Quarter-mode spoof plasmonic resonator for a microfluidic chemical sensor

Shao Rong Lin; Zhou Yong Jin; Yang Liu

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Quarter-mode spoof plasmonic resonator for a microfluidic chemical sensor

机译：微流体化学传感器的四分之一模型劣质等离子体谐振器

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In this paper, we propose a microfluidic chemical sensor based on quarter-mode spoof plasmonic resonators with more compact overall size and higher sensitivity. First, a microfluidic channel engraved on polydimethylsiloxane is aligned to the upper part of the spoof plasmonic metal-insulator-metal (MIM) ring resonator where the strongest electric fields are observed at resonance. Although a resonant frequency shift of 270 MHz has been observed when the microfluidic channel is filled with pure ethanol, there is no resonant frequency shift when the ethanol concentration is changed from 40% to 60%. Then the spoof localized surface plasmons modes on the quarter corrugated MIM ring are analyzed, and a microfluidic sensor based on the quarter-mode spoof plasmonic resonator has been proposed. The proposed microfluidic sensor requires a very small amount (3.9 mu L) of liquid for testing. After infilling the microfluidic channel with pure ethanol, the resonant frequency shift of 940 MHz has been observed on account of the dielectric changes. It is observed that the resonant frequency of the proposed sensor shifts from 5.07 to 6.62 GHz when the ethanol concentration is varied from 10% to 90%. It has been demonstrated that such quarter-mode spoof plasmonic resonator is well suited to a highly sensitive and compact microfluidic chemical sensor. (C) 2018 Optical Society of America

机译：在本文中，我们提出了一种基于四分之一模式劣质等级谐振器的微流体化学传感器，具有更紧凑的整体尺寸和更高的灵敏度。首先，在聚二甲基硅氧烷上雕刻的微流体通道与恶劣等离子体金属 - 绝缘体 - 绝缘体 - 金属（MIM）环谐振器的上部对齐，其中在共振时观察到最强的电场。尽管当填充纯乙醇的微流体通道时已经观察到270MHz的共振频率偏移，但是当乙醇浓度从40％变为60％时，没有共振频移。然后，分析了四分之一波纹MIM环上的欺骗局部表面等离子体模式，并提出了基于四分之一模式恶搞等离子体谐振器的微流体传感器。所提出的微流体传感器需要非常少量的量（3.9μl）液体进行测试。在用纯乙醇排放微流体通道后，由于电介质改变，已经观察到940MHz的共振频率偏移。观察到，当乙醇浓度从10％变化到90％时，所提出的传感器的谐振频率从5.07转移到6.62GHz。已经证明，这种四分之一模式恶搞等离子体谐振器非常适合于高灵敏度和紧凑的微流体化学传感器。（c）2018年光学学会

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《Applied optics》 |2018年第28期|共6页
作者
Shao Rong Lin; Zhou Yong Jin; Yang Liu;
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Shanghai Univ Shanghai Inst Adv Commun &

Data Sci Joint Int Res Lab Specialty Fiber Opt &

Adv Commu Key Lab Specialty Fiber Opt &

Opt Access Networks Shanghai 200444 Peoples R China;

Shanghai Univ Shanghai Inst Adv Commun &

Data Sci Joint Int Res Lab Specialty Fiber Opt &

Adv Commu Key Lab Specialty Fiber Opt &

Opt Access Networks Shanghai 200444 Peoples R China;

Shanghai Univ Shanghai Inst Adv Commun &

Data Sci Joint Int Res Lab Specialty Fiber Opt &

Adv Commu Key Lab Specialty Fiber Opt &

Opt Access Networks Shanghai 200444 Peoples R China;

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Quarter-mode spoof plasmonic resonator for a microfluidic chemical sensor

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