Tunable optical transmission through gold hole arrays with converging and diverging shaped channels |
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| Authors: | Suxia Xie Hongjian Li Shaoli Fu Haiqing Xu Xin Zhou Zhimin Liu |
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| Affiliation: | 1. College of Physics Science and Technology, Central South University, Changsha 410083, PR China;2. College of Materials Science and Engineering, Central South University, Changsha 410083, PR China |
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| Abstract: | We investigate the extraordinary light transmission through gold hole arrays with converging–diverging, diverging–converging, and converging shaped channels by using finite-difference time-domain (FDTD) method. We find that the resonance wavelength and intensity of each type of hole array are sensitive to the aperture size and unit number of the converging or diverging shape unit in the channels. We show that transmission behaviors are noticeably different for the gold hole arrays with such three different types of channel shapes. The resonant characteristics of the gold hole arrays with shaped channels have a number of important device applications, including filters, modulators and sensors. |
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