Wu Lue, Wang Heming, Yang Qifan, Ji Qing-Xin, Shen Boqiang, Bao Chengying, Gao Maodong, Vahala Kerry
Opt Lett. 2020 Sep 15;45(18):5129-5131. doi: 10.1364/OL.394940.
High optical quality (Q) factors are critically important in optical microcavities, where performance in applications spanning nonlinear optics to cavity quantum electrodynamics is determined. Here, a record Q factor of over 1.1 billion is demonstrated for on-chip optical resonators. Using silica whispering-gallery resonators on silicon, Q-factor data is measured over wavelengths spanning the C/L bands (100 nm) and for a range of resonator sizes and mode families. A record low sub-milliwatt parametric oscillation threshold is also measured in 9 GHz free-spectral-range devices. The results show the potential for thermal silica on silicon as a resonator material.
高光品质（Q）因子在光学微腔中至关重要，在从非线性光学到腔量子电动力学的各种应用中，其性能都由Q因子决定。在此，展示了片上光学谐振器超过11亿的创纪录Q因子。使用硅基二氧化硅回音壁谐振器，在跨越C/L波段（100纳米）的波长范围内以及一系列谐振器尺寸和模式族下测量了Q因子数据。在9吉赫兹自由光谱范围的器件中还测量到了创纪录的低于毫瓦级的参量振荡阈值。结果表明硅基热二氧化硅作为谐振器材料的潜力。
