In order to determine the low interfacial tension,a spinning drop interfacial tensiometer was constructed.The apparatus was calibrated by measuring the interfacial tension of some low molecular weight systems and poly...In order to determine the low interfacial tension,a spinning drop interfacial tensiometer was constructed.The apparatus was calibrated by measuring the interfacial tension of some low molecular weight systems and polyethylene glycol /dextran aqueous two-phase systems,with the determination error of 3.The interfacial tensions of PEG1000/Na2SO4,PEG/MgSO4 and PEG1000/(NH4)2SO4 aqueous two-phase systems Were determined.It is found that the salt type has strong effect on the interfacial tension.展开更多
Pancharatnam-Berry(PB)phase elements are widely used for optical field modulation due to their precise control over beam amplitude and phase.However,conventional PB elements are inherently static,with fixed modulation...Pancharatnam-Berry(PB)phase elements are widely used for optical field modulation due to their precise control over beam amplitude and phase.However,conventional PB elements are inherently static,with fixed modulation functions post-fabrication,limiting their adaptability in complex application scenarios.In this paper,we propose a moiré-type PB element comprising two specially designed PB elements.The proposed element attaches the two spin states with rotation-dependent PB phases while preserving the spin,thereby enabling dynamic rotation-tunability of the PB phase.As a functional validation,we experimentally demonstrate the dynamic control over the rotation rate of the polarization-rotating beam.The moiré-type PB element was designed using the checker-board-phase encoding method and fabricated in liquid crystal via SD 1-based micro-lithography.A back-propagation correction is introduced to eliminate the diffraction effects caused by the element gap.An adjustable rotation rate of±240 deg/cm is achieved through±160 deg angular offset.Owing to its compact structure with high integration and operation simplicity,the moiré-type PB element offers a novel dynamic modulation solution for structured light field generation,particle manipulation,and advanced laser processing.展开更多
文摘In order to determine the low interfacial tension,a spinning drop interfacial tensiometer was constructed.The apparatus was calibrated by measuring the interfacial tension of some low molecular weight systems and polyethylene glycol /dextran aqueous two-phase systems,with the determination error of 3.The interfacial tensions of PEG1000/Na2SO4,PEG/MgSO4 and PEG1000/(NH4)2SO4 aqueous two-phase systems Were determined.It is found that the salt type has strong effect on the interfacial tension.
基金Supported by Special Funds for Major State Basic Research under Project(2012CB619203,2013CB922301)National Natural Science Foundation of China(11174306,61290304)Innovation Program of Shanghai Institute of Technical Physics of the Chinese Academy of Sciences(Q-ZY-76)
基金National Key Research and Development Program of China(2022YFA1404800)National Natural Science Foundation of China(12474338,12474298,62305271,62175200,12374279,62475217)Fundamental Research Funds for the Central Universities(5110240015).
文摘Pancharatnam-Berry(PB)phase elements are widely used for optical field modulation due to their precise control over beam amplitude and phase.However,conventional PB elements are inherently static,with fixed modulation functions post-fabrication,limiting their adaptability in complex application scenarios.In this paper,we propose a moiré-type PB element comprising two specially designed PB elements.The proposed element attaches the two spin states with rotation-dependent PB phases while preserving the spin,thereby enabling dynamic rotation-tunability of the PB phase.As a functional validation,we experimentally demonstrate the dynamic control over the rotation rate of the polarization-rotating beam.The moiré-type PB element was designed using the checker-board-phase encoding method and fabricated in liquid crystal via SD 1-based micro-lithography.A back-propagation correction is introduced to eliminate the diffraction effects caused by the element gap.An adjustable rotation rate of±240 deg/cm is achieved through±160 deg angular offset.Owing to its compact structure with high integration and operation simplicity,the moiré-type PB element offers a novel dynamic modulation solution for structured light field generation,particle manipulation,and advanced laser processing.
