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Proceedings Paper

Transient pump-probe absorption spectroscopy of semiconductor nanodumbbells
Author(s): Mikhail Yu. Leonov; Ivan D. Rukhlenko; Anvar S. Baimuratov; Alexander V. Baranov; Yurii K. Gun'ko; Anatoly V. Fedorov
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Paper Abstract

We develop a theory of time-resolved pump–probe optical spectroscopy for modelling interband absorption by an anisotropic semiconductor nanodumbbell. By considering three transition schemes where the pump and probe pulses are nearly resonant to a dipole-allowed interband transition of different elements of the nanodumbbell, and assuming that the populations of the exited states are coupled through the nonradiative relaxation processes, we analytically calculate the absorption efficiency of the probe as a function of its delay from the pump for relatively short pulses. The obtained functional dependency, being the sum of exponentials with exponents proportional to the energy relaxation rates of the excited electronic states, is useful for the analysis of experimental absorption spectra aiming at retrieving the relaxation parameters of the nanodumbbell’s electronic subsystem.

Paper Details

Date Published: 2 May 2014
PDF: 8 pages
Proc. SPIE 9126, Nanophotonics V, 91262C (2 May 2014); doi: 10.1117/12.2051755
Show Author Affiliations
Mikhail Yu. Leonov, National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)
Ivan D. Rukhlenko, Monash Univ. (Australia)
National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)
Anvar S. Baimuratov, National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)
Alexander V. Baranov, National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)
Yurii K. Gun'ko, National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)
Trinity College Dublin (Ireland)
Anatoly V. Fedorov, National Research Univ. of Information Technologies, Mechanics and Optics (Russian Federation)


Published in SPIE Proceedings Vol. 9126:
Nanophotonics V
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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