Yang Jin-Kyu, Kee Chul-Sik, Lee Joong Wook
Department of Optical Engineering, Kongju National University, Kongju 314-701, Korea.
Opt Express. 2011 Oct 10;19(21):20199-204. doi: 10.1364/OE.19.020199.
We report on the three-dimensional subwavelength confinement of the electromagnetic waves at a coupled metallic slit structure beyond diffraction limit in terahertz region. Lateral confinement behavior, leading to the three-dimensional confinement, is caused by a strong funneling effect of the light which occurs at the intersection of slits with a sharp metal geometry. Tunability of the resonant frequency and the position of the light confinement is achieved by controlling the slit length and the position of the intersection of slits, respectively.
我们报道了太赫兹波段耦合金属狭缝结构中电磁波在衍射极限之外的三维亚波长限制。导致三维限制的横向限制行为是由光在具有尖锐金属几何形状的狭缝交点处发生的强烈漏斗效应引起的。分别通过控制狭缝长度和狭缝交点位置来实现共振频率和光限制位置的可调性。
