Engineering nanoscale hypersonic phonon transport
arXiv:2202.02166 · doi:10.1038/s41565-022-01178-1
Abstract
Controlling the vibrations in solids is crucial to tailor their mechanical properties and their interaction with light. Thermal vibrations represent a source of noise and dephasing for many physical processes at the quantum level. One strategy to avoid these vibrations is to structure a solid such that it possesses a phononic stop band, i.e., a frequency range over which there are no available mechanical modes. Here, we demonstrate the complete absence of mechanical vibrations at room temperature over a broad spectral window, with a 5.3 GHz wide band gap centered at 8.4 GHz in a patterned silicon nanostructure membrane measured using Brillouin light scattering spectroscopy. By constructing a line-defect waveguide, we directly measure GHz localized modes at room temperature. Our experimental results of thermally excited guided mechanical modes at GHz frequencies provides an eficient platform for photon-phonon integration with applications in optomechanics and signal processing transduction.
References in corpus (19)
- Laser cooling of a nanomechanical oscillator into its quantum ground state
- Sideband Cooling Micromechanical Motion to the Quantum Ground State
- Optomechanical Crystals
- A Mechanical Mass Sensor with Yoctogram Resolution
- A microchip optomechanical accelerometer
- A hybrid on-chip opto-nanomechanical transducer for ultra-sensitive force measurements
- Interaction between light and highly confined hypersound in a silicon photonic nanowire
- Phononic bandgap nano-acoustic cavity with ultralong phonon lifetime
- Design of Optomechanical Cavities and Waveguides on a Simultaneous Bandgap Phononic-Photonic Crystal Slab
- A 1D Optomechanical crystal with a complete phononic band gap
- Control of coherent information via on chip photonic-phononic emitter-receivers
- Two-Dimensional Optomechanical Crystal Cavity with High Quantum Cooperativity
- Brillouin Scattering Self-Cancellation
- Phonons in Slow Motion: Dispersion Relations in Ultra-Thin Si Membranes
- A single-mode phononic wire
- Elastic Characterization of Transparent and Opaque Films, Multilayers and Acoustic Resonators by Surface Brillouin Scattering: A Review
- Deterministic Single-Phonon Source Triggered by a Single Photon
- Engineering long-lived vibrational states for an organic molecule
- All-optical radiofrequency modulation of Anderson-localized modes
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- Optomechanical generation of coherent GHz vibrations in a phononic waveguide
- Multimode optomechanics with a two-dimensional optomechanical crystal
- High-resolution acoustic field mapping of GHz phononic crystals with atomic force microscopy
- Silicon anisotropy in a bi-dimensional optomechanical cavity
- Phonon dispersion of nanoscale honeycomb phononic crystal: gigahertz and terahertz spectroscopy comparison
- A perspective on inelastic light scattering spectroscopy for probing transport of collective acoustic excitations