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Tunable Electromagnetically and Optomechanically Induced Transparency in a Spinning Optomechanical System.

Haoliang Hu1, Jinting Li1, Xiaofei Li1

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Reversing the rotation direction of a spinning optomechanical system switches its optical absorption. This quantum-level control enables tunable absorption and gain, useful for chiral photonic communications.

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atomic ensembleelectromagnetically induced transparencyoptomechanically induced transparencyoptomechanicssagnac effect

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Area of Science:

  • Quantum optics
  • Optomechanics
  • Atomic physics

Background:

  • Optomechanical systems couple light and motion.
  • Atomic ensembles influence light propagation.
  • Spinning resonators introduce unique physical effects.

Purpose of the Study:

  • Investigate optical response in an atom-assisted spinning optomechanical system.
  • Demonstrate non-reciprocal optical control via rotation.
  • Explore tunable absorption and gain.

Main Methods:

  • Coupling a spinning optical resonator to a two-level atomic ensemble and a mechanical resonator.
  • Applying a weak pump field to the mechanical resonator.
  • Analyzing the system's optical response under varying rotation directions and phase differences.

Main Results:

  • Reversing rotation direction switches the system between low-absorption (transparency) and high-absorption states.
  • Direction-dependent switching between absorption and gain is achieved by tuning phase differences.
  • Non-reciprocal effects stem from Sagnac-induced frequency shifts.
  • Absorption spectrum is tunable by angular velocity and atomic number.

Conclusions:

  • The spinning optomechanical system exhibits non-reciprocal optical properties.
  • Optical response can be manipulated by angular velocity, phase difference, and atom number.
  • Potential applications in chiral photonic communications.