Critical coupling in plasmonic chain for efficient energy trapping
Abstract Plasmonic nanoparticles can concentrate energy at the nanometer scale, offering promising applications across multiple fields such as lab-on-chip technologies and photonic circuits. A crucial requirement for these applications is achieving efficient coupling between the nanoparticles and th...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-05446-7 |
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| author | Marius Crouzier Fei Mao Giovanni Magno Vy Yam Carlos Alonso-Ramos Jean-René Coudevylle Etienne Herth Christophe Dupuis Xavier Leroux Thomas Lopez Béatrice Dagens |
| author_facet | Marius Crouzier Fei Mao Giovanni Magno Vy Yam Carlos Alonso-Ramos Jean-René Coudevylle Etienne Herth Christophe Dupuis Xavier Leroux Thomas Lopez Béatrice Dagens |
| author_sort | Marius Crouzier |
| collection | DOAJ |
| description | Abstract Plasmonic nanoparticles can concentrate energy at the nanometer scale, offering promising applications across multiple fields such as lab-on-chip technologies and photonic circuits. A crucial requirement for these applications is achieving efficient coupling between the nanoparticles and the excitation signal. Plasmonic nanoparticle chains can guide light at subwavelength scale and can be excited through coupling to a dielectric waveguide. In this manuscript, we propose a novel configuration for the plasmonic chain-dielectric waveguide structure that allows the chain to be freely positioned relative to the waveguide. We demonstrate the existence of a critical coupling regime between a silicon waveguide and a plasmonic chain, achieved through precise control of their separation. In this regime, the plasmonic chain transitions from its well-known transmission mode to a new cavity state, trapping 99% of the waveguide’s energy. This result paves the way for efficiently addressing nanostructures through integrated waveguides, enabling efficient optical nano-tweezers, sensors or nano-heaters. |
| format | Article |
| id | doaj-art-a0b07e78c92c489b95f98ee16685fe8a |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-a0b07e78c92c489b95f98ee16685fe8a2025-08-20T03:38:16ZengNature PortfolioScientific Reports2045-23222025-07-0115111010.1038/s41598-025-05446-7Critical coupling in plasmonic chain for efficient energy trappingMarius Crouzier0Fei Mao1Giovanni Magno2Vy Yam3Carlos Alonso-Ramos4Jean-René Coudevylle5Etienne Herth6Christophe Dupuis7Xavier Leroux8Thomas Lopez9Béatrice Dagens10Université Paris-Saclay, CNRS, Centre de Nanosciences et de NanotechnologiesUniversité Paris-Saclay, CNRS, Centre de Nanosciences et de NanotechnologiesDepartment of Electrical and Information Engineering, Polytechnic University of BariUniversité Paris-Saclay, CNRS, Centre de Nanosciences et de NanotechnologiesUniversité Paris-Saclay, CNRS, Centre de Nanosciences et de NanotechnologiesUniversité Paris-Saclay, CNRS, Centre de Nanosciences et de NanotechnologiesUniversité Paris-Saclay, CNRS, Centre de Nanosciences et de NanotechnologiesUniversité Paris-Saclay, CNRS, Centre de Nanosciences et de NanotechnologiesUniversité Paris-Saclay, CNRS, Centre de Nanosciences et de NanotechnologiesCentre technique de Vélizy, StellantisUniversité Paris-Saclay, CNRS, Centre de Nanosciences et de NanotechnologiesAbstract Plasmonic nanoparticles can concentrate energy at the nanometer scale, offering promising applications across multiple fields such as lab-on-chip technologies and photonic circuits. A crucial requirement for these applications is achieving efficient coupling between the nanoparticles and the excitation signal. Plasmonic nanoparticle chains can guide light at subwavelength scale and can be excited through coupling to a dielectric waveguide. In this manuscript, we propose a novel configuration for the plasmonic chain-dielectric waveguide structure that allows the chain to be freely positioned relative to the waveguide. We demonstrate the existence of a critical coupling regime between a silicon waveguide and a plasmonic chain, achieved through precise control of their separation. In this regime, the plasmonic chain transitions from its well-known transmission mode to a new cavity state, trapping 99% of the waveguide’s energy. This result paves the way for efficiently addressing nanostructures through integrated waveguides, enabling efficient optical nano-tweezers, sensors or nano-heaters.https://doi.org/10.1038/s41598-025-05446-7PlasmonsIntegrated waveguideCritical couplingTemporal coupled-mode theoryNanoparticle chain |
| spellingShingle | Marius Crouzier Fei Mao Giovanni Magno Vy Yam Carlos Alonso-Ramos Jean-René Coudevylle Etienne Herth Christophe Dupuis Xavier Leroux Thomas Lopez Béatrice Dagens Critical coupling in plasmonic chain for efficient energy trapping Scientific Reports Plasmons Integrated waveguide Critical coupling Temporal coupled-mode theory Nanoparticle chain |
| title | Critical coupling in plasmonic chain for efficient energy trapping |
| title_full | Critical coupling in plasmonic chain for efficient energy trapping |
| title_fullStr | Critical coupling in plasmonic chain for efficient energy trapping |
| title_full_unstemmed | Critical coupling in plasmonic chain for efficient energy trapping |
| title_short | Critical coupling in plasmonic chain for efficient energy trapping |
| title_sort | critical coupling in plasmonic chain for efficient energy trapping |
| topic | Plasmons Integrated waveguide Critical coupling Temporal coupled-mode theory Nanoparticle chain |
| url | https://doi.org/10.1038/s41598-025-05446-7 |
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