A nonlinear switching mechanism in quantum dot and metallic nanoparticle hybrid systems
Second harmonic generation and two-photon photoluminescence in CdS quantum dots near metallic nanoparticles are theoretically and experimentally investigated. A control laser field is applied to the hybrid system, which couples with the surface plasmons of the metal nanoparticles. The polarized meta...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_21951071_v1_n6_p460_Cox |
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todo:paper_21951071_v1_n6_p460_Cox2023-10-03T16:40:23Z A nonlinear switching mechanism in quantum dot and metallic nanoparticle hybrid systems Cox, J.D. Singh, M.R. von Bilderling, C. Bragas, A.V. Hybrid nanomaterials Metallic nanoparticles Quantum dots Second harmonic generation Switching mechanisms Second harmonic generation and two-photon photoluminescence in CdS quantum dots near metallic nanoparticles are theoretically and experimentally investigated. A control laser field is applied to the hybrid system, which couples with the surface plasmons of the metal nanoparticles. The polarized metal nanoparticles then interact with the quantum dots through dipole-dipole interactions, which enhances the intensity of the second harmonic signal from the quantum dots. The density matrix method is used to numerically simulate the second harmonic signal emitted by the quantum dots. It is found that the enhancement of the second harmonic signal can be switched on and off by changing the control field intensity. Alternatively, the second harmonic signal enhancement can be turned on or off by changing the frequency of the control field. This is an interesting finding which can be used to fabricate nonlinear all optical nanoswitching devices from hybrid systems. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Fil:von Bilderling, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bragas, A.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_21951071_v1_n6_p460_Cox |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Hybrid nanomaterials Metallic nanoparticles Quantum dots Second harmonic generation Switching mechanisms |
| spellingShingle |
Hybrid nanomaterials Metallic nanoparticles Quantum dots Second harmonic generation Switching mechanisms Cox, J.D. Singh, M.R. von Bilderling, C. Bragas, A.V. A nonlinear switching mechanism in quantum dot and metallic nanoparticle hybrid systems |
| topic_facet |
Hybrid nanomaterials Metallic nanoparticles Quantum dots Second harmonic generation Switching mechanisms |
| description |
Second harmonic generation and two-photon photoluminescence in CdS quantum dots near metallic nanoparticles are theoretically and experimentally investigated. A control laser field is applied to the hybrid system, which couples with the surface plasmons of the metal nanoparticles. The polarized metal nanoparticles then interact with the quantum dots through dipole-dipole interactions, which enhances the intensity of the second harmonic signal from the quantum dots. The density matrix method is used to numerically simulate the second harmonic signal emitted by the quantum dots. It is found that the enhancement of the second harmonic signal can be switched on and off by changing the control field intensity. Alternatively, the second harmonic signal enhancement can be turned on or off by changing the frequency of the control field. This is an interesting finding which can be used to fabricate nonlinear all optical nanoswitching devices from hybrid systems. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| format |
JOUR |
| author |
Cox, J.D. Singh, M.R. von Bilderling, C. Bragas, A.V. |
| author_facet |
Cox, J.D. Singh, M.R. von Bilderling, C. Bragas, A.V. |
| author_sort |
Cox, J.D. |
| title |
A nonlinear switching mechanism in quantum dot and metallic nanoparticle hybrid systems |
| title_short |
A nonlinear switching mechanism in quantum dot and metallic nanoparticle hybrid systems |
| title_full |
A nonlinear switching mechanism in quantum dot and metallic nanoparticle hybrid systems |
| title_fullStr |
A nonlinear switching mechanism in quantum dot and metallic nanoparticle hybrid systems |
| title_full_unstemmed |
A nonlinear switching mechanism in quantum dot and metallic nanoparticle hybrid systems |
| title_sort |
nonlinear switching mechanism in quantum dot and metallic nanoparticle hybrid systems |
| url |
http://hdl.handle.net/20.500.12110/paper_21951071_v1_n6_p460_Cox |
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