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Three-Dimensional Polarization-Insensitive Perfect Absorber Using Nanorods Array for Sensing and Imaging

机译:使用纳米ODS阵列进行传感和成像的三维偏振不敏感完美吸收器

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摘要

The analysis of a plasmon-induced transparency (PIT) effect in silver metasurface with using a square array of nanorods is numerically and analytically reported. The properties of the structure as a function of geometrical parameters, plasmonic metasurface materials, and incident angles with different polarizations are analyzed to improve the performance of the structure in terms of sensitivity and tunability. A proposed structure can operate with a high value of sensitivity of 1200nm/RIU when the changing of the sensing material refractive index is 0.2RIU, which stems from the high intensity of the electric field in nanorods array. The PIT wavelengths are not sensitive to the incident angle and its polarization, as well. Moreover, the array of nanorods has a nanoscale footprint of 200nm x 200nm x 50nm, which is proper for photonic integrated circuits. This scheme paves the way for designing nanosensor devices with perfect absorbing.
机译:在数值和分析地报告了使用纳米棒的纳米峰阵列的银质元表面中的等离子体诱导透明度(坑)效应的分析。分析了作为几何参数,等离子体元表面材料和具有不同偏振的入射角的函数的结构的性质,以提高结构的性能,在灵敏度和可调性方面。当传感材料折射率的改变为0.2RIU时,所提出的结构可以以1200nm / Riu的高灵敏度为60nm / Riu的操作,其源于纳米棒阵列中的电场的高强度。凹坑波长对入射角并不敏感,以及其极化。此外,纳米棒阵列具有200nm×200nm×50nm的纳米级占地面积,其适用于光子集成电路。该方案铺平了设计具有完美吸收的纳米传感器器件的方式。

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