Plasmonic biosensor with annular aperture array integrated on a resonant cavity LED
Plasmonic biosensor with annular aperture array integrated on a resonant cavity LED
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DOI：
10.1016/j.optcom.2023.129336
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发表时间：
2023-02
影响因子：
2.4
通讯作者：
Langsheng Wang;Guoxuan Wang;Ke Yang;Weina Zhang;Wenjie Liu
中科院分区：
文献类型：
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作者：
Langsheng Wang;Guoxuan Wang;Ke Yang;Weina Zhang;Wenjie Liu
在本文中，我们提出了一个强度敏感的紧凑型等离子体传感器集成环形孔径阵列与谐振腔LED（RCLED）。非寻常光透射（EOT）峰来源于表面等离子体激元（SPP）和局域表面等离子体共振（LSPR）之间的相互耦合，利用线宽较窄的EOT峰进行强度调制。模拟结果表明，通过优化环形孔径阵列的谐振波长使其与RCLED的发射波长相匹配，相对强度变化达到97%，作为覆盖在传感器上的蛋白质分子层，强度灵敏度为9744%/RIU。
In this paper, we propose an intensity-sensitive compact plasmonic sensor by integrating an annular aperture array with a resonant cavity LED (RCLED). The extraordinary optical transmission (EOT) peak originates from the mutual coupling between surface plasmon polariton (SPP) and Localized surface plasmon resonance (LSPR), which utilizes the EOT peak with narrower linewidth for intensity modulation. Simulation results show that by optimizing the resonant wavelength of the annular aperture array to match the emission wavelength of the RCLEDs, the relative intensity change reaches 97%, and the intensity sensitivity is 9744 %/RIU as a protein molecular layer covered on the sensor.