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Meta-Optics-Empowered Switchable Integrated Mode Converter Based on the Adjoint Method.

Yingli Ha1, Yinghui Guo1,2, Mingbo Pu1,2

  • 1State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China.

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|October 14, 2022
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Summary
This summary is machine-generated.

We developed a novel switchable mode converter for photonic integrated circuits (PICs) using phase change materials. This device enables efficient TE0 mode transmission and TE0-to-TE1 mode conversion, advancing optical communication and quantum systems.

Keywords:
adjoint methodmeta-opticsphotonic integrated circuitsswitchable mode converter

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Area of Science:

  • Photonics
  • Integrated Optics
  • Materials Science

Background:

  • Photonic integrated circuits (PICs) are crucial for optical communications and quantum systems.
  • Miniaturization and multifunctionality of PICs are driven by micro/nano-technology.
  • Optimal design of reconfigurable PIC devices is challenging due to large design spaces.

Purpose of the Study:

  • To propose a new design method for switchable mode converters.
  • To enable high-performance, reconfigurable PIC devices.
  • To explore applications in advanced optical systems.

Main Methods:

  • Utilized mode coupling theory and adjoint calculation.
  • Designed a switchable mode converter using phase change materials (PCMs).
  • Analyzed device performance at a 1.55 μm wavelength.

Main Results:

  • Achieved a compact footprint of 0.9 × 7.5 μm².
  • Demonstrated TE0 mode transmission and TE0-to-TE1 mode conversion.
  • Obtained a mode purity of 78.2% in both operational states.

Conclusions:

  • The proposed design method offers a new approach for programmable photonic integrated devices.
  • The switchable mode converter has broad applications in communication, optical neural networks, and sensing.
  • This work advances the development of intelligent and multifunctional PICs.