All optical switch based on Fano resonance in metal nanocomposite photonic crystals

Asadi, Reza; Malekmohammad, Mohammad; Khorasani, Sina

doi:10.1016/j.optcom.2010.12.085

Cited by 39 publications

(11 citation statements)

References 26 publications

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“…Let V h and W h be two finite dimensional approximation spaces to the functional spaces V and W respectively. The discretized problem is obtained by substituting W h × V h for W × V in the formulation of problem (30). We introduce sets of basis functions, respectively for the spaces V h and W h , and map these onto Eq.…”

Section: Finite Element Discretizationmentioning

confidence: 99%

Modal formulation for diffraction by absorbing photonic crystal slabs

et al. 2012

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A finite element-based modal formulation of diffraction of a plane wave by an absorbing photonic crystal slab of arbitrary geometry is developed for photovoltaic applications. The semianalytic approach allows efficient and accurate calculation of the absorption of an array with a complex unit cell. This approach gives direct physical insight into the absorption mechanism in such structures, which can be used to enhance the absorption. The verification and validation of this approach is applied to a silicon nanowire array, and the efficiency and accuracy of the method is demonstrated. The method is ideally suited to studying the manner in which spectral properties (e.g., absorption) vary with the thickness of the array, and we demonstrate this with efficient calculations that can identify an optimal geometry.

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Section: Finite Element Discretizationmentioning

confidence: 99%

Modal formulation for diffraction by absorbing photonic crystal slabs

et al. 2012

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“…Thanks to the sharp asymmetric line shape, Fano resonance has been employed for applications such as high-sensitivity sensing [2] and low power optical switching and modulating [3,4]. Considerable work has been performed to achieve a sharp asymmetric Fano resonance theoretically and experimentally in a different material platform [5][6][7].…”

mentioning

confidence: 99%

“…Fano resonance, as opposed to a conventional Lorentz resonance with a symmetric line shape, has an asymmetric line shape, which resulted from the interference between a discrete localized state and a continuum state [1]. Thanks to the sharp asymmetric line shape, Fano resonance has been employed for applications such as high-sensitivity sensing [2] and low power optical switching and modulating [3,4]. Considerable work has been performed to achieve a sharp asymmetric Fano resonance theoretically and experimentally in a different material platform [5][6][7].…”

mentioning

confidence: 99%

Optically tunable Fano resonance in a grating-based Fabry–Perot cavity-coupled microring resonator on a silicon chip

Zhang

Yao

2016

Opt. Lett.

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A grating-based Fabry-Perot (FP) cavity-coupled microring resonator on a silicon chip is reported to demonstrate an all-optically tunable Fano resonance. In the device, an add-drop microring resonator (MRR) is employed, and one of the two bus waveguides is replaced by an FP cavity consisting of two sidewall Bragg gratings. By choosing the parameters of the gratings, the resonant mode of the FP cavity is coupled to one of the resonant modes of the MRR. Due to the coupling between the resonant modes, a Fano resonance with an asymmetric line shape resulted. Measurement results show a Fano resonance with an extinction ratio of 22.54 dB, and a slope rate of 250.4 dB/nm is achieved. A further study of the effect of the coupling on the Fano resonance is performed numerically and experimentally. Thanks to the strong light-confinement capacity of the MRR and the FP cavity, a strong two-photon absorption induced nonlinear thermal-optic effect resulted, which is used to tune the Fano resonance optically.

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“…Different from the traditional Lorentzian resonances arising in conventional resonators, the Fano resonances expose sharp dispersion and asymmetric line shapes, which have great potential applications in the fields of mapping [1,2], sensors [3][4][5][6], slow light device [7,8], plasmonic switchers [9,10], plasmonic filters [11][12][13], and so on. The physical principle of Fano resonance derives from the interference between beam waves which is usually correlative of the destructive interference between bright and dark modes [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a Tunable Fano-Like Resonance in the Hybrid Construction Between Graphene Nanorings and Graphene Grating

et al. 2016

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A tunable Fano-like resonance in the hybrid construction between graphene nanorings and graphene grating is proposed. The simulation results reveal that the Fano-like resonance is generated between two bright modes, which are different from the previous studies of coupling between the plasmonics bright and dark modes. The adjustability of this Fano resonance is simply researched by changing the geometry parameters of the composite structure and the Fermienergy of graphene. Also, the dual-Fano resonance can be realized by only decreasing the thickness of the substrate spacer without employing extra resonance mode.

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All optical switch based on Fano resonance in metal nanocomposite photonic crystals

Cited by 39 publications

References 26 publications

Modal formulation for diffraction by absorbing photonic crystal slabs

Modal formulation for diffraction by absorbing photonic crystal slabs

Optically tunable Fano resonance in a grating-based Fabry–Perot cavity-coupled microring resonator on a silicon chip

Numerical Investigation of a Tunable Fano-Like Resonance in the Hybrid Construction Between Graphene Nanorings and Graphene Grating

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