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  3. Nonvolatile Photonic Field-programmable Coupler Array.
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  3. Nonvolatile Photonic Field-programmable Coupler Array.

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Nonvolatile photonic field-programmable coupler array.

Håvard Hem Toftevaag1, Bowei Dong1,2, Nikolaos Farmakidis1

  • 1Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK.

Science Advances
|May 1, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Researchers developed a new programmable photonic network using Sb2Se3, enabling smaller, zero-static power devices for optical interconnects. This breakthrough advances reconfigurable photonic systems.

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Area of Science:

  • Photonics
  • Materials Science
  • Integrated Optics

Background:

  • Programmable photonic networks are crucial for universal unitary functions, impacting areas like microwave photonics, photonic computing, and optical communications.
  • Current technologies suffer from large footprints and continuous power consumption due to low modulation efficiency.

Purpose of the Study:

  • To demonstrate a novel programmable photonic network unit cell.
  • To overcome the limitations of existing photonic systems by reducing footprint and power consumption.

Main Methods:

  • Development of a programmable recirculating mesh unit cell.
  • Utilizing the nonvolatile, low-loss phase-change material Sb2Se3.
  • Device fabrication and characterization for performance evaluation.

Main Results:

  • Achieved an ultrashort active device length (<10 μm), significantly smaller than current technologies.
  • Demonstrated zero static power consumption for maintaining configured states.
  • Exhibited high-extinction switching (>20 dB), broadband operation (>15 nm), and low insertion loss (<2 dB).

Conclusions:

  • The developed Sb2Se3-based unit cell offers a pathway to nonvolatile field-programmable coupler arrays (nv-FPCAs).
  • This technology enables the creation of zero-static power reconfigurable optical interconnects, advancing photonic systems.