This article is cited in 3 papers

The XI International Youth Scientific School "The Coherent Optics and Optical Spectroscopy"

Ultrafast Optical Dephasing in Doped Polymethylmetacrylate: Research by Means of Incoherent Photon Echo with Femtosecond Temporal Resolution.

K. R. Karimullin^a, Yu. G. Vainer^b, I. Yu. Eremchev^b, V. V. Samartsev

^a Zavoisky Physical Technical Institute, Kazan Scientific Center of the Russian Academy of Sciences
^b Institute of Spectroscopy, Russian Academy of Sciences

Abstract: The article describes a unique experimental arrangement based on broadband dye-laser, which allows to investigate ultrafast optical defasing processes in condenced matter with femtosecond (20–30 fs) time resolution by means of incoherent photon echo. The main advantages of this method are: a) femtosecond laser technique not being used; b) realization of “soft” sample excitation mode. The experimental results of ultrafast phase relaxation processes research performed by means of four-wave mixing technique in amorphous polymethylmethacrylate doped with rhodamine-101 molecules at room temperature are presented.

Keywords: photon echo, incoherent echo, broadband laser, optical dephasing, femtosecond relaxation, four-wave mixing, amorphous medium.

UDC: 535.2

Received: 28.02.2008