On the influence of size factors and spectral properties of plasmonic nanorods for hot electron generation in optically modulated current sources
Alexander N. Yakunin1, Sergey V. Zarkov1, Yuri A. Avetisyan1, Garif G. Akchurin1,2, Valery V. Tuchin1,2,3; 1Institute of Precision Mechanics and Control, Federal Research Centre “Saratov Scientific Centre of the Russian Academy of Sciences”, Saratov, Russia; 2Department of Optics and Biophotonics and Science Medical Center, Saratov State University, Saratov, Russia; 3Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, Tomsk, Russia
Abstract
This paper presents the results of solving the problem of localizing the electric field intensity in the vicinity of plasmonic nanorods irradiated with an intense polarized electromagnetic wave and evaluating the efficiency of generating "hot" photoelectrons from their surface. Simultaneous calculation of the power of electrons induced by an external field, thermalized in the volume of the nanorod material, ensures correct determination of the optoelectronic and photothermal conversion coefficients. These parameters are critically important for identifying the maximum permissible irradiation modes for nanorods that differ in material and size, in terms of amplitude, duration, and pulse duty cycle. The obtained results are of interest to developers of optically controlled current sources for electronic devices with ultra-fast modulation.
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Alexander N. Yakunin
Institute of Precision Mechanics and Control, Federal Research Centre “Saratov Scientific Centre of the Russian Academy of Sciences”, Saratov
Russia
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