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Towards broad-bandwidth polarization-independent nanostrip waveguide ring resonators
M Erdmanis1, L Karvonen, A Säynätjoki
1Aalto University, Department of Micro- and Nanosciences, Tietotie 3, FI-02150 Espoo, Finland. mikhail.erdmanis@aalto.fi
Optics Express
|April 24, 2013
Summary
Researchers developed a new method for broadband, polarization-independent microring resonators using titanium dioxide overlayers. This technique ensures consistent performance across different light polarizations for advanced photonic devices.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
Background:
- Microring resonators are crucial components in integrated photonics.
- Achieving polarization-independent operation over a broad bandwidth remains a challenge.
Purpose of the Study:
- To demonstrate a novel method for broad-bandwidth, polarization-independent microring resonator operation.
- To utilize standard photonic nanostrip waveguides for enhanced performance.
Main Methods:
- Selective atomic layer deposition (ALD) of titanium dioxide (TiO2) overlayers.
- Engineering specific dispersion properties into the waveguide structure.
- Matching the wavelength dependencies of free spectral ranges for orthogonal polarizations.
Main Results:
- Successfully achieved broad-bandwidth operation.
- Demonstrated polarization-independent performance.
- Highly uniform TiO2 overlayers with tailored dispersion properties were formed.
Conclusions:
- The proposed method enables robust and versatile microring resonator operation.
- This technique is compatible with standard photonic fabrication processes.
- Offers a pathway for advanced optical communication and sensing applications.
