Dynamical range and stability enhancement in electrically fused microknot optical resonators

Area of Science:

• Optoelectronics
• Nanophotonics
• Materials Science

Background:

• Microknot resonators (MKRs) are crucial optical devices.
• Existing fabrication methods present limitations in performance and stability.
• Need for robust and high-performance MKRs for advanced applications.

Purpose of the Study:

• To investigate the impact of electrical fusion on MKR performance.
• To enhance the dynamical range and long-term stability of MKRs.
• To explore the potential of electrically fused MKRs in next-generation devices.

Main Methods:

• Locally fusing microknot resonators using a two-probe electrical technique.
• Operating and evaluating fused MKRs both in situ and as transferred devices.
• Characterizing optical performance, including losses and dynamical range, over time.

Main Results:

• Electrically fused MKRs demonstrate significantly improved optical performance.
• A consistent threefold enhancement in dynamical range was observed.
• Enhanced mechanical stability and low-loss operation were confirmed.
• Stable performance was maintained over time for electrically fused devices.

Conclusions:

• Electrical fusion is a simple and robust technique for fabricating high-performance MKRs.
• Electrically fused MKRs offer enhanced dynamical range and stability.
• These devices are suitable for next-generation optical sensors, actuators, and optomechanical systems.