Terahertz disk resonator on a substrateless dielectric waveguide platform.

Area of Science:

• Integrated photonics
• Terahertz (THz) technology
• Resonant cavity devices

Background:

• Terahertz integrated systems rely on resonant cavities, but existing platforms suffer from high losses.
• Developing low-loss platforms is crucial for enhancing the performance of THz devices.

Purpose of the Study:

• To propose and demonstrate a series of integrated disk resonators on a substrateless silicon waveguide platform.
• To achieve high quality factor (Q-factor) and tunable resonance in THz integrated systems.

Main Methods:

• Fabrication of disk resonators integrated into a low-loss, substrateless silicon waveguide.
• Utilizing an effective medium for controlling resonance and Q-factor.
• Optical power modulation for tuning resonator characteristics.

Main Results:

• Demonstrated Q-factors up to 9146 at 274.4 GHz, attributed to the low-loss platform.
• Observed strong tunability of resonance under moderate optical power.
• Validated the effectiveness of the substrateless silicon waveguide for high-performance THz resonators.

Conclusions:

• The proposed terahertz integrated disk resonators offer superior performance due to the low-loss platform.
• These resonators exhibit significant tunability, making them suitable for dynamic applications.
• The developed technology paves the way for advanced THz sensing and communication systems.