文章基本信息

标题：Optically tunable split-ring resonators controlled lead sulfide quantum dots modulator for wide THz radiation
本地全文：下载
作者：Xu Yifei ; Song Qi ; Li Enen 等
期刊名称：Nanophotonics
印刷版ISSN：2192-8606
电子版ISSN：2192-8614
出版年度：2022
卷号：11
期号：8
页码：1619-1628
DOI：10.1515/nanoph-2021-0808
语种：English
出版社：Walter de Gruyter GmbH
摘要：It is particularly appealing for efficient active terahertz (THz) modulators using photonic structures to enhance light–matter interaction. Here, an optical controlled THz modulator is proposed that combines lead sulfide (PbS) quantum dots with subwavelength metallic split-ring resonators (SRRs) for providing field enhancement. The modulation depth reaches 60.3%, which is approximately 3 times larger than the PbS quantum dots film without SRRs (as reference) in the frequency range of 0.1–1.1 THz. Such significant enhanced THz modulation is mainly due to the local THz field enhancement caused by the SRRs, which is consistent with the simulation result.