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Reconfigurable optomechanical circulator and directional amplifier.

Zhen Shen1,2, Yan-Lei Zhang1,2, Yuan Chen1,2

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|May 6, 2018
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Researchers developed a reconfigurable non-reciprocal device using optomechanics. This device can function as a circulator or directional amplifier, crucial for advanced photonic and quantum circuits.

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Area of Science:

  • Photonics
  • Quantum Information Processing
  • Optomechanics

Background:

  • Non-reciprocal devices are essential for signal routing in photonic and microwave circuits.
  • Breaking Lorentz reciprocity without magnetic materials is key for advanced device functionalities.
  • Optomechanical coupling in travelling-wave resonators offers a pathway to non-reciprocal devices.

Purpose of the Study:

  • To experimentally demonstrate a reconfigurable non-reciprocal device.
  • To achieve alternative functions like circulation or directional amplification within a single device.
  • To explore the integration of reconfigurability, non-reciprocity, and active properties.

Main Methods:

  • Utilizing radiation-pressure-induced coupling between light and mechanical motion.
  • Employing optomechanically induced coherent photon-phonon conversion or gain.
  • Experimental demonstration in travelling-wave resonators.

Main Results:

  • Successful demonstration of a reconfigurable non-reciprocal device.
  • Achieved dual functionality as a circulator and a directional amplifier.
  • Exhibited considerable flexibility and combined reconfigurability with non-reciprocity and active properties.

Conclusions:

  • The demonstrated device offers significant flexibility for photonic circuits.
  • This work opens opportunities for integrated devices with reconfigurable non-reciprocal and active functionalities.
  • The principles can be extended to microwave and acoustic circuits.