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We present the local capacitor model that enables a simple, yet accurate description of lightning rod effect in nanoplasmonics. The λ-zone capacitance is proposed and applied to predict strongly induced electric field near metal edges.
Terahertz (THz) electromagnetic wave has been widely used as a spectroscopic probe to detect the collective vibrational mode in vast molecular systems and investigate dielectric properties of various materials. Recent technological advances in generating intense THz radiation and the emergence of THz plasmonics operating with nanoscale structures have… (More)
In this paper we have presented a single inductor single output dc-dc synchronous boost converter using 5MHz switching frequency, ultimately reducing the inductor and capacitor sizes. Synchronous rectification has been employed. In the feedback loop we proposed a technique of smooth loop handover. For the dynamic load conditions we propose another technique… (More)
Metals can transmit light by tunnelling when they possess skin-depth thickness. Tunnelling can be resonantly enhanced if resonators are added to each side of a metal film, such as additional dielectric layers or periodic structures on a metal surface. Here we show that, even with no additional resonators, tunnelling resonance can arise if the metal film is… (More)
Molecular recognition and discrimination of carbohydrates are important because carbohydrates perform essential roles in most living organisms for energy metabolism and cell-to-cell communication. Nevertheless, it is difficult to identify or distinguish various carbohydrate molecules owing to the lack of a significant distinction in the physical or chemical… (More)