Next Article in Journal
New Weighted Opial-Type Inequalities on Time Scales for Convex Functions
Previous Article in Journal
BlockNet: A Deep Neural Network for Block-Based Motion Estimation Using Representative Matching
Open AccessArticle

Design and Optimization of Plasmon Resonance Sensor Based on Micro–Nano Symmetrical Localized Surface

1
School of Electronic and Electrical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
2
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
3
Department of Medical Physics and Informatics, Bashkir State Medical University, Lenina st. 3, 450008 Ufa, Russia
*
Author to whom correspondence should be addressed.
Symmetry 2020, 12(5), 841; https://doi.org/10.3390/sym12050841
Received: 20 April 2020 / Revised: 13 May 2020 / Accepted: 15 May 2020 / Published: 20 May 2020
(This article belongs to the Special Issue Symmetry in Engineering Sciences 2020)
Surface Plasma resonance (SPR) sensors combined with biological receptors are widely used in biosensors. Due to limitations of measurement techniques, small-scale, low accuracy, and sensitivity to the refractive index of solution in traditional SPR prism sensor arise. As a consequence, it is difficult to launch commercial production of SPR sensors. The theory of localized surface plasmon resonance (LSPR) developed based on SPR theory has stronger coupling ability to near-field photons. Based on the LSPR sensing theory, we propose a submicron-sized golden-disk and graphene composite structure. By varying the thickness and diameter of the array disk, the performance of the LSPR sensor can be optimized. A graphene layer sandwiched between the golden-disk and the silver film can prevent the latter from oxidizing. Symmetrical design enables high-low concentration of dual-channel distributed sensing. As the fixed light source, we use a 632.8-nm laser. A golden nano-disk with 45 nm thickness and 70 nm radius is designed, using a finite difference time domain (FDTD) simulation system. When the incident angle is 42°, the figure of merit (FOM) reaches 8826, and the measurable refractive index range reaches 0.2317. View Full-Text
Keywords: LSPR; graphene; optical sensor; sub-micron structures LSPR; graphene; optical sensor; sub-micron structures
Show Figures

Figure 1

MDPI and ACS Style

Yin, F.; Liu, J.; Yang, H.; Kudreyko, A.; Huang, B. Design and Optimization of Plasmon Resonance Sensor Based on Micro–Nano Symmetrical Localized Surface. Symmetry 2020, 12, 841.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop