Nanoprecision algorithm for surface plasmon resonance determination from images with low contrast for improved sensor resolution
Nanoprecision algorithm for surface plasmon resonance determination from images with low contrast for improved sensor resolution
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DOI：
10.1117/1.3598138
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发表时间：
2011-06-23
影响因子：
1.5
通讯作者：
Abdulhalim, Ibrahim
中科院分区：
文献类型：
--
作者：
Karabchevsky, Alina;Karabchevsky, Serge;Abdulhalim, Ibrahim
设计了一种基于Radon变换的二维表面等离子体成像前向投影算法，以在确定表面等离子体信号时实现纳米级精度。使用选定频率的发散激光束来克服众所周知的 Kretschmann 配置中的角度扫描。实现了分辨率提高的多通道传感。该技术还用于通过金属表面顶部 40 nm 厚的 SiO2 图案层来确定传感器的横向分辨率。作为表面等离子体共振信号检测器，所提出的 Radon 变换算法的使用在单通道和多通道传感的情况下显示出纳米精度。该方法还提供信号的滤波输出，无需任何额外的修改，因此对噪声不敏感。 (C) 2011 年光电仪器工程师协会 (SPIE)。 [DOI：10.1117/1.3598138]
A forward-projection algorithm based on Radon transform for two-dimensional surface plasmon imaging was devised to achieve nanoscale precision in determining the surface plasmon signal. A diverging laser beam at the chosen frequency was used to overcome the angular scanning in the well-known Kretschmann configuration. Multichannel sensingwith improved resolution was realized. The technique was also used to find the lateral resolution of the sensor using a patterned layer of 40-nm thick SiO2 layer on top of the metallic surface. As a surface plasmon resonance signal detector, the use of the proposed Radon transform algorithm shows nanoprecision accuracy in cases of single and multichannel sensing. The method also provides the filtered output of the signal without any extra modification and therefore, it is nonsensitive to noise. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3598138]