Emission dynamics and spectrum of a nanoshell-based plasmonic nanolaser spaser
We study theoretically the emission and lasing properties of a single nanoshell spaser nanoparticle with an active core and a plasmonic metal shell. Using time-dependent equations for the gain medium and metal, we calculate the lasing threshold through an instability analysis. Below threshold, the n...
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| Format: | Article |
| Language: | English |
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De Gruyter
2024-11-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2024-0491 |
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| _version_ | 1850163658136485888 |
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| author | Aradian Ashod Caicedo Karen Cathey Andres Mora Milena Recalde Nicole Infusino Melissa Veltri Alessandro |
| author_facet | Aradian Ashod Caicedo Karen Cathey Andres Mora Milena Recalde Nicole Infusino Melissa Veltri Alessandro |
| author_sort | Aradian Ashod |
| collection | DOAJ |
| description | We study theoretically the emission and lasing properties of a single nanoshell spaser nanoparticle with an active core and a plasmonic metal shell. Using time-dependent equations for the gain medium and metal, we calculate the lasing threshold through an instability analysis. Below threshold, the nanoshell acts as an optical amplifier when excited by an external probe field, while above threshold, it enters a regime of autonomous lasing. At the gain threshold, the lasing starts at one frequency, typically a plasmon resonance of the nanoparticle. With increasing gain, the emission then broadens to additional frequencies. This result contrasts with previous findings reporting only a single emission wavelength above threshold. We also compute the full spectrum and linewidth of the nanolaser, revealing strong frequency shifts and an asymmetrical lineshape. Finally, we demonstrate that the emission line can be tuned across the visible spectrum by modifying the aspect ratio of the nanoshell. |
| format | Article |
| id | doaj-art-13edb056d783443e84ebebc0bf5f7e51 |
| institution | OA Journals |
| issn | 2192-8614 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-13edb056d783443e84ebebc0bf5f7e512025-08-20T02:22:11ZengDe GruyterNanophotonics2192-86142024-11-0113264817483710.1515/nanoph-2024-0491Emission dynamics and spectrum of a nanoshell-based plasmonic nanolaser spaserAradian Ashod0Caicedo Karen1Cathey Andres2Mora Milena3Recalde Nicole4Infusino Melissa5Veltri Alessandro6University of Bordeaux, CNRS, CRPP, UMR 5031, F-33600Pessac, FranceInstitute of Applied Sciences and Intelligent Systems “Eduardo Caianiello” – ISASI-CNR, 80131, Napoli, ItalyMax Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748Garching, GermanyColegio de Ciencias e Ingeniera, 27902Universidad San Francisco de Quito, Quito, EcuadorColegio de Ciencias e Ingeniera, 27902Universidad San Francisco de Quito, Quito, EcuadorColegio de Ciencias e Ingeniera, 27902Universidad San Francisco de Quito, Quito, EcuadorColegio de Ciencias e Ingeniera, 27902Universidad San Francisco de Quito, Quito, EcuadorWe study theoretically the emission and lasing properties of a single nanoshell spaser nanoparticle with an active core and a plasmonic metal shell. Using time-dependent equations for the gain medium and metal, we calculate the lasing threshold through an instability analysis. Below threshold, the nanoshell acts as an optical amplifier when excited by an external probe field, while above threshold, it enters a regime of autonomous lasing. At the gain threshold, the lasing starts at one frequency, typically a plasmon resonance of the nanoparticle. With increasing gain, the emission then broadens to additional frequencies. This result contrasts with previous findings reporting only a single emission wavelength above threshold. We also compute the full spectrum and linewidth of the nanolaser, revealing strong frequency shifts and an asymmetrical lineshape. Finally, we demonstrate that the emission line can be tuned across the visible spectrum by modifying the aspect ratio of the nanoshell.https://doi.org/10.1515/nanoph-2024-0491nanolaserspasernanoparticlegainemission spectrumplasmon resonance |
| spellingShingle | Aradian Ashod Caicedo Karen Cathey Andres Mora Milena Recalde Nicole Infusino Melissa Veltri Alessandro Emission dynamics and spectrum of a nanoshell-based plasmonic nanolaser spaser Nanophotonics nanolaser spaser nanoparticle gain emission spectrum plasmon resonance |
| title | Emission dynamics and spectrum of a nanoshell-based plasmonic nanolaser spaser |
| title_full | Emission dynamics and spectrum of a nanoshell-based plasmonic nanolaser spaser |
| title_fullStr | Emission dynamics and spectrum of a nanoshell-based plasmonic nanolaser spaser |
| title_full_unstemmed | Emission dynamics and spectrum of a nanoshell-based plasmonic nanolaser spaser |
| title_short | Emission dynamics and spectrum of a nanoshell-based plasmonic nanolaser spaser |
| title_sort | emission dynamics and spectrum of a nanoshell based plasmonic nanolaser spaser |
| topic | nanolaser spaser nanoparticle gain emission spectrum plasmon resonance |
| url | https://doi.org/10.1515/nanoph-2024-0491 |
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