Femtosecond transient absorption spectroscopy and its applications

doi:10.3969/j.issn.1007-5461.2021.05.001

Abstract

Abstract: The emergence of ultrafast laser spectroscopy technology has greatly promoted the deep understanding of the microscopic processes of ultrashort time scale (such as femtosecond) in many research fields. The principle and techniques of femtosecond time-resolved transient absorption spectra are introduced in detail. Combined with our research results, the application of this method in the study of the microscopic mechanism of ultrafast relaxations and interactions in the excited states of condensed molecular systems is demonstrated, especially for relaxation of excited states, evolution pathway and coherence of wavepacket, energy transfer, proton/charge transfer, molecular structural dynamics and so on. It is indicated that this method will play an important role in other related fields such as physics, chemistry, materials, biology, environment and other interdisciplinary fields. Finally, the potential developments and further research trends of the ultrafast spectroscopy are prospected.

Key words: spectroscopy, ultrafast relaxation, femtosecond time-resolution, transient absorption, excited state dynamics

CLC Number:

O433.5

WANG Ye, ZHANG Song, ∗, ZHANG Bing. Femtosecond transient absorption spectroscopy and its applications[J]. Chinese Journal of Quantum Electronics, 2021, 38(5): 547-563.

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