Arkadii Krokhin, Ph.D (Edit)
Professor
Office: GAB 525J
Phone: (940) 565-3968
arkady@unt.edu
ยป UNT Faculty Profile Ph.D (Kiev State University (Ukraine), 1983) Research interest: Nonlinear Dynamics and Complex Systems , Solid State Physics. Solid-state physics; dynamical systems; quantum chaos.
Image charges enhance radiation from semiconductor light sources
Arkadii Krokhin
Currently, it is understood that the carrier recombination rate in semiconductors can be modified by metals due to pure electrodynamic interactions through surface plasmons. Here I report theoretical prediction and experimental confirmation of a new electrostatic mechanism of light enhancement. Arising from Coulomb attraction of electrons and holes to their electrostatic images in metal, this mechanism produces large carrier concentrations near metallic nanoparticles. Increased concentration results in increased quantum efficiency and enhances the rate of e-h recombination. The proposed fundamental mechanism provides a new perspective for improving the efficiency of broadband light emitters.