A Novel Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid-System-Based Spaser
Active nanoplasmonics have recently led to the emergence of many promising applications. One of them is the spaser (surface plasmons amplification by stimulated emission of radiation) that has been shown to generate coherent and intense fields of selected surface plasmon modes that are strongly loca...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/3/416 |
| _version_ | 1818328564455440384 |
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| author | Mariam M. Tohari Andreas Lyras Mohamad S. AlSalhi |
| author_facet | Mariam M. Tohari Andreas Lyras Mohamad S. AlSalhi |
| author_sort | Mariam M. Tohari |
| collection | DOAJ |
| description | Active nanoplasmonics have recently led to the emergence of many promising applications. One of them is the spaser (surface plasmons amplification by stimulated emission of radiation) that has been shown to generate coherent and intense fields of selected surface plasmon modes that are strongly localized in the nanoscale. We propose a novel nanospaser composed of a metal nanoparticles-graphene nanodisks hybrid plasmonic system as its resonator and a quantum dots cascade stack as its gain medium. We derive the plasmonic fields induced by pulsed excitation through the use of the effective medium theory. Based on the density matrix approach and by solving the Lindblad quantum master equation, we analyze the ultrafast dynamics of the spaser associated with coherent amplified plasmonic fields. The intensity of the plasmonic field is significantly affected by the width of the metallic contact and the time duration of the laser pulse used to launch the surface plasmons. The proposed nanospaser shows an extremely low spasing threshold and operates in the mid-infrared region that has received much attention due to its wide biomedical, chemical and telecommunication applications. |
| first_indexed | 2024-12-13T12:34:10Z |
| format | Article |
| id | doaj.art-eb0b314f775a429b9d97d26bd9cca455 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-13T12:34:10Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-eb0b314f775a429b9d97d26bd9cca4552022-12-21T23:45:55ZengMDPI AGNanomaterials2079-49912020-02-0110341610.3390/nano10030416nano10030416A Novel Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid-System-Based SpaserMariam M. Tohari0Andreas Lyras1Mohamad S. AlSalhi2Department of Physics, College of Science, King Khalid University, P.O. Box 9004, Abha 62529, Saudi ArabiaDepartment of Physics and Astronomy, College of Science, King Saud University, P. O. Box 11451, Riyadh 11451, Saudi ArabiaDepartment of Physics and Astronomy, College of Science, King Saud University, P. O. Box 11451, Riyadh 11451, Saudi ArabiaActive nanoplasmonics have recently led to the emergence of many promising applications. One of them is the spaser (surface plasmons amplification by stimulated emission of radiation) that has been shown to generate coherent and intense fields of selected surface plasmon modes that are strongly localized in the nanoscale. We propose a novel nanospaser composed of a metal nanoparticles-graphene nanodisks hybrid plasmonic system as its resonator and a quantum dots cascade stack as its gain medium. We derive the plasmonic fields induced by pulsed excitation through the use of the effective medium theory. Based on the density matrix approach and by solving the Lindblad quantum master equation, we analyze the ultrafast dynamics of the spaser associated with coherent amplified plasmonic fields. The intensity of the plasmonic field is significantly affected by the width of the metallic contact and the time duration of the laser pulse used to launch the surface plasmons. The proposed nanospaser shows an extremely low spasing threshold and operates in the mid-infrared region that has received much attention due to its wide biomedical, chemical and telecommunication applications.https://www.mdpi.com/2079-4991/10/3/416spaserplasmonic amplifiersgraphene nanodisksmetal nanoparticlesquantum dots cascade emitters |
| spellingShingle | Mariam M. Tohari Andreas Lyras Mohamad S. AlSalhi A Novel Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid-System-Based Spaser Nanomaterials spaser plasmonic amplifiers graphene nanodisks metal nanoparticles quantum dots cascade emitters |
| title | A Novel Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid-System-Based Spaser |
| title_full | A Novel Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid-System-Based Spaser |
| title_fullStr | A Novel Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid-System-Based Spaser |
| title_full_unstemmed | A Novel Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid-System-Based Spaser |
| title_short | A Novel Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid-System-Based Spaser |
| title_sort | novel metal nanoparticles graphene nanodisks quantum dots hybrid system based spaser |
| topic | spaser plasmonic amplifiers graphene nanodisks metal nanoparticles quantum dots cascade emitters |
| url | https://www.mdpi.com/2079-4991/10/3/416 |
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