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Elastic Gallium Phosphide Nanowire Optical Waveguides-Versatile Subwavelength Platform for Integrated Photonics.
Alexey Kuznetsov1,2,3, Eduard Moiseev4, Artem N Abramov5
1Faculty of Physics, St. Petersburg State University, Universitetskaya Emb. 13B, St. Petersburg, 199034, Russia.
Small (Weinheim an Der Bergstrasse, Germany)
|May 13, 2023
Summary
Self-assembled gallium phosphide (GaP) nanowires offer ideal properties for nanoscale waveguides. Their geometry influences waveguiding, enabling low-loss, subwavelength structures for integrated optical circuits.
Area of Science:
- Nanophotonics
- Materials Science
- Integrated Optics
Background:
- Integrated optical circuits require novel materials for nanoscale waveguides.
- Key criteria include high optical density, small cross-section, and structural perfection.
Purpose of the Study:
- Investigate the waveguiding properties of self-assembled gallium phosphide (GaP) epitaxial nanowires.
- Analyze the impact of nanowire geometry on optical performance for integrated photonic applications.
Main Methods:
- Experimental and numerical studies of GaP nanowire geometry and waveguiding.
- Analysis of cut-off wavelength dependence on nanowire diameter.
- Supercontinuum laser probing to reveal filtering properties.
Main Results:
- GaP nanowires meet criteria for high-performance nanoscale waveguides.
- Demonstrated low-loss, subwavelength waveguides for visible and near-infrared ranges.
- Showcased filtering properties and elasticity for curved waveguide fabrication.
Conclusions:
- GaP nanowires are suitable for advanced photonic logic circuits and interferometers.
- Nanowire geometry control enables tailored waveguiding properties.
- Developed an optical X-coupler for spectral signal separation using GaP nanowires.
