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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Wafer-scale δ waveguides for integrated two-dimensional photonics.

Myungjae Lee^1,2, Hanyu Hong³, Jaehyung Yu³

¹James Franck Institute, University of Chicago, Chicago, IL 60637, USA.

Science (New York, N.Y.)

|August 10, 2023

Summary

This summary is machine-generated.

Researchers developed ultra-thin molybdenum disulfide (MoS2) waveguides for efficient light manipulation. These δ-waveguides enable low-loss light guiding and control for future photonic circuits.

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Area of Science:

Materials Science
Nanotechnology
Photonics

Background:

Controlling light with van der Waals materials for on-chip photonic circuits is challenging.
Efficient generation and control of photonic modes are crucial for integrated photonics.

Purpose of the Study:

To demonstrate efficient, large-scale generation and control of photonic modes using novel waveguides.
To explore the potential of wafer-scale molybdenum disulfide (MoS2) monolayers for photonic applications.

Main Methods:

Fabrication of three-atom-thick δ-waveguides using wafer-scale molybdenum disulfide (MoS2) monolayers.
Characterization of light guiding properties in visible and near-infrared spectrum.
Integration of microfabricated optical components (dielectric, metal, patterned MoS2) with δ-waveguides.

Main Results:

Demonstrated millimeter-scale light guiding with low loss and efficient in-coupling.
Observed a light-trapping mechanism due to extreme thinness, analogous to a δ-potential well.
Showcased key functionalities: refraction, focusing, grating, interconnection, and intensity modulation.

Conclusions:

Ultra-thin MoS2 δ-waveguides offer a promising platform for two-dimensional photonics.
The demonstrated functionalities are essential for building complex on-chip photonic circuitry.
This work paves the way for advanced integrated photonic devices based on van der Waals materials.