Surface-plasmon optomagnetic field enhancement for all-optical magnetization switching (Conference Presentation)

2018 ◽  
Author(s):  
Aveek Dutta ◽  
Alexander V. Kildishev ◽  
Vladimir M. Shalaev ◽  
Alexandra Boltasseva ◽  
Ernesto E. Marinero
Keyword(s):  
Surface Plasmon ◽  
Field Enhancement ◽  
Magnetization Switching ◽  
All Optical

scholarly journals Surface-plasmon opto-magnetic field enhancement for all-optical magnetization switching

2017 ◽  
Vol 7 (12) ◽  
pp. 4316 ◽  
Author(s):  
Aveek Dutta ◽  
Alexander V. Kildishev ◽  
Vladimir M. Shalaev ◽  
Alexandra Boltasseva ◽  
Ernesto E. Marinero
Keyword(s):  
Magnetic Field ◽  
Surface Plasmon ◽  
Field Enhancement ◽  
Magnetization Switching ◽  
All Optical ◽  
Magnetic Field Enhancement

scholarly journals Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1728
Author(s):  
Joshua Fernandes ◽  
Sangmo Kang
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Surface Plasmon Resonance ◽  
Aspect Ratio ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Shell Thickness ◽  
Numerical Study ◽  
Field Enhancement ◽  
Core Shell

The near-field enhancement and localized surface plasmon resonance (LSPR) on the core-shell noble metal nanostructure surfaces are widely studied for various biomedical applications. However, the study of the optical properties of new plasmonic non-spherical nanostructures is less explored. This numerical study quantifies the optical properties of spherical and non-spherical (prolate and oblate) dimer nanostructures by introducing finite element modelling in COMSOL Multiphysics. The surface plasmon resonance peaks of gold nanostructures should be understood and controlled for use in biological applications such as photothermal therapy and drug delivery. In this study, we find that non-spherical prolate and oblate gold dimers give excellent tunability in a wide range of biological windows. The electromagnetic field enhancement and surface plasmon resonance peak can be tuned by varying the aspect ratio of non-spherical nanostructures, the refractive index of the surrounding medium, shell thickness, and the distance of separation between nanostructures. The absorption spectra exhibit considerably greater dependency on the aspect ratio and refractive index than the shell thickness and separation distance. These results may be essential for applying the spherical and non-spherical nanostructures to various absorption-based applications.

scholarly journals Estimation of resonance characteristics of single-layer surface-plasmon sensors in liquid solutions using Fano’s approximation in the visible and infrared regions

2019 ◽  
Vol 43 (4) ◽  
pp. 596-604 ◽  
Author(s):  
D.V. Nesterenko ◽  
R.A. Pavelkin ◽  
S. Hayashi
Keyword(s):  
Surface Plasmon ◽  
Single Layer ◽  
Field Enhancement ◽  
Coupled Mode Theory ◽  
Mid Infrared ◽  
Coupled Mode ◽  
Sensing Applications ◽  
Resonance Response ◽  
Liquid Solutions ◽  
Support Excitation

In this work, we consider the use of planar sensing structures, which support excitation of surface plasmon polarition (SPP) modes, for detecting changes in solvents, i.e. water, ethanol, isopropanol. In the structures under study, SPP modes propagate along the interfaces between metals and general solvents. The analysis of characteristics of the resonance response is based on Fano’s approximation within the coupled-mode theory in the visible and infrared regions. The maximum sensitivity and field enhancement are revealed in the near- and mid-infrared regions in the case of ethanol and isopropanol, which enables sensing applications beyond the regions of water absorption.

Large field enhancement and perfect absorption by coupling between dark plasmon mode and surface plasmon polaritons

2018 ◽  
Vol 47 (3) ◽  
pp. 301-306
Author(s):  
Nian Gao ◽  
Junqiao Wang ◽  
Jia Zhang ◽  
Shu Chen ◽  
Erjun Liang ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Field Enhancement ◽  
Plasmon Mode ◽  
Large Field ◽  
Perfect Absorption ◽  
Plasmon Polaritons

Investigating Opto-Electronic Properties of Surface Plasmon Structure for Spectroscopic Applications

2019 ◽  
pp. 216-276
Author(s):  
Pratibha Verma ◽  
Arpan Deyasi
Keyword(s):  
Surface Plasmon ◽  
Incidence Angle ◽  
Structural Parameters ◽  
Metal Layer ◽  
Damping Ratio ◽  
Characteristic Impedance ◽  
Field Enhancement ◽  
Wavelength Dependence ◽  
Allowable Limit ◽  
Layer Medium

This chapter is proposed with an approach to analyze reflectance as a function of negative index material thickness for different parameters under the surface plasmon condition and extended approach towards the field enhancement of electric field as function of incidence angle and transmittance as function of incidence angle has been analyzed. This chapter can reflect the good comparison between 3 layer medium and n layer medium model. Characteristic impedance of MIM surface plasmon structure is analytically calculated considering the effect of both Faraday inductance and kinetic inductance. Effect of metal layer thickness, insulator thickness, and electron density are tailored to observe the impedance variation with frequency. Wavelength dependence of characteristic impedance and quality factor of MIM (metal-insulator-metal) surface plasmon structure is analyzed. Structural parameters and damping ratio of the structure is tuned within allowable limit to analyze the variation after detailed analytical computation.

Properties of Nanomaterials and Environment

2019 ◽  
pp. 28-43
Author(s):  
Phool Shahzadi
Keyword(s):  
Optical Properties ◽  
Metal Oxides ◽  
Surface Plasmon ◽  
Field Enhancement ◽  
Visible Absorption ◽  
Plasmon Absorption ◽  
Sensor Applications ◽  
Timely Review ◽  
Strong Surface ◽  
Metal Nanomaterials

The chapter provides a timely review of the various properties of nonmaterial and their applications into environmental compartments. An extensive variety of poisonous chemicals is discharged into the environment because of globalization and industrialization. The dimensional, compositional, geometric, and structural properties are fundamental to convey usefulness of the nanomaterials. The controlled sizes and shapes of nanoparticles are anticipated to yield unique catalytic, electrochemical, and photochemical properties. The electrochemical properties of monolayer-functional metal nanoparticles are expected to be controlled by the particle sizes. Metal nanomaterials have interesting optical properties due to strong surface plasmon absorption and field enhancement effects; metal oxides lack visible absorption due to very large bandgap. Nanocomposites have complex optical properties. Nanomaterials present gigantic advantages on diverse applications, catalysis, imaging, biotechnological, and sensor applications due to their improved properties.

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