Kerr frequency combs in large-size, ultra-high-Q toroid microcavities with low repetition rates [Invited]
By overcoming fabrication limitations, we have successfully fabricated silica toroid microcavities with both large diameter (of 1.88 mm) and ultra-high-Q factor (of 3.3×108) for the first time, to the best of our knowledge. By employing these resonators, we have further demonstrated low-threshold Kerr frequency combs on a silicon chip, which allow us to obtain a repetition rate as low as 36 GHz. Such a low repetition rate frequency comb can now be directly measured through a commercialized optical-electronic detector.
基金项目：National Key R&D Program of China (2017YFA0303703, 2016YFA0302500); National Natural Science Foundation of China (NSFC)10.13039/501100001809 (61435007, 11574144, 61475099); Natural Science Foundation of Jiangsu Province10.13039/501100004608, China (BK20150015); Fundamental Research Funds for the Central Universities (021314380086).
Xiaoshun Jiang：National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and School of Physics, Nanjing University 210093, China
Min Xiao：National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and School of Physics, Nanjing University 210093, ChinaDepartment of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA
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Jiyang Ma, Xiaoshun Jiang, and Min Xiao, "Kerr frequency combs in large-size, ultra-high-Q toroid microcavities with low repetition rates [Invited]," Photonics Research 5(6), B54 (2017)