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Fully symmetric controllable integrated three-resonator photonic molecule

Jiawei Wang,Kaikai Liu,Qiancheng Zhao,Andrei Isichenko,R. Rudy,D. Blumenthal

Published 2021 in Unknown venue

ABSTRACT

Photonic molecules can be used to realize complex optical energy states and modes, analogous to those found in molecules, with properties useful for applications like spectral engineering, analog computation, many body physics simulations, and quantum optics. It is desirable to implement photonic molecules using high quality factor (Q) photonic integrated ring resonators due to their narrow atom-like spectral resonance, tunability, and the ability to scale the number of resonators on a photonic circuit. However, in order to take full advantage of molecule spectral complexity and tuning degree of freedom, resonator structures should have full symmetry in terms of inter-resonator coupling and resonator-waveguide coupling as well as independent resonance tuning, and low power dissipation operation, in a scalable integration platform. To date, photonic molecule symmetry has been limited to dualand triple-cavity geometries coupled to singleor dual-busses, and resonance tuning limited to dual resonator molecules. In this paper, we demonstrate a three-resonator photonic molecule, consisting of symmetrically coupled 8.11 million intrinsic Q silicon nitride rings, where each ring is coupled to the other two rings as well as to its own independent bus. The resonance of each ring, and that of the collective molecule, is controlled using low power dissipation, monolithically integrated thin-film lead zirconate titanate (PZT) actuators that are integrated with the ultralow loss silicon nitride resonators. This performance is achieved without undercut waveguides, yielding the highest Q to date for a PZT controlled resonator. This advance leads to full control of complex photonic molecule resonance spectra and splitting in a wafer-scale integration platform. The resulting six tunable supermodes can be fully controlled, including degeneracy, location and splitting as well as designed by a model that can accurately predict the energy modes and transmission spectrum and tunable resonance splitting. This symmetrically coupled three-resonator molecule opens the door to applications such as optical circulators, dispersion engineering, nonlinear frequency synthesis, analog computation and quantum photonic circuits and physics simulations that involve scalable number of molecules on chip.

PUBLICATION RECORD

  • Publication year

    2021

  • Venue

    Unknown venue

  • Publication date

    2021-05-22

  • Fields of study

    Physics, Engineering

  • Identifiers
    arXiv 2105.10815
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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