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Related Concept Videos

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Versatile photonic molecule switch in multimode microresonators.

Zihan Tao1, Bitao Shen1, Wencan Li1

  • 1State Key Laboratory of Advanced Optical Communications System and Networks, School of Electronics, Peking University, Beijing, 100871, China.

Light, Science & Applications
|February 19, 2024
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Summary
This summary is machine-generated.

We demonstrate a novel on-chip photonic molecule using a multimode microring, offering dynamic control over optical modes. This breakthrough enables flexible photonic molecule functionality for advanced applications like 6G wireless communication.

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Area of Science:

  • Photonics and Quantum Optics
  • Integrated Photonics
  • Artificial Photonic Molecules

Background:

  • Artificial photonic molecules mimic atomic physics using coupled microresonators.
  • Existing systems lack reconfigurability, requiring delicate external stimuli or mechanical adjustments.
  • These limitations restrict the potential applications of photonic molecules.

Purpose of the Study:

  • To propose a versatile on-chip photonic molecule in a multimode microring.
  • To develop a flexible methodology for dynamically controlling spatial modes and their interactions.
  • To enable switchable functionality for broader applications.

Main Methods:

  • Utilizing a multimode microring for on-chip photonic molecule construction.
  • Implementing a flexible regulation methodology to control spatial mode existence and interaction strength.
  • Demonstrating dynamic transitions between single-mode and multi-mode states.

Main Results:

  • Achieved "switched-off/on" functionality for the photonic molecule.
  • Exhibited flexible, multidimensional control of mode splitting (coupling strength and phase difference) in the "switched-on" state, analogous to Stark effects.
  • Demonstrated a low-loss single-mode transition (Q_i ~ 10 million) in the "switched-off" state with an ultra-compact bend size (FSR ~ 115 GHz).
  • Broke the conventional Free Spectral Range (FSR)-Quality (Q) factor trade-off.

Conclusions:

  • Developed a flexible and portable integrated photonic molecule system.
  • Enabled ultra-wideband and high-resolution millimeter-wave photonic operations.
  • Extended the scope of photonic molecules from fundamental physics to practical applications including nonlinear optical signal processing and 6G wireless communication.