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Tunable ultra-narrowband multichannel filter based on plasmon photonic crystal and multimode cavity-coupled system

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成果类型:
期刊论文
作者:
CuixiuXiong;HongjianLi;HuiXu;MingzhuoZhao;BaihuiZhang;ChaoLiu;KuanWu
作者机构:
School of Physics and Electronics, Central South University, Changsha 410083, China
College of Information and Electronic Engineering, Hunan City University, Yiyang 413000, China
语种:
中文
关键词:
Metal–dielectric–metal waveguide;Plasmon photonic crystal;Plasmon-induced transparency;Tunable ultra-narrowband multichannel filter
期刊:
Optics Communications
ISSN:
0030-4018
年:
2020
卷:
458
期:
Volume 458
页码:
124782-
机构署名:
本校为其他机构
院系归属:
信息与电子工程学院
摘要:
We introduce the concept of the photonic crystal (PC) into the waveguide system and propose a metal–dielectric–metal (MDM) waveguide system coupled with three periodic stubs and a multimode cavity. This system can realize multiple ultra-narrow plasmon-induced transparency (PIT) effects with a minimum linewidth of about 4 nm. These PIT peaks exhibit tunable evolution characteristics of two groups. The wavelengths and linewidths of one group of PIT peaks in the transmission spectra only can be changed slightly, while the wavelengths of another group of PIT peaks can be changed significantly by adjusting one of the geometric parameters of the cavity. This research may open up new design ideas for ultra-narrowband multichannel filters and switches.

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