Tuning the hybridization bandgap by meta-molecules with in-unit interaction

Chen, Yongqiang; Li, Yunhui; Wu, Qian; Jiang, Haitao; Zhang, Yewen; Chen, Hong

doi:10.1063/1.4930038

Cited by 3 publications

(2 citation statements)

References 36 publications

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“…In spontaneous emission cancellation (SEC) analogue, the SEC-like effect is achieved in a meta-molecule by properly tailoring the destructive interference of two different emitting meta-atoms [31,32]. It is noteworthy that, in contrast to the EIT analogue, the SEC-like effect realized by meta-molecules has an extremely deep stop-band in the transmission spectrum [33][34][35]. Up to now, a large number of researches have confirmed that it is feasible to realize EM modulators in actively controlled EITlike meta-molecules [36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

An electromagnetic modulator based on electrically controllable meta-molecule analogue to spontaneous emission cancellation

Gao

Jiang²,

Chen³

et al. 2023

Front. Phys.

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In this article, we present a miniaturized electromagnetic modulator based on electrically controllable spontaneous-emission-cancellation-like (SEC-like) effect in meta-molecule. The SEC-like meta-molecule with in-unit destructive interference interaction is constructed by two detuned side-coupled resonators based on zero-index-metamaterial The subwavelength ZIM-based resonators, regarding as meta-atoms, are arranged symmetrically in a cut microstrip. A diode serving as an adjustable resistor is embedded in the gap of microstrip to inductively tune the interference of two ZIM-based meta-atoms. Numerical simulations indicate that the remarkable modulation on the SEC-like spectrum can be realized by changing the resistance from 9,000 Ω (unconnected) to 10 Ω (connected). Microwave experiments validate the electromagnetic modulation in three narrow bands on the SEC-like spectrum, and a peak modulation contrast of 52.1 dB on the transmission at 2.59 GHz is achieved through electric biasing. The results in this work may pave the way for our design to be applied in new integrated active devices and applications.

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Section: Introductionmentioning

confidence: 99%

An electromagnetic modulator based on electrically controllable meta-molecule analogue to spontaneous emission cancellation

Gao

Jiang²,

Chen³

et al. 2023

Front. Phys.

Self Cite

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show abstract

“…To date, controllably coupling metamaterials in the manner required to mimic vdW heterostructures remains challenging, despite several promising layered designs [18][19][20] . Meanwhile, coupling-induced hybridization effects were investigated in systems of neighboring acoustic resonators [21][22][23] , but whether they can be used to imitate vdW heterostructures is an open question.…”

Section: Introductionmentioning

confidence: 99%

van der Waals metamaterials

et al. 2020

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Van der Waals heterostructures are a fertile frontier for discovering emergent phenomena in condensed matter systems. They are constructed by stacking elements of a large library of twodimensional materials, which couple together through van der Waals interactions. However, the number of possible combinations within this library is staggering, and fully exploring their potential is a daunting task. Here we introduce van der Waals metamaterials to rapidly prototype and screen their quantum counterparts. These layered metamaterials are designed to reshape the flow of ultrasound to mimic electron motion. In particular, we show how to construct analogues of all stacking configurations of bilayer and trilayer graphene through the use of interlayer membranes that emulate van der Waals interactions. By changing the membrane's density and thickness, we reach coupling regimes far beyond that of conventional graphene. We anticipate that van der Waals metamaterials will explore, extend, and inform future electronic devices. Equally, they allow the transfer of useful electronic behavior to acoustic systems, such as flat bands in magic-angle twisted bilayer graphene, which may aid the development of super-resolution ultrasound imagers.

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Broadband electromagnetically induced transparency in metamaterials based on hybridization bandgap

et al. 2020

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We present a broadband electromagnetically induced transparency-like (EIT-like) effect in a microwave waveguide system by employing a bright meta-atom side-coupled to a linear chain of dark meta-atoms with a hybridization bandgap (HBG). We find that such a configuration can generate a wideband EIT response of up to 145 MHz, covering 23.7% of the central frequency. We also show that the EIT bandwidth can even extend to 211 MHz by further broadening the HBG while keeping the device volume unchanged. We emphasize that the EIT-like meta-molecules are subwavelength structures with only about one tenth of the operating wavelength. Our findings will be beneficial for realizing compact broadband slow light components in communication systems.

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Tuning the hybridization bandgap by meta-molecules with in-unit interaction

Cited by 3 publications

References 36 publications

An electromagnetic modulator based on electrically controllable meta-molecule analogue to spontaneous emission cancellation

An electromagnetic modulator based on electrically controllable meta-molecule analogue to spontaneous emission cancellation

van der Waals metamaterials

Broadband electromagnetically induced transparency in metamaterials based on hybridization bandgap

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