Electromagnetically Induced Transparency in All-Dielectric U-Shaped Silicon Metamaterials

Qin, Mengyao; Pan, Chengda; Chen, Yu; Ma, Qiang; Liu, Shikang; Wu, E; Wu, Botao

doi:10.3390/app8101799

Cited by 37 publications

(15 citation statements)

References 43 publications

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“…However, the Q factor could be improved by adjusting structural parameters, coupling strength between resonant structures, or by using dielectric materials 38 – 40 …”

Section: Structural Design and Simulation Analysismentioning

confidence: 99%

“…37 However, the Q factor could be improved by adjusting structural parameters, coupling strength between resonant structures, or by using dielectric materials. [38][39][40] To understand the origin of the EIT window more deeply, Figs. 3(d)-3(f) depict the surface current distributions of the metamaterial at different resonant frequencies.…”

Section: Analysis Of Eit Effectmentioning

confidence: 99%

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Tunable terahertz metamaterial based on vanadium dioxide for electromagnetically induced transparency and reflection

et al. 2023

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To realize the electromagnetically induced transparency (EIT) or reflection (EIR) effect in the terahertz band, many metamaterial structures have been proposed. However, these structures usually have a single function of EIT effect or EIR effect, and it is a major challenge for a metamaterial structure to perform multiple functions. In this study, a switchable multifunctional hybrid metamaterial is proposed, which realizes the combined function of tunable EIT effect and EIR effect at THz regions through the integration of vanadium dioxide (VO 2 ) and metal metamaterial. Moreover, by changing the conductivity of VO 2 , the intensity modulations of EIT window and EIR window reach 36.11% and 50.59%, respectively. The surface current distribution and electric field responses are used to analyze the physical mechanisms of the EIT effect and the EIR effect. In addition, the active tuning mechanism of the metamaterial is theoretically explored based on the "two-particle" model. The designed hybrid metamaterial provides a simple approach to realize tunable EIT effect and EIR effect in THz metamaterials. This work opens up a possible way to achieve switchable functions (EIT or EIR) in a single device, which may find potential applications in optical switches, sensing, filtering, and slow light devices.

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“…However, the Q factor could be improved by adjusting structural parameters, coupling strength between resonant structures, or by using dielectric materials 38 – 40 …”

Section: Structural Design and Simulation Analysismentioning

confidence: 99%

Section: Analysis Of Eit Effectmentioning

confidence: 99%

Tunable terahertz metamaterial based on vanadium dioxide for electromagnetically induced transparency and reflection

et al. 2023

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“…The strong coupling between the two modes induced a transmission peak of approximately 0.45 dB (0.9) at 1560 nm. Qin et al presented a U-shaped metamaterial made of silicon on a quartz substrate for achieving a low loss of 0.36 dB (0.92) at 908.5 nm [92]. To support the low loss property, the structure introduced FOM of 29 and Q-factor of 130.…”

Section: Figure 2 the Inherent Losses In Metamaterials [23]mentioning

confidence: 99%

Overview of Approaches for Compensating Inherent Metamaterials Losses

et al. 2022

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Metamaterials are synthetic composite structures with extraordinary electromagnetic properties not readily accessible in ordinary materials. These media attracted massive attention due to their exotic characteristics. However, several issues have been encountered, such as the narrow bandwidth and inherent losses that restrict the spectrum and the variety of their applications. The losses have become the principal limiting factor when employing metamaterials in real-world applications. Consequently, overcoming them is crucially important and of practical necessity. This paper discusses the practical applications of metamaterials in constructing functional devices and the effects of the losses on such devices. In more depth, it reviews the available approaches for reducing the metamaterial losses developed over the last two decades in the light of available literature. These approaches include the utilization of the principles of electromagnetically induced transparency (EIT), geometric tailoring of the metamaterial structures, and embedding gain materials. Further, computational optimization techniques, such as particle swarm optimization (PSO) and genetic algorithm (GA), are also discussed to design low-loss metamaterials. The EIT-like metamaterial and the including of gain materials are systematic and universal approaches exhibiting low loss approaching zero. In contrast, the other two are not systematic and universal approaches.

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“…U-resonators have already been studied for realizing microstrip-based hairpin filters to obtain a more compact layout for coupled line filters [ 14 ]. An additional utilization is in periodic structures designed for high-frequency meta-surfaces [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Design of U-Shaped Frequency Tunable Microwave Filters in MEMS Technology

Giacomozzi

Proietti

Capoccia

et al. 2023

Sensors

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U-shaped microwave resonators implemented by RF MEMS switches can be considered the result of a novel design approach for obtaining small-footprint tunable resonators, owing to the bent shape of the resonator and the microsystem solution for changing the frequency of resonance. In this paper, we discuss the design approach for potential configurations of U-shaped structures combined with ohmic RF MEMS switches. Owing to their prospective application in RADAR and satellite systems, the devices were assessed for K-Band operation, specifically for 15 GHz, 20 GHz, and 26 GHz. The ON-OFF states determined by an electrostatic actuation of metal beams composing the RF MEMS ohmic switches allow for selecting different path lengths corresponding to different frequencies. In this contribution, initial configurations were designed and manufactured as a proof-of-concept. The advantages and critical aspects of the designs are discussed in detail.

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Electromagnetically Induced Transparency in All-Dielectric U-Shaped Silicon Metamaterials

Cited by 37 publications

References 43 publications

Tunable terahertz metamaterial based on vanadium dioxide for electromagnetically induced transparency and reflection

Tunable terahertz metamaterial based on vanadium dioxide for electromagnetically induced transparency and reflection

Overview of Approaches for Compensating Inherent Metamaterials Losses

Design of U-Shaped Frequency Tunable Microwave Filters in MEMS Technology

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