Fabrication and characterization of electro-optic modulators based on the novel organic electro-optic materials composed of self-assembled superlattices (SAS) were presented, both wet-dipping self-assembly and vapor p...Fabrication and characterization of electro-optic modulators based on the novel organic electro-optic materials composed of self-assembled superlattices (SAS) were presented, both wet-dipping self-assembly and vapor phase deposition approaches were discussed. Prototype waveguide electro-optic modulators were fabricated using SAS films integrated with low-loss polymeric materials functioning as partial guiding and cladding layers.Promising electro-optic thin film materials including DTPT and PEPCOOH grown from the vapor phase were used for fabrication and test of electro-optic prototype modulators. Finally,the EO coefficient of tens of pm/V was obtained,which can sufficiently support high-speed and small size EO modulators.展开更多
An intersecting cavern is a common structural form used in underground engineering,and its safety and stability performance directly control the service performance of the whole project.The dynamic responses of the th...An intersecting cavern is a common structural form used in underground engineering,and its safety and stability performance directly control the service performance of the whole project.The dynamic responses of the three kinds of crossing type(+-shaped,T-shaped,L-shaped)caverns subjected to ground shock were studied by numerical simulation.The velocity plus force mode boundary setting method was proposed in the coupled static and dynamic analysis of a deep underground cavern.The results show that,among the three types of crossing caverns,the+-shaped cavern is the most significantly affected by the dynamic action,followed by T-shaped,and then L-shaped caverns.The vault settlement,straight wall deformation,vault peak particle velocity,effective plastic strain of surrounding rock,and maximum principal stress and strain at the bottom of the lining of the straight wall increase with the increase of cavern span.The vault settlement,straight wall deformation,effective plastic strain of surrounding rock,and the maximum principal stress and strain at the bottom of lining to the straight wall decrease with the increase of lateral pressure coefficient,and the peak particle velocity at the vault increases.The variation is small compared with the change of cavern span.The influence range of the underground cavern intersection is two cavern diameters from the intersection centre.The bottom of the straight wall at the intersection is the weak part.It is suggested to thicken the support locally to improve the stability of the cavern.展开更多
文摘Fabrication and characterization of electro-optic modulators based on the novel organic electro-optic materials composed of self-assembled superlattices (SAS) were presented, both wet-dipping self-assembly and vapor phase deposition approaches were discussed. Prototype waveguide electro-optic modulators were fabricated using SAS films integrated with low-loss polymeric materials functioning as partial guiding and cladding layers.Promising electro-optic thin film materials including DTPT and PEPCOOH grown from the vapor phase were used for fabrication and test of electro-optic prototype modulators. Finally,the EO coefficient of tens of pm/V was obtained,which can sufficiently support high-speed and small size EO modulators.
基金This research is funded by the National Natural Science Foundation of China(No.51478469).
文摘An intersecting cavern is a common structural form used in underground engineering,and its safety and stability performance directly control the service performance of the whole project.The dynamic responses of the three kinds of crossing type(+-shaped,T-shaped,L-shaped)caverns subjected to ground shock were studied by numerical simulation.The velocity plus force mode boundary setting method was proposed in the coupled static and dynamic analysis of a deep underground cavern.The results show that,among the three types of crossing caverns,the+-shaped cavern is the most significantly affected by the dynamic action,followed by T-shaped,and then L-shaped caverns.The vault settlement,straight wall deformation,vault peak particle velocity,effective plastic strain of surrounding rock,and maximum principal stress and strain at the bottom of the lining of the straight wall increase with the increase of cavern span.The vault settlement,straight wall deformation,effective plastic strain of surrounding rock,and the maximum principal stress and strain at the bottom of lining to the straight wall decrease with the increase of lateral pressure coefficient,and the peak particle velocity at the vault increases.The variation is small compared with the change of cavern span.The influence range of the underground cavern intersection is two cavern diameters from the intersection centre.The bottom of the straight wall at the intersection is the weak part.It is suggested to thicken the support locally to improve the stability of the cavern.
