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Rewritable photonic integrated circuits using dielectric-assisted phase-change material waveguides
Optics Letters
|May 1, 2023
Summary
Researchers developed rewritable photonic integrated circuits (PICs) using phase-change materials (PCMs). This innovation allows for laser-based writing and thermal erasing, enabling rapid prototyping and design validation for optical technologies.
Area of Science:
- Materials Science
- Optical Engineering
- Quantum Information Science
Background:
- Photonic integrated circuits (PICs) are crucial for optical information science but are typically fabricated using irreversible subtractive processes.
- Current PIC fabrication limits post-fabrication functional modification.
Purpose of the Study:
- To introduce a novel approach for creating rewritable PICs using wide-bandgap non-volatile phase-change materials (PCMs).
- To demonstrate a fabrication-free method for altering PIC functionality, enabling rapid prototyping and design iteration.
Main Methods:
- Designed a dielectric-assisted waveguide utilizing Sb2S3 and Sb2Se3 PCMs.
- Employed nanosecond pulsed laser writing for circuit inscription and thermal annealing for erasure.
- Analyzed spatiotemporal laser pulse shaping for precise circuit writing.
Main Results:
- Achieved low-loss optical waveguides with negligible optical loss using PCMs.
- Demonstrated the feasibility of writing and erasing PICs without material removal.
- Validated the effectiveness of laser pulse shaping for PIC fabrication.
Conclusions:
- The proposed PCM-based platform enables rewritable PICs, offering a paradigm shift from traditional fabrication.
- This technology facilitates low-cost manufacturing, rapid prototyping, design validation, and advancements in photonic education.
- The development paves the way for dynamic and reconfigurable optical circuits.
