Effect of Intertip Coupling on the Plasmonic Behavior of Individual Multitipped Gold Nanoflower

Achyut Maity; Arpan Maiti; Pabitra Das; Dulal Senapati; Tapas Kumar Chini

doi:10.1021/ph500309j

Effect of Intertip Coupling on the Plasmonic Behavior of Individual Multitipped Gold Nanoflower

Achyut Maity, Arpan Maiti, Pabitra Das, Dulal Senapati, Tapas Kumar Chini

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

We report here, the first experimental realization on the selective excitation of two closely lying tips from the same spherical core of a multitipped gold nanoparticle with flower-like morphology. This gives strong multipeaked resonance in the near-infrared region of the far-field emission spectra showing a clear signature of tip to tip coupling. The cathodoluminescence (CL) technique in a scanning electron microscope (SEM) combined with finite-difference time-domain (FDTD) simulation has helped us to identify the coupled plasmon modes to be originated from the interaction between two closely spaced tips with a narrow angular separation. Our analysis further estimates a range of angular separation between the tips that triggers the onset of the intertip coupling. (Graph Presented).

Original language	English
Pages (from-to)	1290-1297
Number of pages	8
Journal	ACS Photonics
Volume	1
Issue number	12
DOIs	https://doi.org/10.1021/ph500309j
State	Published - 17 Dec 2014
Externally published	Yes

Keywords

FDTD simulation
cathodoluminescence
electron beam spectroscopy
gold nanostar
localized surface plasmon resonance

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biotechnology
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1021/ph500309j

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title = "Effect of Intertip Coupling on the Plasmonic Behavior of Individual Multitipped Gold Nanoflower",

abstract = "We report here, the first experimental realization on the selective excitation of two closely lying tips from the same spherical core of a multitipped gold nanoparticle with flower-like morphology. This gives strong multipeaked resonance in the near-infrared region of the far-field emission spectra showing a clear signature of tip to tip coupling. The cathodoluminescence (CL) technique in a scanning electron microscope (SEM) combined with finite-difference time-domain (FDTD) simulation has helped us to identify the coupled plasmon modes to be originated from the interaction between two closely spaced tips with a narrow angular separation. Our analysis further estimates a range of angular separation between the tips that triggers the onset of the intertip coupling. (Graph Presented).",

keywords = "FDTD simulation, cathodoluminescence, electron beam spectroscopy, gold nanostar, localized surface plasmon resonance",

author = "Achyut Maity and Arpan Maiti and Pabitra Das and Dulal Senapati and Chini, {Tapas Kumar}",

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T1 - Effect of Intertip Coupling on the Plasmonic Behavior of Individual Multitipped Gold Nanoflower

AU - Maity, Achyut

AU - Maiti, Arpan

AU - Das, Pabitra

AU - Senapati, Dulal

AU - Chini, Tapas Kumar

PY - 2014/12/17

Y1 - 2014/12/17

N2 - We report here, the first experimental realization on the selective excitation of two closely lying tips from the same spherical core of a multitipped gold nanoparticle with flower-like morphology. This gives strong multipeaked resonance in the near-infrared region of the far-field emission spectra showing a clear signature of tip to tip coupling. The cathodoluminescence (CL) technique in a scanning electron microscope (SEM) combined with finite-difference time-domain (FDTD) simulation has helped us to identify the coupled plasmon modes to be originated from the interaction between two closely spaced tips with a narrow angular separation. Our analysis further estimates a range of angular separation between the tips that triggers the onset of the intertip coupling. (Graph Presented).

AB - We report here, the first experimental realization on the selective excitation of two closely lying tips from the same spherical core of a multitipped gold nanoparticle with flower-like morphology. This gives strong multipeaked resonance in the near-infrared region of the far-field emission spectra showing a clear signature of tip to tip coupling. The cathodoluminescence (CL) technique in a scanning electron microscope (SEM) combined with finite-difference time-domain (FDTD) simulation has helped us to identify the coupled plasmon modes to be originated from the interaction between two closely spaced tips with a narrow angular separation. Our analysis further estimates a range of angular separation between the tips that triggers the onset of the intertip coupling. (Graph Presented).

KW - FDTD simulation

KW - cathodoluminescence

KW - electron beam spectroscopy

KW - gold nanostar

KW - localized surface plasmon resonance

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Effect of Intertip Coupling on the Plasmonic Behavior of Individual Multitipped Gold Nanoflower

Abstract

Keywords

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