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Patterning via Optical Saturable Transitions - Fabrication and Characterization
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A programmable platform for photonic topological insulators.

Stuart Love1,2,3, Mohamad Hossein Idjadi3, Farshid Ashtiani3

  • 1Department of Physics & Astronomy, University of California, Irvine, CA 92697, USA.

Nanophotonics (Berlin, Germany)
|February 19, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a programmable silicon photonic system for topological photonics, enabling robust edge state transport. This flexible platform demonstrates tunable topological insulator lattices and defect tolerance for advanced photonic applications.

Keywords:
programmable photonicsring resonatorsilicon photonicstopological photonicstunable devices

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Area of Science:

  • Topological Photonics
  • Quantum Information Science
  • Integrated Photonics

Background:

  • Topological photonics offers protected edge states robust to defects, crucial for quantum information science and integrated photonics.
  • Conventional topological structures lack flexibility and post-fabrication tunability for diverse topological models.

Purpose of the Study:

  • To present a method for implementing magnetic-like Hamiltonians and topologically protected edge modes on a programmable silicon photonic platform.
  • To demonstrate the reconfigurability and robustness of topological photonic systems.

Main Methods:

  • Utilized a general-purpose programmable silicon photonic mesh of interferometers.
  • Reconfigured the lattice into a 2D mesh of ring resonators with tuned couplings to implement magnetic-like Hamiltonians.
  • Introduced defects to test the robustness of edge states.

Main Results:

  • Successfully implemented topologically protected edge modes on the reconfigurable silicon photonic platform.
  • Demonstrated robust edge state transport despite manufacturing defects and introduced lattice/bulk defects.
  • Showcased reconfigurability by creating topological insulator lattices of varying sizes and shapes.

Conclusions:

  • The proposed method enables flexible and tunable implementation of topological photonics on general-purpose programmable platforms.
  • The system exhibits inherent robustness to defects, paving the way for practical photonic topological insulators.