Ultra-Compact Effective Localized Surface Plasmonic Sensor for Permittivity Measurement of Aqueous Ethanol Solution With High Sensitivity
| Autor: | Yaru Yu, Qi Jiang, Yaoran Zhang, Liangliang Liu, Yufan Zhao, Zhuo Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Coupling
Permittivity Materials science Field (physics) business.industry Physics::Optics Resonance Condensed Matter::Soft Condensed Matter Optoelectronics Equivalent circuit Sensitivity (control systems) Physics::Chemical Physics Electrical and Electronic Engineering business Instrumentation Plasmon Localized surface plasmon |
| Zdroj: | IEEE Transactions on Instrumentation and Measurement. 70:1-9 |
| ISSN: | 1557-9662 0018-9456 |
| DOI: | 10.1109/tim.2021.3092783 |
| Popis: | In this article, we propose an ultra-compact microwave sensor based on an effective localized surface plasmon (ELSP) resonance for complex permittivity measurement of aqueous ethanol solution. The sensitivity of the sensor is dramatically enhanced thanks to the strong electromagnetic (EM) field coupling and enhancement of the ELSP in a deep-subwavelength scale. An equivalent circuit model of the sensor is established for analyzing the sensing mechanism, and the complex permittivity of the aqueous ethanol solution under test is extracted from the S-parameter through an empirical model. For demonstration, we successfully predict the complex permittivity of aqueous ethanol solution with an ethanol concentration of 0%–90% through simulations and experiments. This ELSP-based sensor features an ultra-compact size of $0.008\lambda _{0}^{2}$ and high sensitivity of 0.57% and can find many applications (liquid permittivity measurement, liquid testing, and so on) in highly integrated systems. |
| Databáze: | OpenAIRE |
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