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Hexagonal Boron Nitride Cavity Optomechanics.

Prasoon K Shandilya1, Johannes E Fröch2, Matthew Mitchell1

  • 1Institute for Quantum Science and Technology , University of Calgary , Calgary , Alberta T2N 1N4 , Canada.

Nano Letters
|January 25, 2019
PubMed
Summary
This summary is machine-generated.

Researchers created the first cavity optomechanical system using hexagonal boron nitride (hBN) nanobeams. This breakthrough enables new possibilities for advanced nanophotonics and nanomechanics applications.

Keywords:
OptomechanicshBNmicrocavitynanofabricationnanophotonics

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Area of Science:

  • Materials Science
  • Quantum Optics
  • Nanotechnology

Background:

  • Hexagonal boron nitride (hBN) is a 2D layered material with significant potential in nanophotonics and nanomechanics.
  • Optomechanical systems combine optical and mechanical elements to study light-matter interactions at the nanoscale.

Purpose of the Study:

  • To demonstrate the first cavity optomechanical system incorporating hexagonal boron nitride (hBN).
  • To investigate the optomechanical properties of hBN nanomechanical resonators.

Main Methods:

  • Fabrication of hBN nanomechanical resonators using electron beam induced etching.
  • Integration of hBN resonators into the optical near-field of silicon microdisk cavities.
  • Measurement of nanobeam motion sensitivity and mechanical resonances using optical detection.

Main Results:

  • Demonstrated a maximum sensitivity of 0.16 pm/sqrt(Hz) to hBN nanobeam motion.
  • Observed thermally driven mechanical resonances between 1 and 23 MHz.
  • Achieved a maximum mechanical quality factor of 1100 for a 23 MHz mode at room temperature in vacuum.
  • Studied the effect of air damping on device performance through pressure-dependent measurements.

Conclusions:

  • This work represents a significant advancement in developing integrated optomechanical circuits utilizing hBN.
  • The demonstrated hBN-based optomechanical system opens avenues for novel applications in quantum technologies and sensing.