In this paper, a new mode of deep perforated sub-wavelength metallic hole arrays in hexagonal lattice is presented. The transmission spectrum is obtained with Finite-difference time-domain (FDTD) and measured with Fourier infrared spectrometer. In the resonance peak scope, the Electric-field intensity is similar to 80 times larger than that of the incident wave at near field. The resonance of this structure can enhance the near-field intensity and improve the absorption efficiency of photodetector.
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