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Laser-Inscribed Diamond Waveguide Resonantly Coupled to Diamond Microsphere.
Nurperi Yavuz1, Mustafa Mert Bayer1,2, Hüseyin Ozan Ҫirkinoğlu1
1Department of Physics, Microphotonics Research Laboratory, Koç University, Rumelifeneri Yolu, Sarıyer, 34450 Istanbul, Turkey.
Molecules (Basel, Switzerland)
|June 14, 2020
Summary
Researchers created an all-diamond photonic circuit using a diamond microsphere and laser-written waveguide. This integrated diamond photonics platform enables high-quality factor resonances for advanced optical applications.
Area of Science:
- Photonics
- Materials Science
- Optics
Background:
- Integrated photonics offers miniaturization and enhanced functionality.
- Diamond's unique optical properties make it a promising material for photonic devices.
Purpose of the Study:
- To implement an all-diamond photonic circuit by integrating a diamond microsphere with a femtosecond-laser-written waveguide.
- To explore the potential of this integrated system for advanced optical applications.
Main Methods:
- Fabrication of a near-surface diamond waveguide using the Type II method for stress-induced waveguiding.
- Integration of the diamond waveguide with a diamond microsphere.
- Injection of near-infrared light and characterization of whispering-gallery modes.
Main Results:
- Demonstration of whispering-gallery modes in the coupled diamond microsphere-waveguide system.
- Observed mode spacing of 0.33 nm and high-quality factors (Q) of 10^5.
- Successful waveguiding of transverse electric and transverse magnetic polarized light.
Conclusions:
- The implemented all-diamond photonic circuit demonstrates high-quality factor resonances.
- This platform is suitable for realizing filtering, sensing, and nonlinear optical applications.
- Exploiting nitrogen-vacancy centers in diamond can further enhance device capabilities.
