Generation of Subdiffraction Optical Needles by Simultaneously Generating and Focusing Azimuthally Polarized Vortex Beams through Pancharatnam–Berry Metalenses
Zhe Shen, Shijie Huang • Nanomaterials
(2022)
Needle beams have received widespread attention due to their unique characteristics of high intensity, small focal size, and extended depth of focus (DOF). Here, a single–layer all–dielectric metalens based on Pancharatnam–Berry (PB) was us...
DOAJ
Open Access (DOAJ)
DOI:
10.3390/nano12224074