Abstract
We present a systematic numerical study of a metal-dielectric-metal sandwich plasmonic structure for broadband resonant transmission at terahertz frequencies. The proposed structure consists of periodic slotted metallic arrays on both sides of a thin dielectric substrate and is demonstrated to exhibit a broad passband transmission response. Various design considerations have been investigated to exploit their influence on the transmission passband width and the center resonance frequency. The structure ensures a broadband transmission over a wide range of incident angles.
Highlights
The recent studies on metamaterial and plasmonic structures have been gaining enormous interest experimentally and theoretically in a broad range of disciplines [1,2,3]
We report on a strategy to create a novel structure that combines a metal-dielectric-metal (MDM) sandwich with a periodic slot structure to perform an ultrabroadband THz resonant filter with flatter transmission top
A unique plasmonic sandwich configuration has been considered to produce a structure having a broad passband at THz frequencies
Summary
The recent studies on metamaterial and plasmonic structures have been gaining enormous interest experimentally and theoretically in a broad range of disciplines [1,2,3]. A THz device is desired to control the pulsed or continuous-wave freely propagating THz radiation. The frequency, bandwidth, transmission power and modulation scheme of THz radiation may vary widely. We report on a strategy to create a novel structure that combines a metal-dielectric-metal (MDM) sandwich with a periodic slot structure to perform an ultrabroadband THz resonant filter with flatter transmission top. Such a device may provide a desirable filtering method and operation to select frequency band in the THz regime and lead to most practical applications
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