Multifunctional on-chip directional coupler for spectral and polarimetric routing of Bloch surface wave.

ABSTRACT: Integration of multiple diversified functionalities into an ultracompact platform is crucial for the development of on-chip photonic devices. Recently, a promising all-dielectric two-dimensional platform based on Bloch surface waves (BSWs) sustained by dielectric multilayer has been proposed to enable various functionalities and provide novel approach to photonic devices. Here, we design and fabricate a multifunctional directional coupler to achieve both spectral and polarimetric routing by employing asymmetric nanoslits in a dielectric multilayer platform. Due to the dispersion property of BSWs, the directional coupling behavior is sensitive to wavelength and polarization. We demonstrate numerically and experimentally the wavelength selective directional coupling of TE BSW mode with an in

SUBMITTER: Lei X 

PROVIDER: S-EPMC11501675 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature