Large group index induced by asymmetric split ring resonator dimer

Zhang, Fuli; He, Xuan; Zhang, Xu; Zhou, Youwen; An, Shi; Yu, Gengyao; Pang, Linna

doi:10.1063/1.4833817

Cited by 21 publications

(10 citation statements)

References 31 publications

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“…SRRs have been utilized to realize the sharp non-radiative resonance in various MIT systems 27 28 29 33 34 35 36 primarily due to the considerable flexibility in engineering their magnetic response. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the recent development of metamaterials offers unprecedented flexibility in creating electromagnetic resonances for manipulating electromagnetic waves by engineering the properties of their artificial subwavelength “atomic” structure 14 15 . Besides exhibiting unconventional material properties, such as negative permeability 16 17 , negative refractive index 18 19 20 , and near-zero-index 21 22 , metamaterials have also recently been utilized to demonstrate a classical analogue of EIT through the careful design and arrangement of subwavelength resonating elements 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 . Metamaterial-induced transparency (MIT), taking advantage of the coherent interference between electromagnetic fields induced by radiative (‘bright’) and non-radiative (‘dark’) resonators, enables EIT-like effects at room temperature without the need for other external physical stimuli.…”

mentioning

confidence: 99%

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Handedness Dependent Electromagnetically Induced Transparency in Hybrid Chiral Metamaterials

Kang

Jiang

Yue

et al. 2015

Sci Rep

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We provide the first experimental demonstration of the handedness dependent electromagnetically induced transparency (EIT) in chiral metamaterials during the interaction with circularly polarized waves. The observed chiral-sensitive EIT phenomena arise from the coherent excitation of a non-radiative mode in the component split ring resonators (SRRs) produced by the corresponding Born−Kuhn type (radiative) resonators that are responsible for the pronounced chirality. The coherent coupling, which is dominated by the bonding and antibonding resonances of the Born−Kuhn type resonators, leads to an extremely steep dispersion for a circularly polarized wave of predefined handedness. Accordingly, retrieved effective medium parameters from simulated results further reveal a difference of 80 in the group indices for left- and right-handed circularly polarized waves at frequencies within the EIT window, which can potentially result in handedness-sensitive pulse delays. These chiral metamaterials which enable a handedness dependent EIT effect may provide more degrees of freedom for designing circular polarization based communication devices.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Handedness Dependent Electromagnetically Induced Transparency in Hybrid Chiral Metamaterials

Kang

Jiang

Yue

et al. 2015

Sci Rep

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“…Optical reflector with two micro rings coupled to two bus waveguides are discussed in [21] to explain transmission and group delay. Asymmetric splitting of resonator dimer is presented to achieve large group index [22]. In this paper, we investigate group delay and group index performance of single stage slotted microring resonator and extends the investigation for multi stage.…”

Section: Introductionmentioning

confidence: 98%

Controlling group delay in single and multi-stage slotted ring resonator with fabrication tolerances

Khandokar

Bakaul

Skafidas

et al. 2015

2015 IEEE International Broadband and Photonics Conference (IBP)

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Optical delay and corresponding group index of structure composed of slab waveguide coupled with slotted ring resonator are investigated in this paper. Ring resonators have attracted a lot of attention to develop optical delay line which has numerous applications in communication. Properties of these micro ring resonators are highly dependent on waveguide geometry and can be tailored for various applications with minor changes. This paper investigates performance of single and multi stage ring resonators by manipulating geometry and gap between slab and ring waveguide for single mode propagation which may assist to make well informed decisions in the selection process of best-suited ring waveguide for particular application. This investigation is further extended to verify the tolerance of the design in case of fabrication errors with dimension of ±10nm.

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“…[14][15][16] Till now, a large amount of plasmonic optical components based on SPPs have been proposed and demonstrated both numerically and experimentally in metallic nanostructures. The plasmon-induced transparency (PIT) effect is a kind of Fano resonances, 17 high Q dark mode in Fano metamaterial has been studied by Cao et al, 18 Fano resonance of an asymmetric dielectric wire pair was studied by Zhang et al 19 The PIT effect has been investigated intensively in many structures such as metamaterials, 20-26 plasmonic resonators, 27 plasmonic waveguide side-coupled plasmonic nanocavities, 28 split ring resonator, 29 and metallic bar gratings. 30 However, there have been few studies on PIT effect in a system using single resonator.…”

mentioning

confidence: 98%

Plasmon-induced transparency effect in a single circular split-ring core ring resonator side-coupled to a metal-isolator-metal waveguide

Zhu

Wang

Han

et al. 2015

Journal of Applied Physics

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We theoretically and numerically investigated the plasmon-induced transparency (PIT) effect in a single circular split-ring core ring resonator (CSRCRR) side coupled to a metal–isolator–metal waveguide, in which we can realize a single PIT effect window. The transmission line theory and the coupled mode theory are used. The results (transmission peak varies from 10% to 75%) show that the PIT window results from the destructive interference between the resonance modes in the CSRCRR. Then, the limit of wavelength detuning of the two modes in CSRCRR is studied. This work provides a new structure to realize the PIT effect and shows a new way to judge whether the phenomenon is the real PIT effect or not.

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Large group index induced by asymmetric split ring resonator dimer

Cited by 21 publications

References 31 publications

Handedness Dependent Electromagnetically Induced Transparency in Hybrid Chiral Metamaterials

Handedness Dependent Electromagnetically Induced Transparency in Hybrid Chiral Metamaterials

Controlling group delay in single and multi-stage slotted ring resonator with fabrication tolerances

Plasmon-induced transparency effect in a single circular split-ring core ring resonator side-coupled to a metal-isolator-metal waveguide

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