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采用电子束直写光刻和离子束刻蚀的方法,将具有不同周期的纳米金柱阵列制备于透明的石英衬底上.通过对样品的透射光谱进行采集和分析可知,改变纳米柱阵列周期可以实现在红外波段对局域表面等离子共振的精密调节.实验结果表明,在透射谱中共振谷的波长随着周期的增大而红移,且红移的距离可以通过控制纳米柱阵列的周期进行调制.理论模拟结果与实验结果在一定程度上相吻合.此外,还对不同高度的纳米柱阵列的透射谱进行比较和分析.更进一步,将制备的纳米银柱阵列和傅里叶变换光谱仪的ATR附件相耦合,有效增强了葡萄糖溶液的吸收谱强度.可见周期结构的纳米柱阵列可以有效增大样品表面的近场场强,在信号传感和检测等领域有着广泛的应用前景.
Using electron beam direct writing lithography and ion beam etching method, nanogold arrays with different periods are prepared on a transparent quartz substrate. By collecting and analyzing the transmission spectra of the samples, it can be seen that changing the period of the nanocolumn array Which can realize the fine adjustment of local surface plasmon resonance in the infrared band.The experimental results show that the wavelength of the resonance valley shifts red with the increase of the period in the transmission spectrum and the redshift distance can be controlled by controlling the period of the nanocolumn array The theoretical simulation results are consistent with the experimental results to a certain extent.In addition, the transmission spectra of nano-column arrays with different heights are compared and analyzed.Furthermore, the prepared nano-silver column arrays and Fourier transform spectrometer Of the ATR attachment, effectively enhancing the absorption spectrum intensity of the glucose solution.It can be seen that the nano-column array with periodic structure can effectively increase the near-field strength of the sample surface and has wide application prospect in the fields of signal sensing and detection.