研究目的
Investigating the suppression of radiation loss in high kinetic inductance superconducting co-planar waveguides at (sub-) mm wavelengths.
研究成果
The study demonstrates that radiation loss in superconducting CPWs can be reduced by decreasing the linewidth and increasing the kinetic inductance. The lowest loss is observed for a CPW with a total width of 6 lm, corresponding to a Q-factor of (cid:2)15 000. The results are in quantitative agreement with simulations of the radiation loss using Sonnet.
研究不足
The analytical solution reported by Frankel et al. is not valid in the regime of high-kinetic inductance superconductors, underestimating the CPW loss when eeff (cid:2) er. Additionally, the dynamic range of the experimental system limits the direct measurement of Qc.
1：Experimental Design and Method Selection:
The experiment involves designing and fabricating superconducting on-chip CPW Fabry–P(cid:2)erot resonators with high kinetic inductance NbTiN and measuring their losses at frequencies from 320 to 380 GHz.
2：Sample Selection and Data Sources:
Four chips with varying linewidths and slotwidths of the Fabry–P(cid:2)erot lines are fabricated on a single 350 lm thick Sapphire wafer.
3：List of Experimental Equipment and Materials:
The setup includes a commercial photomixer continuous wave (CW) source, a He-3/He-4 sorption cooler, and a Microwave Kinetic Inductance Detector (MKID).
4：Experimental Procedures and Operational Workflow:
The FP transmission is measured by sweeping the CW source from 310 GHz to 380 GHz in 10 MHz steps with an integration time of 1 s.
5：Data Analysis Methods:
The individual peaks are fitted with a Lorentzian function to obtain the loaded Q-factor QL.
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
