Highly Sensitive Refractive Index Sensing with Surface Plasmon Polariton Waveguides

Semi-circle long-range dielectric-loaded surface plasmon-polariton waveguide (LR-DLSPPW) is proposed, in which a thin and narrow metal stripe (15-nm-thick and 500-nm-wide) is sandwiched between a semi-circle dielectric ridge(with the refractive index of 1.535 ,the radius of 777 nm) and a dielectric film (with the refractive index of 1.493) supported by low-index substrate (with the refractive index of 1.34). The mode effective index, propagation length, mode width and figures of merit of the fundamental mode supported using the finite-element method are calculated at the telecom wavelength λ =1.55μm for different dimensions (t) of the dielectric film. It was calculated that the optimized structure have the maximized parameters with figures of merit 3.75×10¬6and propagation length 3.7mm at t=570 nm. The semi-circle LR-DLSPPW structure is found to exhibit about 20% increase of the propagation length as compared to the conventional rectangular LR-DLSPPW while ridge thickness t≤600 nm. The proposed configuration allows for easy connection to electrodes enabling, and is technologically simple being compatible with planar fabrication using UV-lithography.

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Hybrid Tamm-surface plasmon polariton mode for highly sensitive detection of protein interactions

Optics Express ◽

10.1364/oe.401802 ◽

2020 ◽

Author(s):

Ernesta Buzavaite-Verteliene ◽

Ieva Plikusiene ◽

Tomas Tolenis ◽

Audrius Valavičius ◽

arunas ramanavicius ◽

...

Keyword(s):

Surface Plasmon ◽

Protein Interactions ◽

Surface Plasmon Polariton ◽

Sensitive Detection ◽

Surface Plasmon Polariton Mode ◽

Highly Sensitive ◽

Plasmon Polariton ◽

Highly Sensitive Detection

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Refractive Index Sensor Based on Long-Range Surface Plasmon Polariton Waveguide

Lecture Notes in Electrical Engineering - Proceedings of the 8th International Multidisciplinary Conference on Optofluidics (IMCO 2018) ◽

10.1007/978-981-13-3381-1_13 ◽

2021 ◽

pp. 71-75

Author(s):

Xiaoqiang Sun ◽

Yan Xu ◽

Pierre Berini ◽

Daming Zhang

Keyword(s):

Refractive Index ◽

Long Range ◽

Surface Plasmon ◽

Surface Plasmon Polariton ◽

Refractive Index Sensor ◽

Plasmon Polariton

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Characteristics of the Surface Plasmon–Polariton Resonance in a Metal Grating, as a Sensitive Element of Refractive Index Change

Materials ◽

10.3390/ma13081882 ◽

2020 ◽

Vol 13 (8) ◽

pp. 1882 ◽

Cited By ~ 1

Author(s):

Stefano Bellucci ◽

O. Vernyhor ◽

A. Bendziak ◽

I. Yaremchuk ◽

V. M. Fitio ◽

...

Keyword(s):

Refractive Index ◽

Surface Plasmon ◽

Surface Plasmon Polariton ◽

Refractive Index Change ◽

Numerical Data ◽

Grating Period ◽

Resonant Excitation ◽

Analytical Relationship ◽

Angle Of Incidence ◽

Plasmon Polariton

The resonant excitation of surface plasmon–polariton waves in metal gratings with rectangular and sinusoidal relief was studied. The main characteristics of the resonant excitation of a surface plasmon–polariton wave were obtained using analytical methods due to the fact that the resonance is excited at a grating thickness much smaller than a wavelength (1.064 µm). It is shown that the obtained results are very close to those calculated using numerical methods, e.g., Rigorous Coupled Wave Approach (RCWA). There is a small difference in the numerical data defined by both methods. The difference between the parameters for the two types of gratings is small. New analytical relationships of angular and spectral sensitivities with the change of the refractive index of the medium were obtained, depending on the grating period and the angle of incidence of the light beam. An analytical relationship between the spectral and angular widths of the resonant curves, at full width at half maximum, was determined.

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