Role of Symmetry Breaking in Observing Strong Molecule-Cavity Coupling Using Dielectric Microspheres
| Autor: | Adarsh B. Vasista, Eduardo J. C. Dias, F. Javier García de Abajo, William L Barnes |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Nano Letters, 22 (16) |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | The emergence of dielectric open optical cavities has opened a new research avenue in nanophotonics. In particular, dielectric microspheres support a rich set of cavity modes with varying spectral characteristics, making them an ideal platform to study molecule-cavity interactions. The symmetry of the structure plays a critical role in the outcoupling of these modes and, hence, the perceived molecule-cavity coupling strength. Here, we experimentally and theoretically study molecule-cavity coupling mediated by the Mie scattering modes of a dielectric microsphere placed on a glass substrate and excited with far-field illumination, from which we collect scattering signatures both in the air and glass sides. Glass-side collection reveals clear signatures of strong molecule-cavity coupling (coupling strength 2g = 74 meV), in contrast to the air-side scattering signal. Rigorous electromagnetic modeling allows us to understand molecule-cavity coupling and unravel the role played by the spatial mode profile in the observed coupling strength. Nano Letters, 22 (16) ISSN:1530-6984 ISSN:1530-6992 |
| Databáze: | OpenAIRE |
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