Optical control and mode selective excit
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Hiroshi Takahashi; Keiko Kato; Hidetoshi Nakano; Masahiro Kitajima; Kenji Ohmori
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Article
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2009
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Elsevier Science
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English
โ 797 KB
Femtosecond time-resolved reflectivity measurement is performed on YBa 2 Cu 3 O 7-ฮด films. Coherent phonons of both the Ba-O and Cu-O modes are observed at frequencies of 3.4 and 4.3 THz, respectively. Amplitudes of both Ba-O and Cu-O modes are optically manipulated by using a pair of femtosecond pu