Nanorod photonic crystal ring resonators.

Area of Science:

• Photonics
• Nanotechnology
• Materials Science

Background:

• Photonic ring resonators are crucial for integrated optics.
• Achieving high quality factors (Q-factor) in compact resonators is a key challenge.
• Dielectric nanorod arrays offer a novel approach to resonator design.

Purpose of the Study:

• To investigate the properties of a photonic ring resonator composed of circular dielectric nanorods.
• To determine the potential for high Q-factor operation in a small footprint.
• To provide design guidelines and analyze practical implementations for Gallium Nitride (GaN) based resonators.

Main Methods:

• Full 3D finite difference time domain (FDTD) simulations were employed for validation.
• Analysis of transverse-magnetic (TM)-like modes was performed.
• Parametric studies were conducted varying resonator and material parameters.

Main Results:

• The proposed resonator design demonstrates the potential for high Q-factor values.
• Specific TM-like modes exhibit desirable properties for applications.
• Performance was analyzed for various resonator parameters using GaN material properties.

Conclusions:

• The study validates the effectiveness of periodic dielectric nanorod arrays for creating high-Q photonic resonators.
• Design guidelines are established for optimizing resonator performance.
• Two practical implementations are proposed and analyzed, paving the way for fabrication.