Vibrational relaxation dynamics in transient grating spectroscopy studied by rate equations based on time-dependent correlation function

Abstract

A modified model, a set of rate equations based on time-dependent correlation function, is used to study vibrational relaxation dynamics in transient grating spectroscopy. The dephasing, the population dynamics, and the vibrational coherence concerning two vibrational states are observed respectively in organic dye IR780 perchlorate molecules doped polyvinyl alcohol matrix. The result shows that in addition to the information concerning system-environment interaction and vibrational coherence, the vibrational energy transfer can be described by this modified model.

Photo-induced intramolecular electron transfer and intramolecular vibrational relaxation of rhodamine 6G in DMSO revealed by multiplex transient grating spectroscopy

“…The experimental apparatus and method of multiplex TG have been described in detail previously. [38,39,44] As shown in Figs. 1(a) and 1(b), the two equal beams (𝑘 pu1 and 𝑘 pu2 ) with a wavelength centered at 530 nm are used to create the transient grating.…”

Tracking coherent population transfer and thermal population relaxation in condensed system by broad-band transient grating spectroscopy

“…BB-TG measurement has been illustrated previously [31]. The schematic is shown in figure In this research, an 800 nm, 110 fs duration, 1 kHz repetition output pulse was used as the primary beam.…”

Tracking coherent low frequency vibrational information of Rh101 in ground and excited electronic states by broadband transient grating spectroscopy

“…The TG measurement step has been reported previously. [22] Briefly, the 800-nm, 110-fs pulse duration, 1-kHz repetition output pulse was split into two beams by a 9:1 beam splitter. The 90% beam pumped an optical paramet-ric amplifier (OPA, OPA-800FC, Spectra Physics) to produce a pulse with a central wavelength of 532 nm, which was split into two uniform beams.…”