Dual ultrahigh-Q Fano Resonances of 3D gap metamaterials for slow light from ultraviolet to visible range

Feng, Songlin; Wang, Yajun; Fei, S; Yan, Zhendong; Yu, Lili; Chen, Jing; Tang, Chaojun; Liu, Fanxin

doi:10.1016/j.optcom.2023.129811

Cited by 30 publications

(7 citation statements)

References 41 publications

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“…The abilities of LSP to surpass the diffraction limit of conventional optics and enhance the light-matter interactions have attracted significant attentions. , These unique properties enable the transformation and manipulation of photonics, electronics, and nanotechnology, including biosensing, nonlinear optics, nanolasers, strong local field enhancement, and metamaterials. − However, the presence of huge nonradiative and radiative loss of metallic nanostructures results in a low quality factor ( Q ∼ 10 1 ) for LSPs. , Consequently, the performance of many applications of plasmonic-based nanodevices is limited . Current research focuses on addressing this issue by exploring various mechanisms to achieve high- Q plasmonic resonance, such as utilizing alternative plasmonic materials, reducing surface roughness, , incorporating gain media, , utilizing plasmonic Fano resonances , and employing lattice plasmon resonance (LPR). − …”

Section: Introductionmentioning

confidence: 99%

“…11,12 Consequently, the performance of many applications of plasmonic-based nanodevices is limited. 13 Current research focuses on addressing this issue by exploring various mechanisms to achieve high-Q plasmonic resonance, such as utilizing alternative plasmonic materials, 14 reducing surface roughness, 15,16 incorporating gain media, 17,18 utilizing plasmonic Fano resonances 19,20 and employing lattice plasmon resonance (LPR). 21−23 LPR is formed through the hybridization of LSPs and diffractive Wood anomalies 24,25 and can be achieved via the precise arrangement of metallic nanoparticles into a specifically two-dimensional periodic array.…”

Section: ■ Introductionmentioning

confidence: 99%

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High-Q and Intense Lattice Plasmon Resonance in Hexagonal Nonclose Packed Thin Silver Nanoshells Array

Gu,

Yang,

et al. 2024

J. Phys. Chem. C

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We theoretically demonstrate a high-Q and intense lattice plasmon resonance supported by the hexagonal nonclose packed thin silver nanoshells array. By introducing the diffraction coupling mechanism, the high-Q and intense lattice plasmon mode stemmed from the coupling between the TM 1 cavity plasmon mode and the diffraction mode of the first-order Wood anomaly is obtained in the thin silver nanoshells array, successfully solving the trade-off between the Q-factor and the resonance intensity of the cavity plasmon mode existed in a single silver nanoshell. In particular, a maximum Q-factor up to 610 of the lattice plasmon resonance is successfully achieved at 870 nm in the silver nanoshell array with an optimal silver thickness of 20 nm.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

High-Q and Intense Lattice Plasmon Resonance in Hexagonal Nonclose Packed Thin Silver Nanoshells Array

Gu,

Yang,

et al. 2024

J. Phys. Chem. C

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“…Fano resonance can be described as the interference between wide continuous and narrow discrete states [17,18]. Fano resonance lines show evident asymmetry and are easily affected by the geometric parameters and environment [19][20][21]. Therefore, Fano resonance offers unique advantages for sensing, enabling improved sensitivity and an enhanced figure of merit (FOM).…”

Section: Introductionmentioning

confidence: 99%

Multiple Fano resonances by MIM waveguide coupling whispering gallery mode resonator and application in Refractive index sensing

Gao,

Wang,

Chen

et al. 2024

Phys. Scr.

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In this study, a baffled metal – insulator – metal (MIM) waveguide coupled with a whispering gallery mode resonator (WGMR) is proposed. This structure could excite quadruple Fano resonances. The asymmetric Fano resonance transmittance spectrum and the electric field at the resonance peak were numerically simulated using the finite difference time domain method. The obtained data were fitted using the multimode interference coupled mode theory. The number of Fano resonance peaks was tuned by the outer radius of the WGMR. With other geometric parameters unchanged, the number of Fano resonance peaks increased with increasing outer radius of the WGMR. When the ring width was fixed, the structure could excite multiple Fano resonances within a certain outer radius range. This structure was used for refractive index sensing and its sensitivity and figure of merit (FOM) were 3004 nm/RIU and 3.14× 104 in a gas environment, respectively. Therefore, the proposed structure can excite multiple Fano resonances and achieve a high sensitivity and FOM, providing a theoretical basis for micro and nano applications.

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“…For instance, metallic nanostructures combining a bright superradiant dipole and a dark subradiant quadrupole have showcased Fano-type resonance and its EIT analogue [25][26][27]. Beyond this, characteristic features of Fano resonance have been observed in various structures ranging from core-shell lattices, nanoparticle clusters, split-ring configurations, side-coupled waveguide-cavities, to whispering-gallery micro-resonators, spanning radio to optical frequencies [28][29][30][31][32][33][34][35][36][37] . Fano resonance has proven to be of paramount significance for the development of miniaturized and high-performance photonic devices, including sensors, lasers, switches, modulators, diodes, and components for slowing light [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Active control of Fano resonance in side-coupled resonator-cavity systems

Jiang,

Gao,

Yang

et al. 2024

Phys. Scr.

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The study delves into actively controlling Fano resonance within a single-mode microstrip cavity, coupled with a split ring resonator (SRR) incorporating a varactor diode. This resonance arises from the interference between the SRR and a Fabry-Pérot cavity, resulting in a sharply asymmetric transmission spectrum. The varactor diode, situated within the SRR gap, is biased electrically via an external DC voltage source. Through manipulation of this bias voltage, both the transmission frequency and amplitude of the pronounced Fano resonance can be dynamically adjusted. Notably, a significant frequency shift of 345 MHz is achieved, accompanied by a transmission modulation depth of up to 34.2 dB. Moreover, at the Fano peak frequency of 2.65 GHz, the composite SRR-cavity structure exhibits a notable change in group delay, shifting by 21.3 ns with the bias voltage varying from 5 V to 2.6 V. These findings hold promise for the development of electrically controlled functional photonic devices, facilitating their adaptability and versatility in practical applications.

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Dual ultrahigh-Q Fano Resonances of 3D gap metamaterials for slow light from ultraviolet to visible range

Cited by 30 publications

References 41 publications

High-Q and Intense Lattice Plasmon Resonance in Hexagonal Nonclose Packed Thin Silver Nanoshells Array

High-Q and Intense Lattice Plasmon Resonance in Hexagonal Nonclose Packed Thin Silver Nanoshells Array

Multiple Fano resonances by MIM waveguide coupling whispering gallery mode resonator and application in Refractive index sensing

Active control of Fano resonance in side-coupled resonator-cavity systems

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