A high-perform and compact subwavelength binary blazed grating optical switch was designed based on
TiO2-on-SiO2. By appropriate choice of grating parameters including thicknesses, periods, height, and fill factor, to
optimize the diffraction properties, a relative high diffraction efficiency and large diffraction angle was obtained
simultaneously. The diffraction efficiency of the first switching channel is about 80% with a 45° diffraction angle, and
the diffraction efficiency of the second channel is around 90% with a 30° diffraction angle. The device layout is simple,
feasible, one-step etch, and compatible with standard CMOS technology processing.
The amalgamation of parallel optical logic processors and parallel optical interconnections is essential for the
rapidly development of the parallel optical computing technologies. According to the light field distribution at the
filtering plane and the output plane of the 4-f optical correlator achieved by theory analysis, the 4-f correlator with
suitable filtering grating can implement free space optical Perfect Shuffle interconnection perfectly. The experiment
results of the left Perfect Shuffle and the right Perfect Shuffle indicate that, based on the 4-f correlators with filtering
grating, the parallel optical logic processors and the parallel optical interconnections can be accomplished perfectly by
the same optical structure, which may introduce the amalgamation of the parallel optical logic processor and the parallel
optical interconnection.
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