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A compact Vivaldi antenna with enhanced gain having band notch characteristics in the WLAN band (5.15–5.825GHz) is proposed. By using combination of corrugation and grating elements, the gain of antenna B is improved and the side lobe levels of the radiation pattern are reduced over the ultra-wideband (UWB). Based the high gain Vivaldi antenna B, the antenna C with the notch band limited by the WLAN...
In this paper, a novel band-notched ultrawideband (UWB) multiple-input-multiple-output(MIMO) antenna with high notch-band-edge selectivity is proposed and demonstrated. The proposed antenna consists of two radiation patch, and four slot-type split ring resonators (SRR) are embedded on radiation patch and ground. In this way, a high notch-band-edge selectivity MIMO antenna is obtained. As compared...
The spontaneous emission rate of light emitters has been shown to have strong dependence on their local electromagnetic environment1. Optical antennas exploit this effect and can be used to greatly increase the spontaneous emission rate of a coupled light emitter. There have been several demonstrations of this effect with promising results using dye molecules and Er3+ ions2,3. It is predicted that...
A self-aligned process is developed to couple monolayer WSe2 (30nm × 300nm) to a silver cavity-backed slot-antenna. Optical emission measurements show 340x enhancement in spontaneous emission. Carrier lifetimes of <1ps are measured by streak camera.
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