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Terahertz Plasmonic Microcavity with High Quality Factor and Ultrasmall Mode Volume |
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| Authors: | Zhen Gao Linfang Shen Xiaodong Zheng Jin-Jei Wu Tzong-Jer Yang Dongxiao Yang |
| Institution: | 1. Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, Zhejiang Province, 310027, People’s Republic of China 2. Department of Optical Engineering, Zhejiang University, Hangzhou, Zhejiang Province, 310027, People’s Republic of China 3. Department of Electrical Engineering, Chung Hua University, HsinChu, 30012, Taiwan, Republic of China |
| Abstract: | In this paper, the characteristics of a novel terahertz plasmonic microcavity consisting of a circular hole and a coaxial (metallic) cylindrical core machined on a planar metal surface is theoretically investigated. It is shown that such a structure can sustain plasmonic modes, whose resonant wavelengths are much larger than the hole diameter and fields tightly localized within the cavity. For this cavity, both high quality factor and ultrasmall mode volume can be achieved in the terahertz range. As this type of microcavity is particularly compatible with planar technology, it has promising applications in the miniaturization and integration of terahertz optical components. |
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