Ultra-narrowband and highly-directional THz thermal emitters based on the bound state in the continuum
Ultra-narrowband and highly-directional THz thermal emitters based on the bound state in the continuum
复制标题
基于连续谱束缚态的超窄带和高方向性太赫兹热发射器
DOI：
10.1515/nanoph-2021-0380
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发表时间：
2021-10
期刊：
影响因子：
7.5
通讯作者：
Han Zhanghua
中科院分区：
文献类型：
--
作者：
Sun Kaili;Zhao Zongshan;Cai Yangjian;Levy Uriel;Han Zhanghua
Abstract The development of novel and cost-effective THz emitters, with properties superior to current THz sources, is an active and important field of research. In this work, we propose and numerically demonstrate a simple yet effective approach of realizing terahertz sources working in continuous-wave form, by incorporating the new physics of bound state in the continuum (BIC) into thermal emitters. By deliberately designing the structure of slotted disk array made of high-resistivity silicon on top of a low index dielectric buffer layer supported by a conducting substrate, a quasi-BIC mode with ultra-high quality factor (∼104) can be supported. Our results reveal that the structure can operate as an efficient terahertz thermal emitter with near-unity emissivity and ultranarrow bandwidth. For example, an emitter working at 1.3914 THz with an ultranarrow linewidth less than 130 MHz, which is roughly 4 orders of magnitude smaller than that obtained from a metallic metamaterial-based thermal emitter, is shown. In addition to its high monochromaticity, this novel emitter has additional important advantages including high directionality and linear polarization, which makes it a promising candidate as the new generation of THz sources. It holds a great potential for practical applications where high spectral resolving capability is required.
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影响因子：
--
作者：
S. Edeagu
通讯作者：
S. Edeagu
DOI：
10.1109/leos.1994.586628
发表时间：
1994-10
期刊：
Proceedings of LEOS'94
影响因子：
--
作者：
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通讯作者：
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DOI：
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发表时间：
2011-02
期刊：
Journal of Infrared, Millimeter, and Terahertz Waves
影响因子：
--
作者：
N. Vinokurov
通讯作者：
N. Vinokurov
影响因子：
56.9
作者：
Chevalier, Paul;Amirzhan, Arman;Everitt, Henry O.
通讯作者：
Everitt, Henry O.
影响因子：
1.9
作者：
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通讯作者：
Zimdars, D