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We propose a scheme to experimentally investigate cross-talk in closely positioned QD photodetectors. A cross-talk of ∼25.8% at separation of 212 nm is demonstrated in pre-optimized devices.
We propose a color-selective photodetection scheme through integration of Au nanoparticles with CdSe/ZnS quantum dot photodetectors. Preliminary experimental results confirm enhancement of photodetector external quantum efficiency at wavelengths near the plasmonic resonance of Au nanoparticles.
We fabricate Au bowtie nanoantennas by electron beam lithography and study their spectral characteristics using polarization-resolved dark field scattering spectroscopy. A single particle dipole resonance at ~600 nm and a dimer interaction resonance peak at ~790 nm are observed. The relative strength of the ~790 nm resonance increases with decreasing distance between comprising antenna arms while...
Sub-diffraction nanophotonic waveguides are achieved via molecular self-assembly of quantum dots (QDs) and near-field interaction between the QDs. Nanoscale photodetectors with high spatial resolution and sensitivity are also demonstrated by compatible fabrication process.
Faceted single-crystalline ZnO tubes were synthesized by a simple soft solution method at 65 ° C. These tubes are of several micrometers in length and several hundred nanometers in diameter, with bell-mouths on each end. Structural characterizations using electron spectroscopy revealed that these hexagonal ZnO tubes were along [0 0 0 1] direction and side-enclosed by {011¯0} facets. The growth of...
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