Xiao Xiao, Jinbo Wu, Sasagawa Yuki, Miyamaru Fumiaki, Zhang Mengying, Takeda Mitsuo W, Qiu Chunyin, Wen Weijia, Sheng Ping
Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
Opt Express. 2010 Aug 30;18(18):18558-64. doi: 10.1364/OE.18.018558.
We have observed resonant terahertz transmission peaks in samples comprising perforated periodic hole array in a metal film, covered with a high dielectric substrate. These resonant transmissions arise from the interplay between waveguide modes in dielectric substrate and the periodic hole array in the metal film. Finite difference time domain (FDTD) simulations show good agreement with the data, in support of the proposed mechanism. Inducing additional resonant transmissions using guided modes can lead to the ease in tuning the transmission peak frequencies that are potentially useful to terahertz (THz) bio-sensing.
我们在由金属薄膜中的穿孔周期性孔阵列组成、并覆盖有高介电常数衬底的样品中观察到了共振太赫兹传输峰。这些共振传输源于介电衬底中的波导模式与金属薄膜中的周期性孔阵列之间的相互作用。时域有限差分（FDTD）模拟结果与数据吻合良好，支持了所提出的机制。利用导模诱导额外的共振传输可以使传输峰频率的调谐变得容易，这对太赫兹（THz）生物传感可能是有用的。
