Strong Cavity-Optomechanical Transduction of Nanopillar Motion
Nanomechanical resonators can serve as ultrasensitive,miniaturized force probes. While vertical structures such as nanopillarsare ideal for this purpose, transducing their motion is challenging. Pillar-based photonic crystals (PhCs) offer a potential solution by integratingoptical transduction withi...
| Autores: | , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:dnet:recercat____::e18a32a18afa0de0dcb8d03566d763f5 |
| Acceso en línea: | https://hdl.handle.net/2445/229522 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanoelectrònica Nanocristalls semiconductors Nanoelectronics Semiconductor nanocrystals |
| Sumario: | Nanomechanical resonators can serve as ultrasensitive,miniaturized force probes. While vertical structures such as nanopillarsare ideal for this purpose, transducing their motion is challenging. Pillar-based photonic crystals (PhCs) offer a potential solution by integratingoptical transduction within the pillars. However, achieving high-qualityPhCs is hindered by inefficient vertical light confinement. Here, wepresent a full-silicon photonic crystal cavity based on nanopillars as aplatform for applications in force sensing and biosensing areas. Its unit cellconsists of a silicon pillar with a larger diameter at its top portion than atthe bottom, which allows vertical light confinement and an energy bandgap in the near-infrared range for transverse-magnetic polarization. Weexperimentally demonstrate optical cavities with Q factors exceeding 1e3,constructed by inserting a defect within a periodic arrangement of thistype of pillars. Each nanopillar naturally behaves as a nanomechanicalcantilever, making the fabricated geometries excellent optomechanical (OM) photonic crystal cavities in which the mechanicalmotion of each nanopillar composing the cavity can be optically transduced. These geometries display enhanced mechanicalproperties, cost-effectiveness, integration possibilities, and scalability. They also present an alternative in front of the widelyused suspended Si beam OM cavities made on silicon-on-insulator substrates. |
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