High-performance etching of multilevel phase-type Fresnel zone plates with large apertures
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DOI: 10.1016/j.optcom.2017.09.006
Abstract: Abstract To ensure the etching depth uniformity of large-aperture Fresnel zone plates (FZPs) with controllable depths, a combination of a point source ion beam with a dwell-time algorithm has been proposed. According to the obtained… read more here.
Keywords: large apertures; fresnel zone; zone plates; etching depth ... See more keywords
Etching depth modulation of sensing characteristics in PT-symmetric inhomogeneous ridged waveguide Bragg structures
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DOI: 10.1088/1402-4896/ae16e4
Abstract: The spectral characteristics of non-uniform PT-symmetry ridged waveguide Bragg gratings (PT-RWBG) with fully etched grooves are studied. A significant enhancement in the reflectivity of PT-symmetric gratings is achieved. Two types of non-uniform ridge waveguide gratings… read more here.
Keywords: reflectivity; etching depth; ridged waveguide; waveguide bragg ... See more keywords