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Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy

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Spatial-mode-coupling-based dispersion engineering for integrated optical waveguide.

Yu Li, Jiachen Li, Yuandong Huo

|February 7, 2018

Summary

This summary is machine-generated.

This study introduces a novel spatial mode coupling technique for dispersion engineering in optical waveguides. It allows for precise control of anomalous dispersion by adjusting waveguide width, overcoming fabrication limitations.

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Area of Science:

Photonics
Materials Science
Optical Engineering

Background:

Dispersion significantly impacts nonlinear optical processes in waveguides.
Conventional dispersion engineering relies on altering both waveguide height and width, which is limited by fabrication constraints.

Purpose of the Study:

To develop a dispersion engineering technique that overcomes fabrication limitations.
To achieve anomalous dispersion by solely modifying waveguide width through spatial mode coupling.

Main Methods:

Implemented a dispersion engineering technique based on spatial mode coupling.
Engineered dispersion by tailoring the width of silicon nitride/silicon dioxide (Si₃N₄/SiO₂) waveguides without altering their height.

Main Results:

Achieved anomalous dispersion over a 70 nm wavelength range numerically.
Experimentally demonstrated a change in micro-ring resonator dispersion from -750 ± 30 ps/nm/km to 1300 ± 200 ps/nm/km over a 25 nm range.
Maintained a high quality factor (Q) of 0.8 million.

Conclusions:

The spatial mode coupling technique effectively controls dispersion by altering waveguide width, bypassing fabrication restrictions.
This method enhances design freedom for optical waveguides, expanding applications in on-chip nonlinear optics.