Science Advances

Supplementary Materials

This PDF file includes:

  • Theory of linear optical torque density in silicon waveguide
  • Photonic crystal nanocavity design
  • Waveguide-nanobeam junction design
  • TE-to-TM mode converter design
  • Simulation of mechanical modes
  • Effective torsional simple harmonic oscillator model
  • Calibration of optomechanical measurement transduction factors
  • Effective torque
  • Resonance response of the effective torsional simple harmonic oscillator
  • Comparison of the excitation of the torsional and flapping modes
  • fig. S1. Simulated torque density distributions inside a silicon waveguide (bulk contribution) suspended in air.
  • fig. S2. Simulated surface torque density distribution along waveguide surfaces.
  • fig. S3. Simulated coefficient η for waveguides with various widths but with a fixed height of 340 nm.
  • fig. S4. Simulated mode profile (TE field) of the photonic crystal nanocavity.
  • fig. S5. Finite-difference time-domain simulation results showing the transmission of TE and TM mode through the junction structure.
  • fig. S6. Scanning electron micrograph of the mode convertor.
  • fig. S7. Simulated mechanical mode profiles of the suspended silicon waveguide and nanobeam.
  • fig. S8. Simulated normalized mode profiles of the suspended silicon waveguide and nanobeam.
  • fig. S9. Comparison of the excitation of the out-of-plane torsional and flapping modes under identical experimental conditions.
  • table S1. Simulated resonance frequencies of the mechanical modes.
  • table S2. Simulated parameters of the effective torsional simple harmonic oscillator.
  • References (4143)

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