Experimental measurement of photonic/plasmonic crystal dispersion, applied to the investigation of surface plasmon dispersion for SERS sensing applications

Experimental measurement of photonic/plasmonic crystal dispersion, applied to the investigation of surface plasmon dispersion for SERS sensing applications
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光子/等离子体晶体色散的实验测量，应用于 SERS 传感应用的表面等离子体色散研究

DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Martin D. B. Charlton
Martin D. B. Charlton
中科院分区：
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文献类型：
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作者：
M. Firdaus A. Muttalib;S. Oo;Martin D. B. Charlton

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在本文中，我们描述了一种实验测量程序和角度相关分析的自动化系统 与介电光子晶体或表面等离子体激元色散相关的色散 纳米结构金属介电表面。这一全自动系统利用了宽带光谱反射法 获取偏振分辨数据的方法。角度色散是通过用白光照亮样品来绘制的 激光波长范围从450 nm到1800 nm。然后，一个可移动的光纤探头收集反射信号。然后是反射率下降 对应于部分耦合的布洛赫模。将该测量系统应用于等离子体激元的研究 金属涂层方锥体SERS传感器周期阵列的离散性。然后进行比较，以 用基于严格耦合波分析(RCWA)的RSOFT DiffractMOD进行了计算模拟。在精确的波长范围内，测量的实验色散图案与模拟结果非常接近 (400 nm至900 nm)。
In this paper we describe an experimental measurement procedure and automated system for analysis of angle dependent dispersion associated with dielectric photonic crystals or surface Plasmon polariton dispersion associated with nanostructured metallo-dielectric surfaces. This fully automated system utilizes a broadband spectroscopic reflectometry method to acquire polarization resolved data. Angular dispersion is mapped by illuminating a sample with a white light laser ranging from 450nm to 1800nm. A movable fiber probe then collects the reflected signal. Dips in reflectivity then correspond to partially coupled Bloch modes. The measurement system was applied to the investigation of Plasmon dispersion of periodic arrays of metal coated square pyramids SERS sensors. Comparisons are then made to computational simulations derived using RSOFT DiffractMOD based on Rigorous Coupled Wave Analysis (RCWA). Measured experimental dispersion patterns are found to closely match simulation in the exact frame of wavelength (400nm to 900nm).