Ultrafast Laser Spectroscopy Applicable to Nano- and Micromaterials.

Observation of transient behavior of excited states at different frequencies is essential and of great importance in studying ultrafast photochemical and photophysical processes, such as photosynthesis, energy transfer, photochromic reaction, and carrier dynamics, of nano- and micromaterials. To investigate such phenomena, femtosecond laser spectroscopy has been extensively utilized for the last two decades [1]. In this review, we pay attention to three types of new femtosecond laser spectroscopy: optical Kerr gate (OKG) luminescence spectroscopy, transient grating spectroscopy combined with a phase mask, and real-time pump-probe imaging spectroscopy, which are applicable to the observation of transient behavior of excited states and the evaluation of optical functional properties of nano- and micromaterials. [ABSTRACT FROM AUTHOR]