Since the transmission of anisotropic nano-structures is sensitive to the polarisation of an incident beam, a novel polarising beam splitter (PBS) based on silicon nanobrick arrays is proposed. With careful design of such structures, an incident beam with polarisation direction aligned with the long axis of the nanobrick is almost totally reflected (similar to 98.5%), whilst that along the short axis is nearly totally transmitted (similar to 94.3%). More importantly, by simply changing the width of the nanobrick we can shift the peak response wavelength from 1460 nm to 1625 nm, covering S, C and L bands of the fiber telecommunications windows. The silicon nanobrick-based PBS can find applications in many fields which require ultracompactness, high efficiency, and compatibility with semiconductor industry technologies. (C) 2016 Optical Society of America
National Natural Science Foundation of China (NSFC)(11374235
; Project of Geographic Information for Surveying and Mapping(201412007
; 11574240)
; 201512016)
