نتایج جستجو برای: localized surface plasmon resonance

تعداد نتایج: 923110  

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...

Journal: :Nano letters 2006
M V Bashevoy F Jonsson A V Krasavin N I Zheludev Y Chen M I Stockman

The injection of a beam of free 50 keV electrons into an unstructured gold surface creates a highly localized source of traveling surface plasmons with spectra centered below the surface plasmon resonance frequency. The plasmons were detected by a controlled decoupling into light with a grating at a distance from the excitation point. The dominant contribution to the plasmon generation appears ...

Journal: :Optics express 2012
Neha Nehru Eugenii U Donev Gazi M Huda Linliang Yu Yinan Wei J Todd Hastings

We demonstrate a novel localized surface-plasmon resonance sensor that can distinguish surface binding interactions from interfering bulk effects. This is accomplished by utilizing the longitudinal and transverse plasmon modes of gold nanorods. We have investigated, both numerically and experimentally, the effect of change in background refractive index and surface binding on the two resonances...

2015
Caiwang Ge Yifei Tao Zhongyi Guo

Because of the sensitivity to refractive index changes, plasmonics nanostructures have been investigated broadly for the bio-molecules detection through the excitations of the propagating surface plasmon resonance (PSPR) or localized surface plasmon resonance (LSPR). PSPR sensors can detect sub-monolayer quantities of bio-molecules at the gold film surface and provide real-time data through con...

Journal: :international journal of optics and photonics 0
jalil jafari no. 444, prof. yousef sobouti blvd. p. o. box 45195-1159 zanjan iran rahman nouroozi no. 444, prof. yousef sobouti blvd. p. o. box 45195-1159 zanjan iran

for a fiber optical surface plasmon resonance (spr) sensor a short part of its cladding should be removed to coat a thin layer of a metal. usually this is problematic when an optical fiber with small core diameter is used. in this paper, a new method using µliter droplet of the hf acid for short fiber optical taper fabrication is reported. using this method in a multi-mode optical fiber with th...

Journal: :iranian chemical communication 0
professor mohammad ali karimi department of chemistry, payame noor university, p.o. box 19395-4697, tehran, iran malihe alsadat mozaheb department of chemistry, payame noor university, p.o. box 19395-4697, tehran, iran abdolhamid hatefi-mehrjardi department of chemistry, payame noor university, p.o. box 19395-4697, tehran, iran hossein tavallali department of chemistry, payame noor university, p.o. box 19395-4697, tehran, iran abdol mohammad attaran department of chemistry, payame noor university, p.o. box 19395-4697, tehran, iran

in this paper, multivariate calibration methods of partial least squares (pls) and principle component regression (pcr) were investigated in simultaneously determination of hydrazine (hz) and acetylhydrazine (ahz). the aforementioned methods are based on formation of the silver nanoparticles (agnps) from the reaction of hz and ahz with ag+ ions as oxidizing agent in the presence of citrate ions...

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