Giant Electric Field Enhancement and Localized Surface Plasmon Resonance by Optimizing Contour Bowtie Nanoantennas

2013 ◽  
Vol 117 (47) ◽  
pp. 25004-25011 ◽  
Author(s):  
Li-Wei Nien ◽  
Shih-Che Lin ◽  
Bo-Kai Chao ◽  
Miin-Jang Chen ◽  
Jia-Han Li ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Electric Field ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Field Enhancement ◽  
Localized Surface Plasmon ◽  
Electric Field Enhancement

scholarly journals Effect of Geometrical Properties on Localized Surface Plasmon Resonance of Gold Nanoparticles

2021 ◽  
Vol 31 (4) ◽  
Author(s):  
Luong Lam Nguyen ◽  
Quoc Trung Trinh ◽  
Quang Bao Tu ◽  
Van Quynh Nguyen ◽  
Thi Hong Cam Hoang
Keyword(s):  
Gold Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Electric Field ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Surrounding Medium ◽  
Localized Surface Plasmon ◽  
Geometrical Properties ◽  
Electric Field Profile

This work reportson plasmonic effects (i.e light scattering and absorption properties) induced by two different gold nanoparticles (AuNPs)-shaped: spherical particle and triangular particle. The scattering cross-section and electric field profiles have been investigated by using theboundary element method (MNPBEM toolbox). Two configurations: the isolated AuNPand the coupledtwo-gold NPsystem have been considered to evaluate the localized surface plasmon resonance (LSPR) in eithersingle or coupled AuNPstructures. The effect of the surrounding medium on the scattering behavior of the NPs has also been examined. Then the dependence of “hotspot” intensity on the distance between two NPs has been recognized by mapping the electric field profile. The obtained results can be used as the guidelines for synthesizing AuNP structures to employ LSPR for sensing or other applications.

scholarly journals Nanoplasmonics in High Pressure Environment

Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 53 ◽  
Author(s):  
Grégory Barbillon
Keyword(s):  
High Pressure ◽  
Surface Plasmon Resonance ◽  
Electric Field ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Plasmonic Nanostructures ◽  
Resonance Shift ◽  
High Pressure Environment

An explosion in the interest for nanoplasmonics has occurred in order to realize optical devices, biosensors, and photovoltaic devices. The plasmonic nanostructures are used for enhancing and confining the electric field. In the specific case of biosensing, this electric field confinement can induce the enhancement of the Raman signal of different molecules, or the localized surface plasmon resonance shift after the detection of analytes on plasmonic nanostructures. A major part of studies concerning to plasmonic modes and their application to sensing of analytes is realized in ambient environment. However, over the past decade, an emerging subject of nanoplasmonics has appeared, which is nanoplasmonics in high pressure environment. In last five years (2015–2020), the latest advances in this emerging field and its application to sensing were carried out. This short review is focused on the pressure effect on localized surface plasmon resonance of gold nanosystems, the supercrystal formation of plasmonic nanoparticles stimulated by high pressure, and the detection of molecules and phase transitions with plasmonic nanostructures in high pressure environment.

scholarly journals Surface Plasmon Resonance in Periodic Hexagonal Lattice Arrays of Silver Nanodisks

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Jinlian Hu ◽  
Cong Wang ◽  
Shikuan Yang ◽  
Fei Zhou ◽  
Zhigang Li ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Electric Field ◽  
Data Storage ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Strong Dependence ◽  
Hexagonal Lattice ◽  
Field Enhancement ◽  
Electric Field Enhancement ◽  
Range Interaction

The surface plasmon resonance (SPR) of periodic hexagonal lattice arrays of silver nano-disks positioned on glass slides is studied using finite-difference time domain (FDTD) simulations. We investigate numerically the influence of diameter of nano-disks and the gap between nano-disks on SPR transmission spectra and electric field enhancement. We find a strong dependence of resonance wavelength on diameter of the nanodisks. With increasing the gap, electric field enhancement factor could significantly increase and reach a maximum value, which indicates that a special long-range interaction plays an important role. This study is useful for optical modulation applied in near or far field optics, sensing and data storage, and solar cell.

scholarly journals High Near-Field Enhancement in Plasmonic Coupled Nanostructure for Spaser Application

2021 ◽  
Author(s):  
SAQIB JAMIL ◽  
Adnan Daud Khan ◽  
Javed Iqbal ◽  
Waqas Farooq
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Near Field ◽  
Field Enhancement ◽  
Surface Enhanced Raman Spectroscopy ◽  
Localized Surface Plasmon ◽  
Film Substrate ◽  
Gain Media

Abstract We theoretically demonstrated a kind of plasmon coupled elliptical nanostructure to achieve a vast range of applications based on nanolaser or spaser with high intensity. To overcome the ohmic losses, the plasmon ellipse is composed of the gold film substrate with a gain media. A simple ellipse has been chosen from which variety of dimer configurations have been formed by symmetry alteration technique which are then tested for different light polarizations and gap variations. The proposed model supports localized surface plasmon resonance mode (LSPR). Moreover, the localized surface plasmon resonance (LSPR) property of the proposed nanostructure is numerically analysed by the finite-element method (FEM) and the results shows that the electric field intensity (EFI) can be amplified to a large values by symmetry breaking in the elliptical nanostructure. Various plasmon modes can be excited by selecting the appropriate gain media. In addition to this, a compact tunable multi-wavelength nanolaser (spaser) can be developed by using this model. Giant near field enhancement (NFE) and high LSPR enable this structure to be promising for spaser applications such as surface enhanced Raman spectroscopy, sensing, lithography, imaging, dental applications and much more.

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