The bright–bright and bright–dark mode coupling-based planar metamaterial for plasmonic EIT-like effect

Yu, Wei; Meng, Hongyun; Chen, Zhangjie; Li, Xianping; Zhang, Xing; Wang, Faqiang; Wei, Zhongchao; Tan, Chunhua; Huang, Xuguang; Li, Shuti

doi:10.1016/j.optcom.2017.12.084

Cited by 39 publications

(19 citation statements)

References 36 publications

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“…The mode hybridization of the TSRR and the C shaped SRRs, and subsequent frequency detuning leads to the two transparency windows. Hence, it can be inferred that strong near field coupling between the bright -bright modes leads to the multiband EIT windows peaking at P1 and P2 respectively 13 , 14 .…”

Section: Resultsmentioning

confidence: 99%

Multiband transparency effect induced by toroidal excitation in a strongly coupled planar terahertz metamaterial

Bhattacharya

Sarkar

Sharma

et al. 2021

Sci Rep

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The multiband transparency effect in terahertz (THz) domain has intrigued the scientific community due to its significance in developing THz multiband devices. In this article, we have proposed a planar metamaterial geometry comprised of a toroidal split ring resonator (TSRR) flanked by two asymmetric C resonators. The proposed geometry results in multi-band transparency windows in the THz region via strong near field coupling of the toroidal excitation with the dipolar C-resonators of the meta molecule. The geometry displays dominant toroidal excitation as demonstrated by a multipolar analysis of scattered radiation. High Q factor resonances of the metamaterial configuration is reported which can find significance in sensing applications. We report the frequency modulation of transparency windows by changing the separation between TSRR and the C resonators. The numerically simulated findings have been interpreted and validated using an equivalent theoretical model based upon three coupled oscillators system. Such modeling of toroidal resonances may be utilized in future studies on toroidal excitation based EIT responses in metamaterials. Our study has the potential to impact the development of terahertz photonic components useful in building next generation devices.

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Section: Resultsmentioning

confidence: 99%

Multiband transparency effect induced by toroidal excitation in a strongly coupled planar terahertz metamaterial

Bhattacharya

Sarkar

Sharma

et al. 2021

Sci Rep

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“…For the TM polarization, there is only one dip at f4 = 353 THz. Based on the distribution of the electric field on the bottom layer, the radiation of the U-shaped resonator is apparently working as a bright mode [21,27,28].…”

Section: Simulations and Resultsmentioning

confidence: 99%

Design of Broad Stopband Filters Based on Multilayer Electromagnetically Induced Transparency Metamaterial Structures

Liu

Shah

et al. 2019

Materials

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Broad stopband filters are proposed, based on multilayer electromagnetically induced transparency (EIT) metamaterial structures. The single EIT metamaterial consists of a U-shaped resonator and a strip on a polyimide substrate. The EIT-like spectral feature is firstly utilized to achieve stopband filters by properly coupling two layers of EIT structure. Influences of different rotation angles on the transmission properties of the two-layer EIT structure are investigated. It is found the wider low-transmission band can be obtained for the Transverse Magnetic (TM) polarization when the two EIT metal structures are vertical to each other. Furthermore, the bandwidth of the stopband can be controlled by increasing layers of the EIT structures with the proper architectural design. The design using a coupling effect of multi EIT-like resonances in the metamaterial would provide a new method for broad stopband filters in highly integrated optical circuits.

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“…It is seen that the two L shapes are excited strongly by the incident field at f 1 , and an out-phase resonance appears. Therefore, the high transmission peak appears at f 1 = 0.4465 THz [35] . For the EIT peak at f 2 = 0.639 THz, the destructive interference between scattering electromagnetic fields of the two resonators occurs, and most energy is located at one arm of each resonator.…”

Section: Dual-band Eit and Linear To Circular Polarization Convertermentioning

confidence: 95%

A VO2 film-based multifunctional metasurface in the terahertz band

Liu

Lan

et al. 2022

中国光学快报

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The bright–bright and bright–dark mode coupling-based planar metamaterial for plasmonic EIT-like effect

Cited by 39 publications

References 36 publications

Multiband transparency effect induced by toroidal excitation in a strongly coupled planar terahertz metamaterial

Multiband transparency effect induced by toroidal excitation in a strongly coupled planar terahertz metamaterial

Design of Broad Stopband Filters Based on Multilayer Electromagnetically Induced Transparency Metamaterial Structures

A VO2 film-based multifunctional metasurface in the terahertz band

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