Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 54, Issue 38, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ac05fb
Keywords
electromagnetically induced transparency; surface plasmon polaritons; insulator-metal-insulator structure
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Funding
- National Natural Science Foundation of China (NSFC) [61520106013, 61727816, 51661145025]
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In this paper, a nanosystem is proposed to achieve an EIT-like effect in plasmonic sensors using a gold grating and a three-layer structure, enriching the implementation of sensors.
Electromagnetically induced transparency-like (EIT-like) effect is a very promising research area for ultra-sensitive sensing. Most sensors are either wavelength modulated or intensity modulated. In this paper, we propose a nanosystem, in which an EIT-like effect is generated for plasmonic sensors with integrated wavelength-modulated and intensity-modulated functions. The nanosystem consists of a gold (Au) grating andthree-layer insulator-metal-insulator structure. An EIT-like effect is formed by the destructive interference of surface plasmon polaritons (SPPs) on the upper and lower interfaces of the metallic layer. Using a two-oscillator coupling theory, we theoretically analyze the EIT-like effect and quantitatively reveal the damping characteristic of the two SPP modes and how they couple to each other. The presented nanosystem enriches the EIT-like implementation effect in plasmonic sensors.
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