Ultra-broadband on-chip twisted light emitter for optical communications.

ABSTRACT: On-chip twisted light emitters are essential components of orbital angular momentum (OAM) communication devices^{1, 2}. These devices address the growing demand for high-capacity communication systems by providing an additional degree of freedom for wavelength/frequency division multiplexing (WDM/FDM). Although whispering-gallery-mode-enabled OAM emitters have been shown to possess some advantages^{3, 4, 5}, such as compactness and phase accuracy, their inherent narrow bandwidths prevent them from being compatible with WDM/FDM techniques. Here, we demonstrate an ultra-broadband multiplexed OAM emitter that utilizes a novel joint path-resonance phase control concept. The emitter has a micron-sized radius and nanometer-sized features. Coaxial OAM beams are emitted across the

SUBMITTER: Xie Z 

PROVIDER: S-EPMC6060059 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature