Versatile generation and manipulation of phase-structured light beams using on-chip subwavelength holographic surface gratings.

ABSTRACT: Phase-structured light beams carrying orbital angular momentum (OAM) have a wide range of applications ranging from particle trapping to optical communication. Many techniques exist to generate and manipulate such beams but most suffer from bulky configurations. In contrast, silicon photonics enables the integration of various functional components on a monolithic platform, providing a way to miniaturize optical systems to chip level. Here, we propose a series of on-chip subwavelength holographic waveguide structures that can convert the in-plane guided modes into desired wavefronts and realize complex free-space functions, including the generation of complex phase-structured light beams, arbitrarily directed vortex beam emission and vortex beam focusing. We use a holographic approach to d

SUBMITTER: Zheng S 

PROVIDER: S-EPMC11501405 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature