Abstract
Modal analysis of the 1×3 highly efficient reflective triangular
grating operating in the 800 nm wavelength under normal incidence for TE
polarization is presented in this Letter. The rigorous coupled wave analysis
and simulated annealing algorithm are used to design this beam splitter. The
reflective grating consists of a highly reflective mirror and a transmission
grating on the top. The mechanism of the reflective triangular grating is
clarified by the simplified modal method. Then, gratings are fabricated by
direct laser writing lithography.
© 2017 Chinese Laser Press
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