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Planar dielectric reflectors with polarization-independent focusing ability promise to replace conventional free-space components for applications in on-chip optoelectronic integration. A polarization-independent focusing reflector using a square two-dimensional (2D) subwavelength grating (SWG) has been both numerically and experimentally demonstrated. The 2D SWG can provide high focusing power by...
Sub-wavelength gratings are used in the new photodetector in this paper. The detectivity is enhanced by excitation of surface plasma waves (SPW) using a Metal Aperture Arrays grating. Sub-wavelength dielectric grating is used to replace the top Bottom Distributed Bragg Reflectors(DBR).
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