Second Harmonic Generation Enabled by Longitudinal Electric Field Components in Photonic Wire Waveguides
Nicolas Poulvellarie, Utsav Dave, Koen Alexander, Charles Ciret, Maximilien Billet, Carlos Mas Arabi, Fabrice Raineri, Sylvain Combrie, Alfredo De Rossi, Gunthe… 展开作者
Nicolas Poulvellarie, Utsav Dave, Koen Alexander, Charles Ciret, Maximilien Billet, Carlos Mas Arabi, Fabrice Raineri, Sylvain Combrie, Alfredo De Rossi, Gunther Roelkens, Simon-Pierre Gorza, Bart Kuyken, Francois Leo
We investigate type I second harmonic generation in III-V semiconductor wire waveguides aligned with a crystallographic axis. In this direction, because of the single nonzero tensor element of III-V semiconductors, only frequency conversion by mixing with the longitudinal components of the optical fields is allowed. We experimentally study the impact of the propagation direction on the conversion efficiency and confirm the role played by the longitudinal components through the excitation of an antisymmetric second harmonic higher order mode.
Near-Zero Crosstalk and Ultra-Low Loss Waveguide Crossings Enabled by three-dimensional Ta2O5-on-LNOI Integrated Photonic Platform
East China Normal University（华东师范大学）；Shanxi University（山西大学）；Shandong Normal University（山东师范大学）；Shanghai Research Center for Quantum Sciences（上海量子科学研究中心）；Hefei National Laboratory（合肥国家实验室）
A power-in-bucket model enabled designs of nanostructure-enhanced waveguides for highly efficient wide-angle light couplings
Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences（杭州高等研究院，中国科学院大学）；Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences（上海光学精密机械研究所，中国科学院）；Zhejiang University（浙江大学）
Deep-ultraviolet Cherenkov radiation in all-normal-dispersion waveguide enabled by spatial-temporal dynamics
State Key Laboratory of Ultra-intense Laser Science and Technology, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS)（超强激光科学与技术国家重点实验室，中国科学院上海光学精密机械研究所）；Russell Centre for Advanced Lightwave Science, Shanghai Institute of Optics and Fine Mechanics (SIOM) and Hangzhou Institute of Optics and Fine Mechanics (HIOM)（先进光波科学中心，中国科学院上海光学精密机械研究所和中国科学院杭州光学精密机械研究所）；Zhejiang Key Laboratory of Microstructured Specialty Optical Fiber, Hangzhou Institute of Optics and Fine Mechanics (HIOM)（微结构特种光纤浙江省重点实验室，中国科学院杭州光学精密机械研究所）；State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University（介观物理国家重点实验室和纳米光电前沿科学中心，北京大学物理学院）；Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences（杭州高等研究院，中国科学院大学）；Zhangjiang Laboratory（张江实验室）
1-GHz VIS-to-MIR frequency combs enabled by CMOS-compatible nanophotonic waveguides
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences（中国科学院上海光学精密机械研究所）；University of Chinese Academy of Sciences（中国科学院大学）；Shanghai University（上海大学）；Hefei National Laboratory, University of Science and Technology of China（中国科学技术大学合肥国家实验室）
Meta-surface-enabled ultra-sharp multimode waveguide bends on silicon
模分复用（MDM）是一种通过在多模总线波导中使用多个模式信道来增加光互连的单波长链路容量的方法，在MDM系统中，为了路由数据，通常需要波导弯曲，特别是为了减少高密度光子集成电路（PIC）占用的芯片面积，需要使用超尖锐弯曲。本文提出并实现了一种新型的硅基超表面波导结构，该结构可以实现多模波导的低损耗和低串扰的超尖锐S型弯曲，并在三个模式通道的MDM光互连中实现了弯曲半径R=10μm的超尖锐S型弯曲。数值模拟结果表明，在宽的波长范围内（> 100 nm），超锐金属表面多模波导弯曲（MMWB）具有较低的附加损耗（0.2~0.5dB）和较低的模间串扰（<-30dB）。实验结果表明，所制备的S弯具有0.5~0.8dB的附加损耗和60 nm的模间串扰<-20 dB over a wavelength of >。实验结果部分受到测量设置的限制，特别是具有约-20dB的模间串扰的片上模（解）复用器。该多模波导可以扩展到三个以上的模式通道传输，为利用硅光子波导结构实现片上多模光互连奠定了基础。
