei M
AU - Harima, H.
AU - Nakashima, S.
PY - 2000/5
Y1 - 2000/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0033745258&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033745258&partnerID=8YFLogxK
U2 - 10.1016/S0022-2313(99)00481-0
DO - 10.1016/S0022-2313(99)00481-0
M3 - Article
AN - SCOPUS:0033745258
VL - 87
SP - 942
EP - 944
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
ER -