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Silicon has many favorable attributes from both the device physics and manufacturing standpoints, and is therefore the pre-eminent material for micro- and nanoelectronics. Furthermore, due to its transparency at infrared wavelengths, silicon-based integrated photonics play a key role in modern optical communications devices. Silicon-based nano-optical antennas have also attracted much interest recently,...
We experimentally demonstrate that, by varying their diameter, the visible-to-infrared reflectance spectra of arrays of vertical Ge nanowires can be tuned. The results could enable future nanowire-based photodetectors with tailored responsivity spectra.
We present a superhydrophobic silicon bulls-eye. Water droplets remain centered as they dry, enabling delivery of nanoparticles or molecules to the center. SERS spectra of molecules (R6G) at very low concentrations (10−15 M) are demonstrated.
We demonstrate large field-of-view (FOV) (30 mm2) fluorescence microscopy with submicron resolution using a refractive microlens array. The large area of the array decreases image acquisition time over FOVs by avoiding long-range mechanical scanning.
Nano-structured lenses are designed to capture two different images of a scene depending on the polarization of the illumination. The polarization dependence is based on form birefringence found in elliptical cross-section silicon nanowires.
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