A dual - mode refractive index sensor based on multilayer gold nanodisk - intercalated UCNP heterogeneous metamaterial

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-09-27 DOI:10.1016/j.optlastec.2025.113936

Zihong Li , Shengbin Cheng , Xiaofeng Wu , Maolin Wen , Shiping Zhan

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引用次数: 0

Abstract

High-precision refractive index sensors are pivotal for medical diagnostics, environmental monitoring, and bioanalysis. This study presents a dual-mode refractive index sensor integrating spectral shift detection and fluorescence enhancement through a gold nanodisk-UCNP heterogeneous metamaterial. By optimizing structural parameters (e.g., metal layer number, nanodisk radius), tunable multiplexed band absorption is achieved. The platform exhibits strong local field amplification at 808, 980, 1064, and 1550 nm wavelengths, significantly boosting UCNP optical signals while accommodating diverse sensitizer doping configurations. Beyond conventional refractive-index-induced spectral shifts, a linear correlation between local field strength and refractive index is revealed, enabling a dual-mode mechanism that concurrently links spectral shifts and luminescence intensity to refractive index variations. Demonstrating broad compatibility with UCNP with different dopant ions, this design advances sensing technology through synergistic spectral-intensity modulation, with applications spanning diabetes detection, tunable nanolight sources, and high-sensitivity environmental monitoring systems.

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基于多层金纳米片嵌入UCNP非均质超材料的双模折射率传感器

高精度折射率传感器是医疗诊断、环境监测和生物分析的关键。本研究通过金纳米盘- ucnp非均质超材料，提出了一种集光谱位移检测和荧光增强于一体的双模折射率传感器。通过优化结构参数（如金属层数、纳米盘半径），实现了可调谐的复用带吸收。该平台在808、980、1064和1550 nm波长处表现出强大的本地场放大，在适应不同敏化剂掺杂配置的同时，显著增强了UCNP光信号。除了传统的折射率引起的光谱位移之外，本场强和折射率之间存在线性相关性，从而实现了将光谱位移和发光强度与折射率变化同时联系起来的双模机制。该设计展示了与不同掺杂离子的UCNP的广泛兼容性，通过协同光谱强度调制推进传感技术，应用范围涵盖糖尿病检测、可调纳米光源和高灵敏度环境监测系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems