Waveguiding properties of short linear chains of nonspherical metal nanoparticles

Описание

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

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Издание

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

Авторы

  • Rasskazov Ilia L. (LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia; Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660041, Russia)
  • Karpov Sergei V. (LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia; Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660041, Russia; Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia)
  • Markel Vadim A. (Univ Penn, Dept Radiol, Philadelphia, PA 19104 USA; Univ Penn, Dept Bioengn, Philadelphia, PA 19104 USA; Univ Penn, Grad Grp Appl Math & Computat Sci, Philadelphia, PA 19104 USA)

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