By NdFeB magnetic powders treated with the silicon cou-pling agents, mechanical properties of the magnetic composite are remark-ably improved, and its magnetic properties are not affected. The experi-ments show that t...By NdFeB magnetic powders treated with the silicon cou-pling agents, mechanical properties of the magnetic composite are remark-ably improved, and its magnetic properties are not affected. The experi-ments show that the silicon coupling agents react with the oxidates in the surface of NdFeB magnetic powders so that a good adhesiveness can be formed between epoxy resin and NdFeB powders. The results still indicate that the silk or wavy morphological structures in the fracture surface of the magnetic composite are more advantageous to its mechanical properties.展开更多
Frequency conversion is pivotal in nonlinear optics and quantum optics for manipulating and translating light signals across different wavelength regimes.Achieving frequency conversion between two light beams with a s...Frequency conversion is pivotal in nonlinear optics and quantum optics for manipulating and translating light signals across different wavelength regimes.Achieving frequency conversion between two light beams with a small frequency interval is a central challenge.In this work,we design a pair of coupled silicon microrings wherein coupled-induced modesplitting exists to achieve a small frequency shift by the process of four-wave mixing Bragg scattering.As an example,the signal can be up or down converted to the idler which is 15.5 GHz spaced when two pumps align with another pair of split resonances.The results unveil the potential of coupled microring resonators for small interval frequency conversion in a high-fidelity,all-optical,and signal processing quantum frequency interface.展开更多
文摘By NdFeB magnetic powders treated with the silicon cou-pling agents, mechanical properties of the magnetic composite are remark-ably improved, and its magnetic properties are not affected. The experi-ments show that the silicon coupling agents react with the oxidates in the surface of NdFeB magnetic powders so that a good adhesiveness can be formed between epoxy resin and NdFeB powders. The results still indicate that the silk or wavy morphological structures in the fracture surface of the magnetic composite are more advantageous to its mechanical properties.
基金Project supported by the National Key Research and Development Program of China(Grant No.2022YFF0712800)。
文摘Frequency conversion is pivotal in nonlinear optics and quantum optics for manipulating and translating light signals across different wavelength regimes.Achieving frequency conversion between two light beams with a small frequency interval is a central challenge.In this work,we design a pair of coupled silicon microrings wherein coupled-induced modesplitting exists to achieve a small frequency shift by the process of four-wave mixing Bragg scattering.As an example,the signal can be up or down converted to the idler which is 15.5 GHz spaced when two pumps align with another pair of split resonances.The results unveil the potential of coupled microring resonators for small interval frequency conversion in a high-fidelity,all-optical,and signal processing quantum frequency interface.
