نتایج جستجو برای: localized plasmon

تعداد نتایج: 118565  

Journal: :Physical review letters 2003
David J Bergman Mark I Stockman

We make a step towards quantum nanoplasmonics: surface plasmon fields of a nanosystem are quantized and their stimulated emission is considered. We introduce a quantum generator for surface plasmon quanta and consider the phenomenon of surface plasmon amplification by stimulated emission of radiation (spaser). Spaser generates temporally coherent high-intensity fields of selected surface plasmo...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2008
Brian Stout J C Auger Alexis Devilez

A matrix balanced version of the recursive centered T matrix algorithm applicable to systems possessing resonant interparticle couplings is presented. Possible domains of application include systems containing interacting localized plasmon resonances, surface resonances, and photonic jet phenomena. This method is of particular interest when considering modifications to complex systems. The nume...

2007
Niels Asger Mortensen Min Qiu

Enhanced transmissions through a gold film with arrays of subwavelength holes are theoretically studied, employing the rigid full vectorial three dimensional finite difference time domain method. Influence of air-holes shape to the transmission is firstly studied, which confirms two different resonances attributing to the enhanced transmission: the localized waveguide resonance and periodic sur...

2008
Jing Zhao Aditi Das George C. Schatz Stephen G. Sligar Richard P. Van Duyne

A sensing method based on resonance localized surface plasmon spectroscopy was developed for low molecular weight substrate and inhibitor molecules binding to heme proteins. Cytochrome P450 proteins have Soret and Q absorption bands in the visible wavelength region. The coupling between the molecular resonance of P450 and the localized surface plasmon resonance (LSPR) of functionalized silver n...

Journal: :Expert review of molecular diagnostics 2004
Amanda J Haes Richard P Van Duyne

Miniature optical sensors that specifically identify low concentrations of environmental and biological substances are in high demand. Currently, there is no optical sensor that provides identification of the aforementioned species without amplification techniques at naturally occurring concentrations. Recently, it has been demonstrated that triangular silver nanoparticles have remarkable optic...

Journal: :Optics express 2008
Gaspar Armelles Juan Bautista González-Díaz Antonio García-Martín José Miguel García-Martín Alfonso Cebollada María Ujué González Srdjan Acimovic Jean Cesario Romain Quidant Gonçal Badenes

We study how the magneto-optical activity in polar configuration of continuous Au/Co/Au trilayers is affected by the excitation of localized plasmon resonances of an array of Au nanodiscs fabricated on top of them over a dielectric SiO(2) spacer. We show that the effect of the nanodiscs array is twofold. First, it optimizes the absorption of light at specific photon energies corresponding to th...

Journal: :Physical chemistry chemical physics : PCCP 2015
Hans-Christian Weissker Xóchitl López-Lozano

The localized surface-plasmon resonance of metal nanoparticles corresponds to a classical charge oscillation of the quasi-free conduction electrons. In the case of noble-metal nanoparticles, interband transitions from the d electrons influence the spectra strongly. In addition, the inhomogeneity of the nanoparticles at the atomistic level becomes important for small sizes. Using the time-evolut...

Journal: :Optics express 2010
Siew Lang Teo Vivian Kaixin Lin Renaud Marty Nicolas Large Esther Alarcon Llado Arnaud Arbouet Christian Girard Javier Aizpurua Sudhiranjan Tripathy Adnen Mlayah

In this work we report on the observation of surface plasmon properties of periodic arrays of gold nanoring trimers fabricated by electron beam lithography. It is shown that the localized surface plasmon resonances of such gold ring trimers occur in the infrared spectral region and are strongly influenced by the nanoring geometry and their relative positions. Based on numerical simulations of t...

Journal: :Optics express 2011
Nicolas Large Javier Aizpurua Vivian Kaixin Lin Siew Lang Teo Renaud Marty Sudhiranjan Tripathy Adnen Mlayah

Using numerical simulations, we demonstrate that fine shape details of gold nanoring-disks are responsible for significant modifications of their localized surface plasmon properties. The numerical results are supported by optical transmission measurements and by atomic force microscopy. In particular, we found that, depending on the ring wall sharpness, the spectral shift of the ring-like loca...

Journal: :Optics express 2012
Pradeep Senanayake Chung-Hong Hung Joshua Shapiro Adam Scofield Andrew Lin Benjamin S Williams Diana L Huffaker

We demonstrate 3D surface plasmon photoresponse in nanopillar arrays resulting in enhanced responsivity due to both Localized Surface Plasmon Resonances (LSPRs) and Surface Plasmon Polariton Bloch Waves (SPP-BWs). The LSPRs are excited due to a partial gold shell coating the nanopillar which acts as a 3D Nanopillar Optical Antenna (NOA) in focusing light into the nanopillar. Angular photorespon...

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