Optical Transmission through Subwavelength Metallic Slit Arrays

摘要：

Mid-Infrared radiative property of submicron silver slit arrays have been numerically studied with the finite difference time domain method. The slit width varies from 50 nm to 300 nm and a square feature may attach at either or both slit sides. Although the side length of features is one or two orders of magnitude shorter than the wavelength, the attached nanoscale features can modify the transmittance significantly. The transmittance has also been furtherly investigated in detail by looking into electromagnetic fields and Poynting vectors of selected slit geometries. The investigation results show that such change can be attributed to the cavity resonance effect inside the slit arrays. The work is of great importance to the wavelength-selective devices design in optical devices and thermal applications field.

关键词： finite difference time domain method radiative property nanoscale features silver slit arrays

作者: Aihua Wang Jiuju Cai Yubin Chen

作者单位: School of Materials and Metallurgy,Northeastern University,Shenyang 110819,China Department of Mechanical Engineering,National Cheng Kung University,Tainan City,701,Taiwan

会议类型: 国际会议

会议名称: the 2011 International Conference on Key Engineering Materials(ICKEM 2011)(2011关键工程材料国际会议)

会议地点: 三亚

会议语种:英文

页码: 623-627

在线出版日期: 2011-03-25（万方平台首次上网日期，不代表论文的发表时间）