Integrated and DC-powered superconducting microcomb

Chen-Guang Wang, Wuyue Xu, Chong Li, Lili Shi, Junliang Jiang, Tingting Guo, Wen-Cheng Yue, Tianyu Li, Ping Zhang, Yang-Yang Lyu, Jiazheng Pan, Xiuhao Deng, Ying Dong, Xuecou Tu, Sining Dong, Chunhai Cao, Labao Zhang, Xiaoqing Jia, Guozhu Sun, Lin Kang, Jian Chen, Yong-Lei Wang (), Huabing Wang () and Peiheng Wu ()
Additional contact information
Chen-Guang Wang: Nanjing University
Wuyue Xu: Nanjing University
Chong Li: Nanjing University
Lili Shi: Nanjing University
Junliang Jiang: Nanjing University
Tingting Guo: Nanjing University
Wen-Cheng Yue: Nanjing University
Tianyu Li: Nanjing University
Ping Zhang: Nanjing University
Yang-Yang Lyu: Nanjing University
Jiazheng Pan: Purple Mountain Laboratories
Xiuhao Deng: Southern University of Science and Technology
Ying Dong: China Jiliang University
Xuecou Tu: Nanjing University
Sining Dong: Nanjing University
Chunhai Cao: Nanjing University
Labao Zhang: Nanjing University
Xiaoqing Jia: Nanjing University
Guozhu Sun: Nanjing University
Lin Kang: Nanjing University
Jian Chen: Nanjing University
Yong-Lei Wang: Nanjing University
Huabing Wang: Nanjing University
Peiheng Wu: Nanjing University

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract Frequency combs, specialized laser sources emitting multiple equidistant frequency lines, have revolutionized science and technology with unprecedented precision and versatility. Recently, integrated frequency combs are emerging as scalable solutions for on-chip photonics. Here, we demonstrate a fully integrated superconducting microcomb that is easy to manufacture, simple to operate, and consumes ultra-low power. Our turnkey apparatus comprises a basic nonlinear superconducting device, a Josephson junction, directly coupled to a superconducting microstrip resonator. We showcase coherent comb generation through self-started mode-locking. Therefore, comb emission is initiated solely by activating a DC bias source, with power consumption as low as tens of picowatts. The resulting comb spectrum resides in the microwave domain and spans multiple octaves. The linewidths of all comb lines can be narrowed down to 1 Hz through a unique coherent injection-locking technique. Our work represents a critical step towards fully integrated microwave photonics and offers the potential for integrated quantum processors.

Date: 2024
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DOI: 10.1038/s41467-024-48224-1

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