The subwavelength phase singularity was made possible thanks to a specially engineered nanostructure. The researchers constructed a chip-scale device made from two layers of gold nanorods sandwiching ...

Cross-section of the designed heart-shaped phase singularity sheet. The extended dark region in the center image is a cross-section of the singularity sheet. The phase is undefined on the singularity ...

(Nanowerk Spotlight) Plasmonic sensors or surface plasmon resonance (SPR) sensors are some of the most commonly-used optical sensing devices for real-time monitoring of chemical and biomolecular ...

Recent advances in femtosecond optical vortices (FOVs)—characterized by helical wavefronts and high peak power—have enabled breakthroughs in attosecond vortex generation and 3D chiral microfabrication ...