Dynamically tunable metamaterial device for bidirectional optical switching in terahertz

被引：0
作者：
Gao, Guangbo [1 ]
Ma, Shilin [1 ,2 ]
Mi, Xianwu [1 ,2 ]
Shan, Xinyu [1 ]
机构：
[1] Jishou Univ, Coll Phys & Electromech Engn, Xiangxi 416000, Jishou, Peoples R China
[2] Huaihua Univ, Sch Phys Elect & Intelligent Mfg, Key Lab Intelligent Control Technol Wuling Mt Ecol, Huaihua 418008, Hunan, Peoples R China
来源：
JOURNAL OF OPTICS | 2025年 / 27卷 / 07期
基金：
中国国家自然科学基金;
关键词：
dynamically switchable; metamaterial device; bidirectional optical switch; BROAD-BAND; DUAL-BAND; INTEGRATED METAMATERIAL; STRONTIUM-TITANATE; PERFECT ABSORBER; DESIGN; ABSORPTION;
D O I：
10.1088/2040-8986/adebff
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A dynamically tunable metamaterial device (DTMD) with switchable functionality between broadband transmission and absorption is proposed, utilizing vanadium oxide (VO2) and graphene. By varying the conductivity of VO2 from 0 S m-1 to 200 000 S m-1, the device enables dynamic switching between broadband transmission and absorption modes. This device achieves broadband absorption exceeding 90% with an absorption bandwidth of 5.64 THz, ranging from 2.42 THz to 8.06 THz. In transmission mode, broadband transmission rates above 90% are achieved across the 2.28-8.98 THz spectra. More importantly, the proposed device operates as a bidirectional optical switch, demonstrating a maximum modulation depth of 99.99%, as well as polarization-independent operation and wideband characteristics. This DTMD holds potentialities for terahertz optoelectronic applications, including optical switches, modulators, and broadband absorbers, etc.
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页数：8
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