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Theory of strong-field pump—probe spectroscopy in J-aggregates

✍ Scribed by Frank C. Spano

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
546 KB
Volume
220
Category
Article
ISSN
0009-2614

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✦ Synopsis

A nonperturbative theory for the pump-probe absorption spectrum of Frenkel exciton chains is developed in the early saturation regime. In the J-aggregate configuration, the entire spectrum is blue-shifted in proportion to the pump intensity. The results are in good agreement with experiment.

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Pump—probe spectroscopy and exciton dynamics of J aggregates at high pump intensities
✍ Alan E. Johnson; Shigeichi Kumazaki; Keitaro Yoshihara 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 482 KB

We have measured the picosecond pump-probe spectra of BIC J aggregates using a spectral continuum for the probe. The excitation pulses were intense ( 10L5-2 x lOI photons/cm\*) and created many excitons per aggregate. The observed dynamics are intensity dependent and reflect exciton-exciton annihila