Efficient and Broadband Four-Wave Mixing in a Compact Silicon Subwavelength Nanohole Waveguide

被引:8
作者
Yang, Yuxing [1 ]
Sun, Lu [1 ]
Zhang, Yong [1 ]
Su, Yikai [1 ]
机构
[1] Shanghai Jiao Tong Univ, Dept Elect Engn, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
four-wave mixing; integrated devices; nonlinear optics; optical nanostructures; ENHANCEMENT;
D O I
10.1002/adom.201900810
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Confining light in a small volume offers an effective approach to enhance the four-wave mixing (FWM) process. Recently, most efforts are devoted to improve the conversion efficiencies by using resonant structures. As a result, the bandwidths of the FWM conversions are typically limited to 1-2 nm. In this paper, a nonresonant silicon subwavelength nanohole waveguide is proposed to manipulate the field distribution of the propagating wave. The electromagnetic field of the Bloch mode can be engineered to concentrate in the silicon area where the FWM process occurs. Benefiting from the enhanced light intensity, an efficient and broadband FWM process is experimentally demonstrated. A conversion efficiency of -26.7 dB is achieved with a carefully designed silicon nanohole waveguide, showing a 12.5 dB improvement relative to a conventional silicon strip waveguide. The 3 dB conversion bandwidth of the silicon nanohole waveguide is approximate to 37 nm, limited by the optical amplifiers employed in the experiment.
引用
收藏
页数:6
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