多层 SERS 基底的数值优化技术

IF 2.1 4区物理与天体物理 Q2 OPTICS

Photonics Pub Date : 2023-12-25 DOI:10.3390/photonics11010012

Alexey Kadochkin, Andrey Savitskiy, D. Korobko, E. Kitsyuk

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引用次数: 0

摘要

我们提出了一种利用有限元分析对三维（3D）SERS 基底进行数值优化的技术。利用光学互易定理，我们证明了使用珀塞尔因子作为决定 SERS 基底质量的目标函数比使用众所周知的局部场增强标准更为正确。这使我们能够考虑到包含多个发射器的任意三维结构中局部场的细节不均匀性。我们已经从理论上证明，使用三维 CNT 结构作为纳米粒子基底，而不是纳米粒子单层，可以实现 SERS 信号的增强。

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Numerical Optimization Technique of Multilayer SERS Substrates

A numerical optimization technique of a three-dimensional (3D) SERS substrate with finite element analysis is proposed. Using the optical reciprocity theorem, we have shown that instead of the well-known local field enhancement criterion, it is more correct to use the Purcell factor as an objective function that determines the quality of the SERS substrate. This allows us to take into account the detail inhomogeneity of local fields in an arbitrary three-dimensional structure containing multiple emitters. We have theoretically shown that employment of a 3D CNT structure as a nanoparticle substrate instead of a nanoparticle monolayer allows one to achieve the enhancement of the SERS signal.

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来源期刊

Photonics Physics and Astronomy-Instrumentation

CiteScore

2.60

自引率

20.80%

发文量

817

审稿时长

8 weeks

期刊介绍： Photonics (ISSN 2304-6732) aims at a fast turn around time for peer-reviewing manuscripts and producing accepted articles. The online-only and open access nature of the journal will allow for a speedy and wide circulation of your research as well as review articles. We aim at establishing Photonics as a leading venue for publishing high impact fundamental research but also applications of optics and photonics. The journal particularly welcomes both theoretical (simulation) and experimental research. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.