研究目的
Investigating the generation and tunability of high-quality Fano resonance in coupled terahertz whispering-gallery-mode resonators for potential applications in terahertz sensing, filtering, and modulation.
研究成果
The study successfully demonstrates a tunable Fano resonance with a high Q factor of 2095 in coupled terahertz WGMRs. The resonant frequency and intensity of the Fano resonance can be actively controlled, offering promising applications in terahertz devices. The scheme provides a significant improvement in Q factors and introduces flexible tunability compared to previous studies.
研究不足
The study is limited by the material losses of the resonators and the precision of the thermo-optic tuning method. The maximum frequency detuning achievable is around ±1.9 GHz, and the temperature control is constrained by the heat conduction efficiency.
1：Experimental Design and Method Selection:
The study employs a coupled-WGMR system consisting of a straight waveguide and two WGMRs to generate and tune Fano resonance. The coupled-mode theory is utilized to model and analyze the system.
2：Sample Selection and Data Sources:
A quartz ring with relatively low Q and a silicon ring with relatively high Q are used as WGMR1 and WGMR2, respectively. The materials are selected based on their loss properties to achieve desired Q factors.
3：List of Experimental Equipment and Materials:
The setup includes a silica fiber as the straight waveguide, resistance wire for thermo-optic tuning, and translation stages for adjusting coupling strength.
4：Experimental Procedures and Operational Workflow:
The resonant frequency of the Fano resonance is manipulated by applying voltages to the resistance wire, and the resonance intensity is adjusted by changing the coupling strength between the two WGMRs.
5：Data Analysis Methods:
The transmission and phase spectra are analyzed using the coupled-mode theory to extract system parameters.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
