Wavelength-multiplexing phase-sensitive surface plasmon imaging sensor.
Wavelength-multiplexing phase-sensitive surface plasmon imaging sensor.
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DOI：
10.1364/ol.38.001370
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发表时间：
2013-05
期刊：
影响因子：
3.6
通讯作者：
Yonghong Shao;Yan Li;D. Gu;Kai Zhang;J. Qu;Jianan He;Xuejin Li;Shu-yuen Wu;H. Ho;M. Somekh;H. Niu
中科院分区：
文献类型：
--
作者：
Yonghong Shao;Yan Li;D. Gu;Kai Zhang;J. Qu;Jianan He;Xuejin Li;Shu-yuen Wu;H. Ho;M. Somekh;H. Niu
报道了一种具有宽动态探测范围和微阵列性能的波长复用相敏表面等离子体共振（SPR）成像传感器。相位检测是通过在信号波束内的s极化和p极化之间进行自干涉来完成的。采用液晶可调滤波器从白光源中依次选择SPR激发波长。这种波长复用方法可以在宽波长范围内快速检测传感器的SPR相位响应，从而覆盖SPR倾角内的任何感兴趣区域，从而始终保持最高灵敏度。相敏方法对于成像SPR传感应用尤其重要，因为它对强度信噪比的要求不那么严格，这也意味着可以使用非冷却的中等分辨率模数转换成像设备。实验结果表明，分辨率为2.7×10(-7) RIU，动态范围为0.0138 RIU。
A wavelength-multiplexing phase-sensitive surface plasmon resonance (SPR) imaging sensor offering wide dynamic detection range and microarray capability is reported. Phase detection is accomplished by performing self-interference between the s- and p- polarizations within the signal beam. A liquid crystal tunable filter is used to sequentially select the SPR excitation wavelength from a white light source. This wavelength-multiplexing approach enables fast detection of the sensor's SPR phase response over a wide range of wavelengths, thereby covering literally any regions of interest within the SPR dip and thus maintaining the highest sensitivity point at all times. The phase-sensitive approach is particularly important for imaging SPR sensing applications because of its less stringent requirements for intensity signal-to-noise ratio, which also means the possibility of using uncooled modest resolution analog-to-digital conversion imaging devices. Experimental results demonstrate a resolution of 2.7×10(-7) RIU with a dynamic range of 0.0138 RIU.