Cargando…

Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance

Hybrid nanocomposites can provide a promising platform for integrated optics. Optical nonlinearity can significantly widen the range of applications of such structures. In the present paper, a theoretical investigation is carried out by solving the density matrix equations derived for a metal nanopa...

Descripción completa

Detalles Bibliográficos
Autores principales: Tohari, Mariam M., Lyras, Andreas, AlSalhi, Mohamad S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6070961/
https://www.ncbi.nlm.nih.gov/pubmed/30002312
http://dx.doi.org/10.3390/nano8070521
_version_ 1783343774571692032
author Tohari, Mariam M.
Lyras, Andreas
AlSalhi, Mohamad S.
author_facet Tohari, Mariam M.
Lyras, Andreas
AlSalhi, Mohamad S.
author_sort Tohari, Mariam M.
collection PubMed
description Hybrid nanocomposites can provide a promising platform for integrated optics. Optical nonlinearity can significantly widen the range of applications of such structures. In the present paper, a theoretical investigation is carried out by solving the density matrix equations derived for a metal nanoparticles-graphene nanodisks-quantum dots hybrid system interacting with weak probe and strong control fields, in the steady state. We derive analytical expressions for linear and third-order nonlinear susceptibilities of the probe field. A giant self-Kerr nonlinear index of refraction is obtained in the optical region with relatively low light intensity. The optical absorption spectrum of the system demonstrates electromagnetically induced transparency and amplification without population inversion in the linear optical response arising from the negative real part of the polarizabilities for the plasmonic components at the energy of the localized surface plasmon resonance of the graphene nanodisks induced by the probe field. We find that the self-Kerr nonlinear optical properties of the system can be controlled by the geometrical features of the system, the size of metal nanoparticles and the strength of the control field. The controllable self-Kerr nonlinearities of hybrid nanocomposites can be employed in many interesting applications of modern integrated optics devices allowing for high nonlinearity with relatively low light intensity.
format Online
Article
Text
id pubmed-6070961
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-60709612018-08-09 Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance Tohari, Mariam M. Lyras, Andreas AlSalhi, Mohamad S. Nanomaterials (Basel) Article Hybrid nanocomposites can provide a promising platform for integrated optics. Optical nonlinearity can significantly widen the range of applications of such structures. In the present paper, a theoretical investigation is carried out by solving the density matrix equations derived for a metal nanoparticles-graphene nanodisks-quantum dots hybrid system interacting with weak probe and strong control fields, in the steady state. We derive analytical expressions for linear and third-order nonlinear susceptibilities of the probe field. A giant self-Kerr nonlinear index of refraction is obtained in the optical region with relatively low light intensity. The optical absorption spectrum of the system demonstrates electromagnetically induced transparency and amplification without population inversion in the linear optical response arising from the negative real part of the polarizabilities for the plasmonic components at the energy of the localized surface plasmon resonance of the graphene nanodisks induced by the probe field. We find that the self-Kerr nonlinear optical properties of the system can be controlled by the geometrical features of the system, the size of metal nanoparticles and the strength of the control field. The controllable self-Kerr nonlinearities of hybrid nanocomposites can be employed in many interesting applications of modern integrated optics devices allowing for high nonlinearity with relatively low light intensity. MDPI 2018-07-12 /pmc/articles/PMC6070961/ /pubmed/30002312 http://dx.doi.org/10.3390/nano8070521 Text en © 2018 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Article
Tohari, Mariam M.
Lyras, Andreas
AlSalhi, Mohamad S.
Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance
title Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance
title_full Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance
title_fullStr Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance
title_full_unstemmed Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance
title_short Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance
title_sort giant self-kerr nonlinearity in the metal nanoparticles-graphene nanodisks-quantum dots hybrid systems under low-intensity light irradiance
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6070961/
https://www.ncbi.nlm.nih.gov/pubmed/30002312
http://dx.doi.org/10.3390/nano8070521
work_keys_str_mv AT toharimariamm giantselfkerrnonlinearityinthemetalnanoparticlesgraphenenanodisksquantumdotshybridsystemsunderlowintensitylightirradiance
AT lyrasandreas giantselfkerrnonlinearityinthemetalnanoparticlesgraphenenanodisksquantumdotshybridsystemsunderlowintensitylightirradiance
AT alsalhimohamads giantselfkerrnonlinearityinthemetalnanoparticlesgraphenenanodisksquantumdotshybridsystemsunderlowintensitylightirradiance