Abstract
A two-port transmission grating is analyzed to eliminate the zeroth order with a two-layer dielectric rectangle groove. The grating achieves high efficiency and polarization-independent properties. The optimized parameters of the grating are obtained by rigorous coupled-wave analysis and simulated annealing. At an incident wavelength of 800 nm with normal incidence, the efficiencies of ± 1st orders are 47.62% and 47.26% at TE and TM polarizations respectively, while the diffraction efficiencies at the 0th orders are less than 2%. Meanwhile, the diffraction efficiencies of the ± 1st orders exceed 46% at both polarizations with an ultra-wide bandwidth of 70 nm. In addition, the simplified modal method can well explain the complex physical mechanism of multi-mode superposition coupling in the grating. The simple structure of the target grating and the results of the fabrication tolerance analysis highlight its advantages in practical manufacturing.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
