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Related Experiment Video

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Flexible dispersion engineering using polymer patterning in nanophotonic waveguides.

Pei-Hsun Wang1, Shang-Pu Wang2, Nien-Lin Hou2

  • 1Department of Optics and Photonics, National Central University, Taoyuan City, 320317, Taiwan. phwang@dop.ncu.edu.tw.

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|August 14, 2023
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Summary
This summary is machine-generated.

Engineered waveguide dispersion using patterned polymer cladding on silicon nitride resonators. This method achieves tunable normal and anomalous dispersion without affecting waveguide loss or quality factor, enabling versatile photonic chip designs.

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Area of Science:

  • Photonics and Materials Science
  • Integrated Optics

Background:

  • Waveguide dispersion is a critical parameter in integrated photonic circuits, influencing signal propagation and device performance.
  • Existing methods for dispersion engineering often involve complex fabrication processes or material limitations.

Purpose of the Study:

  • To demonstrate a novel method for engineering waveguide dispersion in silicon nitride waveguide resonators.
  • To achieve tunable normal and anomalous dispersion using lithographically patterned polymer cladding.

Main Methods:

  • Lithographic patterning of polymer cladding on silicon nitride waveguide resonators.
  • Fabrication of integrated photonic chips with tailored waveguide dispersion characteristics.

Main Results:

  • Achieved both normal and anomalous dispersion, ranging from -462 to 409 ps/nm/km, for identical waveguide dimensions.
  • Demonstrated that the patterning process does not impact waveguide loss or resonator quality factor.
  • Showcased the potential for zero-dispersive waveguide resonators by adjusting cladding coverage ratio.

Conclusions:

  • The developed technique offers a flexible and simple approach to engineer waveguide dispersion on a universal photonic platform.
  • This method provides precise control over dispersion, crucial for advanced integrated photonic applications.
  • The ability to tune dispersion and achieve low or zero values opens new avenues for photonic device design.