Interaction between light and highly confined hypersound in a silicon photonic nanowire
By R. Van Laer, Bart Kuyken, D. van Thourhout, R. Baets. Nature Photonics, 2014
346 citations recorded by the source corpus.
In the past decade there has been a surge in research at the boundary between photonics and phononics. Most efforts have centred on coupling light to motion in a high-quality optical cavity, typically geared towards manipulating the quantum state of a mechanical oscillator. It was recently predicted that the strength of the light–sound interaction would increase drastically in nanoscale silicon photonic wires. Here we demonstrate, for the first time, such a giant overlap between near-infrared light and gigahertz sound co-localized in a small-core silicon wire. The wire is supported by a tiny pillar to block the path for external phonon leakage, trapping 10 GHz phonons in an area of less than 0.1 μm2. Because our geometry can also be studied in microcavities, it paves the way for complete fusion between the fields of cavity optomechanics and Brillouin scattering. The results bode well for the realization of optically driven lasers/sasers, isolators and comb generators on a densely integrated silicon chip. The authors experimentally and theoretically demonstrate stimulated Brillouin scattering in a silicon nanowire supported by a pillar, which results from the tight confinement of both photons and phonons.
Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/90ed2cb3fdd7457deff622c8123bc805c1b9680f
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In Atomic and Molecular Physics, and Optics
In Electrical and Electronic Engineering
Citations in the corpus
- Compact Brillouin devices through hybrid integration on silicon (2017, neutral): “This is in stark contrast to pure silicon structures, with close to 4 dB of pump attenuation expected for a simulated silicon membrane and almost 6 dB for a nanowire geometry, effectively saturating the input pump power and preventing any further gain [25].”
- Low-power, chip-based stimulated Brillouin scattering microwave photonic filter with ultrahigh selectivity (2014, background): “For various reasons, such as photosensitivity [48], heating [39], or intensity-dependent losses [27], many on-chip devices are not suited to handle high optical power.”
- Stimulated Brillouin Scattering in integrated photonic waveguides: forces, scattering mechanisms and coupled mode analysis (2014, background): “SBS is closely related to the field of optomechanics [17], which is a similarly dynamic area of research [18].”