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Optomechanical Anti-Lasing with Infinite Group Delay at a Phase Singularity.

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This summary is machine-generated.

Researchers experimentally demonstrated optomechanically induced singularities in a superconducting cavity. This phenomenon enables abrupt changes in light propagation, potentially leading to extremely long group delays.

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Area of Science:

  • Quantum Optics
  • Optomechanics
  • Condensed Matter Physics

Background:

  • Singularities represent abrupt changes and extraordinary behaviors, attracting broad scientific interest.
  • Optomechanical systems, combining optical cavities and mechanical resonators, offer a platform for studying light-matter interactions.

Purpose of the Study:

  • To experimentally investigate optomechanically induced singularities in a compound system.
  • To explore the associated phenomena of coherent perfect absorption, anti-lasing, and phase transitions.

Main Methods:

  • Utilizing a compound system comprising a 3D aluminum superconducting cavity and a metalized silicon nitride membrane resonator.
  • Inducing singularities through critical optomechanical coupling strength.
  • Measuring the phase transition and group velocity changes around the cavity resonance.

Main Results:

  • Simultaneous observation of mechanically induced coherent perfect absorption and anti-lasing.
  • An abrupt π-phase transition in the cavity resonance phase.
  • An infinite discontinuity in the phase slope, defining a singularity with dramatically altered group velocity.
  • Demonstration of an abrupt transition from group advance to delay for a propagating Gaussian waveform.

Conclusions:

  • The study experimentally realized optomechanically induced singularities.
  • The observed singularity dramatically alters group velocity, enabling transitions between group advance and delay.
  • This research may expand possibilities for achieving extremely long group delays using singularities.