利用太赫兹时域光谱(THz-TDS)系统,在5-300K温区下测量了在厚度约200nm的金属Nb薄膜刻蚀的亚波长圆孔阵列的异常THz波透射情况.实验结果表明,在0.3-2THz波段,具有亚波长孔阵结构的金属Nb薄膜的异常透射现象波谱的峰位置与CST(computer simulation technology)软件仿真模拟的结果一致,峰值随温度降低有逐渐增强的趋势.
Using terahertz time domain spectroscopy(THz-TDS),THz transmission spectrum of the array with sub-wavelength apertures on the Nb thin film has been studied in the temperature range of 5—300 K.The extraordinary transmission is observed and the peak positions are in agreement with the computer simulation technology simulation results.The transmission amplitude increases with the decreasing temperature.