Integrated and DC-powered superconducting microcomb
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.
Cite
@article{arxiv.2405.09180,
title = {Integrated and DC-powered superconducting microcomb},
author = {Chen-Guang Wang and Wuyue Xu and Chong Li and Lili Shi and Junliang Jiang and Tingting Guo and Wen-Cheng Yue and Tianyu Li and Ping Zhang and Yang-Yang Lyu and Jiazheng Pan and Xiuhao Deng and Ying Dong and Xuecou Tu and Sining Dong and Chunhai Cao and Labao Zhang and Xiaoqing Jia and Guozhu Sun and Lin Kang and Jian Chen and Yong-Lei Wang and Huabing Wang and Peiheng Wu},
journal= {arXiv preprint arXiv:2405.09180},
year = {2024}
}