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Phonon lasing in an electromechanical resonator.

I Mahboob1, K Nishiguchi1, A Fujiwara1

  • 1NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi, Kanagawa 243-0198, Japan.

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Researchers developed an electromechanical resonator with discrete phonon modes. Incoherent input into higher modes resulted in coherent phonon lasing in a lower mode, similar to Brillouin lasing.

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Area of Science:

  • Physics
  • Quantum Mechanics
  • Mechanical Engineering

Background:

  • Electromechanical resonators exhibit discrete mechanical vibrations known as phonon modes.
  • A three-mode system in an electromechanical atom allows resonant interactions between phonon modes.

Purpose of the Study:

  • To develop an electromechanical resonator with an atomlike spectrum of phonon modes.
  • To investigate phonon lasing in a three-mode electromechanical system.

Main Methods:

  • Fabrication of an electromechanical resonator with discrete phonon modes.
  • Applying incoherent input to higher phonon modes.
  • Measuring coherent emission from a lower phonon mode.

Main Results:

  • Demonstrated a purely mechanical three-mode system in an electromechanical atom.
  • Observed coherent phonon emission from the lower mode.
  • The process exhibited characteristics of phonon lasing, analogous to Brillouin lasing.

Conclusions:

  • The developed electromechanical resonator facilitates the study of phonon lasing.
  • Incoherent input can drive coherent phonon emission in resonant systems.
  • This work provides insights into quantum phenomena in mechanical systems.