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PT-symmetric phonon laser.

Hui Jing1, S K Özdemir2, Xin-You Lü3

  • 1CEMS, RIKEN, Saitama, 351-0198, Japan and Department of Physics, Henan Normal University, Xinxiang 453007, People's Republic of China.

Physical Review Letters
|August 16, 2014
PubMed
Summary
This summary is machine-generated.

We introduce a PT-symmetric phonon laser using coupled microcavities with balanced gain and loss. This design significantly enhances optical pressure and mechanical gain for efficient phonon lasing.

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Area of Science:

  • Quantum physics
  • Optomechanics

Background:

  • Coupled microcavities offer new possibilities for controlling light and sound.
  • PT-symmetry in open quantum systems allows for unique phenomena like balanced gain and loss.

Purpose of the Study:

  • To introduce and investigate a PT-symmetric phonon laser.
  • To explore the manipulation of optomechanical systems using PT-symmetric concepts.

Main Methods:

  • Utilizing coupled microcavities with gain in one cavity to balance passive loss in the other.
  • Analyzing the nonlinear relationship between intracavity-photon intensity and input power near gain-loss balance.

Main Results:

  • A strong nonlinear relation between intracavity-photon intensity and input power was observed.
  • Giant enhancement of optical pressure and mechanical gain was achieved.
  • Highly efficient phonon-lasing action was demonstrated.

Conclusions:

  • PT-symmetric concepts offer a promising approach for manipulating optomechanical systems.
  • The developed PT-symmetric phonon laser shows potential for enhanced mechanical cooling and phonon-laser amplifiers.