A wide bandgap plasmonic Bragg reflector
A wide bandgap plasmonic Bragg reflector
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宽带隙等离子体布拉格反射器
DOI：
10.1364/oe.16.004888
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发表时间：
2008-03-31
期刊：
影响因子：
3.8
通讯作者：
Wen, Shuanghcun
中科院分区：
文献类型：
--
作者：
Liu, Jian-Qiang;Wang, Ling-Ling;Wen, Shuanghcun
对光学性能更优异的表面等离子体激元(SPPs)布拉格反射器进行了数值研究。通过在金属-绝缘体-金属(MIM)光波导的两面引入有限列周期沟槽，实现了产生光子带隙(PBG)的有效折射率的周期性变化。在窄缝宽的波导中插入折射率较高的介质材料，进一步加宽了它的宽度。时域有限差分(FDTD)模拟证实了带隙的加宽。此外，通过打破我们所提出的结构的周期性，引入了SPP纳米腔。(C)2008年美国光学学会。
Surface plasmon polaritons (SPPs) Bragg reflector with more excellent optical properties are investigated numerically. By introducing a finite array of periodic grooves on the two surfaces of metal-insulator-metal (MIM) waveguide, we fulfill the periodical changes of effective refractive index, which leads to the photonic band gap (PBG). And it has been further widened by inserting a dielectric material with higher refractive index in the waveguide with narrow slit width. Finite difference time domain (FDTD) simulation confirms the widened bandgap. In addition, a SPP nanocavity is introduced by breaking the periodicity of our proposed structure. (C) 2008 Optical Society of America.