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Near-field intensity distributions of high-density amplitude gratings with period d=2.3λ and different duty cycles illuminated by TE and TM polarized waves are simulated by using the finite-difference time-domain method. Numerical results show that intensity distributions of in the grooves change differently when duty cycle varies for TE and TM polarizations. As duty cycle increases, peak intensity...
We present designs of high-efficiency compression grating based on total internal reflection (TIR) for picosecond pulse laser at 1053nm. The setup is devised by directly etching gratings into the bottom side of a prism so that light can successfully enter (or exit) the compression grating. Dependence of the −1 order diffraction efficiencies on the constructive parameters is analyzed for TE- and TM-polarized...
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