A multifocal metalens,which focuses incident light at multiple foci,has many applications in imaging systems and optical communications.However,the traditional
Innovative label-free microspectroscopy,which can simultaneously collect Brillouin and Raman signals,is used to characterize the viscoelastic properties and che
Single-mode lasing in whispering-gallery mode (WGM) microresonators is challenging to achieve.In bottle microresonators,the highly non-degenerated WGMs are spat