Femtosecond optical spectroscopy of fullerites

A. L. Dobryakov; V. M. Farztdinov; Yurii E. Lozovik; Juru A. Matveets; Andrei G. Stepanov; Arkady P. Yartsev; Vladilen S. Letokhov

doi:10.1117/12.239774

10 May 1996 Femtosecond optical spectroscopy of fullerites

A. L. Dobryakov, V. M. Farztdinov, Yurii E. Lozovik, Juru A. Matveets, Andrei G. Stepanov, Arkady P. Yartsev, Vladilen S. Letokhov

Author Affiliations +

Proceedings Volume 2797, Nonlinear Spectroscopy and Ultrafast Phenomena; (1996) https://doi.org/10.1117/12.239774
Event: International Conference on Coherent and Nonlinear Optics, 1995, St. Petersburg, Russian Federation

Abstract

The spectral dependence of ultrafast relaxation of excitations in a C₆₀ thin film was discovered with the help of femtosecond laser spectroscopy. The dependence can be explained by the relaxation of excitations in different energy bands. The temporal dependence of photoinduced darkening is characterized by peak at delays of the order of pulse duration (approximately 50 fs). The peak is replaced at greater delays by a decrease with characteristic times (tau) ₁ equals 0.4 ps and (tau) ₂ equals 30 ps, determined by the relaxation of electrons on intramolecular and intermolecular oscillations. The spectral dependence of two- photon absorption is investigated.

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A. L. Dobryakov, V. M. Farztdinov, Yurii E. Lozovik, Juru A. Matveets, Andrei G. Stepanov, Arkady P. Yartsev, and Vladilen S. Letokhov "Femtosecond optical spectroscopy of fullerites", Proc. SPIE 2797, Nonlinear Spectroscopy and Ultrafast Phenomena, (10 May 1996); https://doi.org/10.1117/12.239774

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