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Phys. Rev. Lett. 86, 2158–2161 (2001)

Wave Packet Dynamics in a Quasi-One-Dimensional Metal-Halogen Complex Studied by Ultrafast Time-Resolved Spectroscopy

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A. Sugita, T. Saito, and H. Kano
Department of Physics, University of Tokyo, 7-3-1, Hongo, Bukyo-ku, Tokyo 113-0033, Japan

M. Yamashita
Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan

T. Kobayashi
Department of Physics, University of Tokyo, 7-3-1, Hongo, Bukyo-ku, Tokyo 113-0033, Japan

Received 14 June 2000; published in the issue dated 5 March 2001

An ultrafast optical response is studied in a quasi-one-dimensional halogen-bridged mixed-valence metal complex [Pt(en)2][Pt(en)2I2](ClO4)4 with ultrafast time resolution. Wave packet motions both in the ground and self-trapped exciton (STE) states are observed as oscillatory modulations in the time-resolved reflectivity. The wave packet motion on the STE potential surface begins after about 50 fs with respect to the photoexcitation. This delay is attributed to the lattice relaxation from the free exciton state to the STE state.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.2158
DOI:
10.1103/PhysRevLett.86.2158
PACS:
78.47.+p, 71.35.Cc, 71.38.-k, 71.45.Lr