Тип публикации: статья из журнала
Год издания: 2014
Идентификатор DOI: 10.1364/JOSAB.31.002981
Ключевые слова: Aspect ratio, Computer simulation, Dispersions, Electromagnetic pulse, Light pulse generators, Metal nanoparticles, Permittivity, Silver, Waveguides, Dielectric permittivities, Dipole approximation, Discrete dispersion relation, Electromagnetic interactions, Femtosecond optical pulse, Silver nanoparticles, Small aspect ratio, Waveguiding properties, Chains
Аннотация: We study numerically the discrete dispersion relations and waveguiding properties of relatively short linear chains of spherical and spheroidal silver nanoparticles. Simulations are based on the Drude model for the dielectric permittivity of metal and on the dipole approximation for the electromagnetic interaction of particles. We Показать полностьюalso simulate the dynamics of femtosecond optical pulse propagation along such chains. In the case that we consider (10 particles per chain), reflections from the chain terminals play a significant detrimental role. We show that dissipative traps can be used to reduce the effects of reflections. We also show that chains composed of oblate spheroids with sufficiently small aspect ratio (nanodisks) have better waveguiding properties when compared to chains made of particles with other spheroidal shapes. This includes a slower rate of decay, larger group velocity, and larger bandwidth. (C) 2014 Optical Society of America
Журнал: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Выпуск журнала: Vol. 31, Is. 12
Номера страниц: 2981-2989
ISSN журнала: 07403224
Место издания: WASHINGTON
Издатель: OPTICAL SOC AMER