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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 22 — Oct. 25, 2010
  • pp: 22937–22943

Phonon dynamics in γ-ray irradiated sapphire crystals studied by fs-CARS technique

Xin Du, Mingfu Zhang, Qingkun Meng, Yunfei Song, Xing He, Yanqiang Yang, and Jiecai Han  »View Author Affiliations


Optics Express, Vol. 18, Issue 22, pp. 22937-22943 (2010)
http://dx.doi.org/10.1364/OE.18.022937


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Abstract

We have studied the ultrafast dynamics of coherent phonons in sapphire crystals irradiated with 60Co γ-rays for three different doses by femtosecond time-resolved coherent anti-Stokes Raman scattering (fs-CARS) technique at room temperature. The obtained fs-CARS signals exhibit well-defined quantum beats, which are ascribed to the interference of the 645 and 750 cm−1 phonon modes. The dephasing times of the two modes both decrease with increasing irradiation dose, which is due to the scattering of coherent phonons by the defects introduced by γ-ray irradiation.

© 2010 OSA

OCIS Codes
(300.6230) Spectroscopy : Spectroscopy, coherent anti-Stokes Raman scattering
(300.6500) Spectroscopy : Spectroscopy, time-resolved
(300.6530) Spectroscopy : Spectroscopy, ultrafast

ToC Category:
Spectroscopy

History
Original Manuscript: July 28, 2010
Revised Manuscript: September 24, 2010
Manuscript Accepted: October 7, 2010
Published: October 14, 2010

Citation
Xin Du, Mingfu Zhang, Qingkun Meng, Yunfei Song, Xing He, Yanqiang Yang, and Jiecai Han, "Phonon dynamics in γ-ray irradiated sapphire crystals studied by fs-CARS technique," Opt. Express 18, 22937-22943 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-22-22937


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