We design and investigate a triple-band plasmonic metamaterial absorber (PMA) for sensor application. The underlying mechanism is investigated theoretically and numerically. Three characteristic absorption peaks are demonstrated to be induced by different plasmonic modes which lead to different responses for the plasmonic sensor. These modes show great improvement for the sensitivity and accuracy of the plasmonic sensors. This triple-band plasmonic metamaterial optical absorber has great potential to improve the performance in practical applications.

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A wireless DALI controlled electronic ballast for ultraviolet lamp (UVL) with high-sterilization quality and energy-saving control is proposed in this paper. Up to a maximum of 64 UVLs can be simultaneously controlled through the digitally addressable lighting interface (DALI) by the devised system to provide large-scale sterilization applications. The proposed configuration consists of a digitally-controlled electronics ballast for UV lamp, a Zigbee-based DALI bridge module for wireless control, and a remote controller for inputting the control parameters. Performance and energysaving effectiveness of the proposed control scheme is demonstrated on a prototype experimental system.

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