Microlenses or arrays are key elements in many applications.However,their construction methods involve multiple fabrication processes,thereby increasing the complexity and cost of fabrication.In this study,we demonstr...Microlenses or arrays are key elements in many applications.However,their construction methods involve multiple fabrication processes,thereby increasing the complexity and cost of fabrication.In this study,we demonstrate an optically anisotropic,electrically tunable liquid crystal(LC)microlens array using a simple,one-step fabrication method.The microlens array is formed via photopolymerization-induced phase separation inside a polymer/LC composite.It possesses both polarization-dependent and electrically tunable focusing and imaging properties.Without applying voltage,the microlens array has a natural focal length of 8 mm,which is a result of its inherent gradient refractive index profile.Upon applying voltage above the threshold,the LC molecules reorient along the electric field direction and the focal length of the microlens array gradually increases.Based on its superior properties,the microlens array is further used for integral imaging applications,demonstrating electrically tunable central depth plane.Such LC microlens arrays could find numerous potential applications owing to their advantageous features of being flat,ultra-thin,and tunable,including 3D displays,optical interconnects,and more.展开更多
Nowadays,the electromagnetic properties of artificial photonic materials can be well-tuned via designs over their composition and geometries.However,engineering the properties of artificial materials at the nanoscale ...Nowadays,the electromagnetic properties of artificial photonic materials can be well-tuned via designs over their composition and geometries.However,engineering the properties of artificial materials at the nanoscale is challenging and costly.Here we demonstrate a facile and low-cost method for fabricating large-area silver nanoparticle metasurfaces(AgNPMSs)by using the vectorial holography-mediated growth technique.The AgNPMS,which can be regarded as a hologram device,possesses excellent chiroptical properties.The vectorial holographic technique may open avenues for fabricating novel chiroptical metamaterials with large degrees of freedom,which can be further used for beam steering,photocatalysis,biosensing,etc.展开更多
基金supported in part by National Key R&D Program of China(Grant No.2021YFB2802300)National Natural Science Foundation of China(Grant No.62075093 and 62211530039)+3 种基金Guangdong Innovative and Entrepreneurial Research Team Program(Grant No.2017ZT07C071)Shenzhen Science and Technology Innovation Commission(Grant No.JCYJ20220818100413030)Shenzhen Development and Reform Commission(Grant No.XMHT20220114005)funded by the Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University(Grant No.KJS2132).
文摘Microlenses or arrays are key elements in many applications.However,their construction methods involve multiple fabrication processes,thereby increasing the complexity and cost of fabrication.In this study,we demonstrate an optically anisotropic,electrically tunable liquid crystal(LC)microlens array using a simple,one-step fabrication method.The microlens array is formed via photopolymerization-induced phase separation inside a polymer/LC composite.It possesses both polarization-dependent and electrically tunable focusing and imaging properties.Without applying voltage,the microlens array has a natural focal length of 8 mm,which is a result of its inherent gradient refractive index profile.Upon applying voltage above the threshold,the LC molecules reorient along the electric field direction and the focal length of the microlens array gradually increases.Based on its superior properties,the microlens array is further used for integral imaging applications,demonstrating electrically tunable central depth plane.Such LC microlens arrays could find numerous potential applications owing to their advantageous features of being flat,ultra-thin,and tunable,including 3D displays,optical interconnects,and more.
基金the National Natural Science Foundation of China(62075093 and 61805113)the Guangdong Innovative and Entrepreneurial Research Team Program(2017ZT07C071)+1 种基金the Natural Science Foundation of Guangdong Province(2017A030313034 and 2018A030310224)Shenzhen Science and Technology Innovation Commission(JCYJ20170817111349280,JCYJ20180305180635082,and GJHZ20180928155207206)。
文摘Nowadays,the electromagnetic properties of artificial photonic materials can be well-tuned via designs over their composition and geometries.However,engineering the properties of artificial materials at the nanoscale is challenging and costly.Here we demonstrate a facile and low-cost method for fabricating large-area silver nanoparticle metasurfaces(AgNPMSs)by using the vectorial holography-mediated growth technique.The AgNPMS,which can be regarded as a hologram device,possesses excellent chiroptical properties.The vectorial holographic technique may open avenues for fabricating novel chiroptical metamaterials with large degrees of freedom,which can be further used for beam steering,photocatalysis,biosensing,etc.
