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Your search keyword '"Meng, Ziming"' showing total 39 results
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39 results on '"Meng, Ziming"'

7. High Electric Field Enhancement Induced by Modal Coupling for a Plasmonic Dimer Array on a Metallic Film.

Author

Liu, Jiawei, Meng, Ziming, and Zhou, Jinyun

Subjects
METALLIC films, ELECTRIC fields, POLARITONS, RABI oscillations, GOLD films, PLASMONICS
Abstract

A giant electric field on a subwavelength scale is highly beneficial for boosting the light–matter interaction. In this paper, we investigated a hybrid structure consisting of a hemispheric dimer array and a gold film and realized resonant mode coupling of the surface lattice resonance (SLR) and surface plasmon polariton (SPP). Mode coupling is demonstrated by observing anti-crossing in reflection spectra, which corresponds to Rabi splitting. Although the resonance coupling does not enter the strong coupling regime, an improved quality factor (Q~350) and stronger electric field enhancement in the gap region of the dimer (i.e., hot spot) in our hybrid structure are obtained compared to those of the single dimer or dimer array only. Remarkably, the magnitude of electric field enhancement over 500 can be accessible. Such high field enhancement makes our hybridized structure a versatile platform for the realization of ultra-sensitive biosensing, low-threshold nanolasing, low-power nonlinear optical devices, etc. [ABSTRACT FROM AUTHOR]

Published
2024
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28. Formation of 1×3 splitting by embedded double-layer reflective grating under second Bragg illumination.

Author

Gao, Chenhao, Wang, Bo, Wen, Kunhua, Meng, Ziming, Nie, Zhaogang, Xing, Xiangjun, Chen, Li, Lei, Liang, and Zhou, Jinyun

Subjects
FIREPLACES, BEAM splitters, MODAL analysis, DIFFRACTION gratings, LIGHTING
Abstract

In order to obtain a 1 × 3 grating with high performance, we designed a double-layer reflective grating beam splitter with a covering layer at a wavelength of 1550 nm. We obtain a better grating structure by modal analysis and rigorous coupled-wave method. The reflectivity of the three diffraction orders for the grating is close to 33.3%. The optimized data show that the grating beam splitter has a large period process tolerance for TE polarization. The grating performance has high incident performance and uniform splitting effect. [ABSTRACT FROM AUTHOR]

Published
2019
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35. Fano Resonance Based on End-Coupled Cascaded-Ring MIM Waveguides Structure.

Author

Wen, Kunhua, Hu, Yihua, Chen, Li, Zhou, Jinyun, He, Miao, Lei, Liang, Meng, Ziming, Wu, Yanjie, and Li, Jianfeng

Subjects
PLASMONICS, RESONATORS, METAL-insulator-metal devices, FANO resonance, WAVEGUIDES
Abstract

Though adding a groove to a plasmonic end-coupled perfect ring (PR) resonator, two additional resonance modes, which can be controlled by the length of the groove, will arise in this proposed ring-groove (RG) joint metal-insulator-metal (MIM) waveguide. By further cascading, the PR resonator and the RG joint resonator, single and dual Fano resonances with asymmetric line shapes are obtained due to the interference effects between the dark modes and the bright modes. High figure of merit and high refractive-index sensitivity are achieved, and thus this structure is suitable for the biochemistry sensing area. Interestingly, normal and abnormal dispersions are also investigated for the Fano peaks and dips, respectively. The performances of the proposed structure are investigated by using the finite-difference time-domain method. [ABSTRACT FROM AUTHOR]

Published
2017
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