Plasmon-exciton coupling in nanostructured metal-semiconductor composite films
Viktoriia V. Savchuk,
Roman V. Gamernyk,
Ihor S. Virt,
Serhiy Z. Malynych,
Anatoliy O. Pinchuk
Affiliations
Viktoriia V. Savchuk
Department of Physics and Energy Sciences, University of Colorado Colorado Springs, and Center for Biofrontiers Institute, University of Colorado, 1420 Austin Bluffs Parkway 80918, Colorado Springs, Colorado, USA
Roman V. Gamernyk
Department of Physics, Ivan Franko National University of Lviv, 79005 Lviv, Ukraine
Ihor S. Virt
Department of Engineering Science and Technology, Ivan Franko Drogobych State Pedagogical University, 82106 Drogobych, Ukraine
Serhiy Z. Malynych
Department of Electromechanics and Electronics, Hetman Petro Sahaidachnyi National Army Academy, 79012 Lviv, Ukraine
Anatoliy O. Pinchuk
Department of Physics and Energy Sciences, University of Colorado Colorado Springs, and Center for Biofrontiers Institute, University of Colorado, 1420 Austin Bluffs Parkway 80918, Colorado Springs, Colorado, USA
Nonlinear optical response of metal-semiconductor Zn0.8Co0.2O/Au nanocomposite films was studied experimentally and theoretically. Z-scan measurements revealed a positive nonlinear index of refraction of the composite film. Fluorescent spectroscopy measurements exhibited a narrow sharp peak that might be attributed to exciton peak of semiconductor nanostructured thin film enhanced by nearby gold nanoparticles. Classical electrodynamic calculations of a quantum dot in close proximity to a gold nanoparticle agree well with the experimentally observed normalized quantum efficiency.
