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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Non-volatile electrically programmable integrated photonics with a 5-bit operation.

Rui Chen1, Zhuoran Fang2, Christopher Perez3

  • 1Department of Electrical and Computer Engineering, University of Washington, Seattle, WA, 98195, USA. charey@uw.edu.

Nature Communications
|June 12, 2023
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Summary
This summary is machine-generated.

This study introduces a novel antimony sulfide (Sb2S3) phase-change material for scalable photonic integrated circuits. The new material enables low-loss, high-performance optical switching with multilevel operation for advanced information processing.

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Area of Science:

  • Photonics
  • Materials Science
  • Optical Computing

Background:

  • Scalable photonic integrated circuits (PICs) are crucial for advancing classical and quantum information processing.
  • Traditional programming methods for PICs face limitations in device footprint and energy consumption.
  • Phase-change materials (PCMs) offer potential but often exhibit high loss and limited functionality.

Purpose of the Study:

  • To develop a novel PCM-based platform for scalable and efficient PICs.
  • To overcome the limitations of existing PCMs in terms of loss, cyclability, and multilevel operation.
  • To demonstrate a new programming approach for enhanced PIC performance.

Main Methods:

  • Integration of wide-bandgap antimony sulfide (Sb2S3) PCM with a silicon photonic platform.
  • Utilizing on-chip silicon PIN diode heaters for programming the Sb2S3 material.
  • Employing dynamic pulse control to achieve multilevel switching states.

Main Results:

  • Achieved low insertion loss (<1.0 dB) and high extinction ratio (>10 dB) with Sb2S3-clad devices.
  • Demonstrated high cyclability (>1600 switching events) and non-volatile operation.
  • Successfully implemented 5-bit (32 levels) operation with precise control over intermediate states (0.50 ± 0.16 dB/step).

Conclusions:

  • The Sb2S3-clad silicon photonic platform offers a promising solution for scalable PICs.
  • The demonstrated multilevel operation and low loss pave the way for advanced optical processing.
  • This technology can be applied to mitigate phase errors in devices like Mach-Zehnder interferometers.