Gigahertz Nano-Optomechanical Resonances in a Dielectric SiC-Membrane Metasurface Array
| Autor: | H. Johnson Singh, Theo Chen-Sverre, Idris A. Ajia, Nicholas J. Dinsdale, Jun-Yu Ou, Tongjun Liu, Otto L. Muskens, Nikolay I. Zheludev |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Nanophotonics Physics::Optics Bioengineering 02 engineering and technology General Chemistry Dielectric 021001 nanoscience & nanotechnology Condensed Matter Physics Nanometrology Modulation Optoelectronics General Materials Science Photonics 0210 nano-technology business Ultrashort pulse Optomechanics Excitation |
| Zdroj: | Nano Letters. 21:4563-4569 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | Optically and vibrationally resonant nanophotonic devices are of particular importance for their ability to enhance optomechanical interactions, with applications in nanometrology, sensing, nano-optical control of light, and optomechanics. Here, the optically resonant excitation and detection of gigahertz vibrational modes are demonstrated in a nanoscale metasurface array fabricated on a suspended SiC membrane. With the design of the main optical and vibrational modes to be those of the individual metamolecules, resonant excitation and detection are achieved by making use of direct mechanisms for optomechanical coupling. Ultrafast optical pump-probe studies reveal a multimodal gigahertz vibrational response corresponding to the mechanical modes of the suspended nanoresonators. Wavelength and polarization dependent studies reveal that the excitation and detection of vibrations takes place through the metasurface optical modes. The dielectric metasurface pushes the modulation speed of optomechanical structures closer to their theoretical limits and presents a potential for compact and easily fabricable optical components for photonic applications. |
| Databáze: | OpenAIRE |
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