Enhancement of efficiency of second-harmonic generation from MoS2 monolayers in 1D Fibonacci photonic crystals

Zarif, Farhad Asadollah; Nezhad, Mehdi Khazaei; Rezaieun, H. Rastegrar Moghaddam

doi:10.1016/j.photonics.2019.100726

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…With intrinsically broken crystal inversion symmetry and large second-order nonlinear responses, monolayers of transition-metal dichalcogenides such as MoS2 have shown great promise for future nonlinear light sources [26][27][28] . With the field enhancement effect stated above, the second harmonic generation efficiency of MoS2 can be boosted furthermore, via placing on hot spots.…”

Section: Is Described By the Hamiltonianmentioning

confidence: 99%

Multiplexing-oriented plasmon-MoS2 hybrid metasurfaces driven by nonlinear quasi bound states in the continuum

Ren,

Feng,

Yao

et al. 2020

Preprint

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The nonlinear optical devices with wavelength-multiplexed high-nonlinear susceptibilities may have many potential applications in frequency metrology 1 , timing characterization 2 , quantum information 3 , when multiple color signals need to be nonlinearly processed simultaneously. It is possible to realize this kind of device with metasurfaces using their various nanostructure designability.Here we introduce the nonlinear plasmon-assisted MoS2 hybrid metasurfaces with multiple high-Q radiation channels that originate from the bound states in the continuum. By exploiting the sharp resonances of light-trapping modes, we demonstrate that the optical nonlinearity can be significantly boosted and smartly tuned. The mechanisms to identify and create the trapped resonances that fueled by the bound states in the continuum are elaborated, and our work suggests a route to use nonlinear hybrid metasurfaces for realizing high-efficiency multi-channel second-order nonlinear optical devices.

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Section: Is Described By the Hamiltonianmentioning

confidence: 99%

Multiplexing-oriented plasmon-MoS2 hybrid metasurfaces driven by nonlinear quasi bound states in the continuum

Ren,

Feng,

Yao

et al. 2020

Preprint

View full text Add to dashboard Cite

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“…During these years, different geometries such as rough photonic crystals [25], sinusoidal densities [26], cylindrical photonic crystals [27], etc. as well as different arrangements including, Thue-Morse quasi-photonic crystals [28], Fibonacci [29], Octonacci [30], disordered [31], etc. are investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect of Geometry on the Electromagnetic Wave Transport Properties of Photonic Crystals: Comparison of Top-Flat and Top-Curved Refractive Index Profiles

Solaimani

Nejati

2021

Preprint

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In the current paper, we try to engineer the refractive index profile in a one-dimensional photonic crystal as a powerful tool to manage the electromagnetic wave transmission properties. For this purpose, we have compared four sinusoidal, rectangular, triangular, and saw-tooth refractive index profile types. In this way, we have used a transfer matrix method accompanied by the discretization of the spatial domain. This method can readily be applied to any arbitrary continuous refractive index profile. Then, we have tried to address the effects of different geometrical and physical parameters, including the photonic crystal length L, dielectric permittivity εd, number of layers and plasma density np, etc. on the light propagation through the mentioned photonic crystals. In the proposed two-layer plasma/dielectric photonic crystals we could observe acceptable ranges of Omni-directional photonic band gaps that their position width and their number can be regulated. We determine the most and least tunable systems.

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“…Nonlinear photonic crystals (NPCs) pave the way to improve and modify nonlinear optical processes. Various nonlinear optical phenomena such as nonlinear frequency conversion [8], second and high harmonic generation [9], four-wave mixing [10] and optical bistability [11,16,17] have been explored in photonic crystals both theoretically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Optical Bistability In Nonlinear Photonic Crystals Based on Metallic Nanoparticles And Graphene

Naseri

Adl

2021

Preprint

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In this work, we revisit the optical response of a one-dimensional photonic crystal consisting of graphene monolayers and a plasmonic nanocomposite as a defect layer in the structure. By taking advantage of the modified transfer matrix approach, the analytical solution of the light transmission and field distribution of the photonic crystal are evaluated. Besides, by considering one of the layers as a Kerr-nonlinear medium, we delve into optical bistability phenomenon in the model for two different cases. Our numerical results reveal that the proposed photonic crystal can enhance the field distribution and reduce the optical bistability’s threshold in comparison to the conventional photonic crystals. Furthermore, the optical bistable switch-up and switch-down thresholds of the proposed resonator can be tailored flexibly by plasmon-plasmon interactions in the defect layer. Finally, the electric field distribution amelioration and optical bistability by means of graphene layers in the structure are attainable. The influences of the parameters such as the graphene and the nanocomposite on the performance of OB are analyzed and compared in the two different cases. Therefore, present approach can lay the groundwork for designing highly sensitive surface plasmon resonance biosensors and switches where the proposed technique may find unprecedented capabilities.

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Enhancement of efficiency of second-harmonic generation from MoS2 monolayers in 1D Fibonacci photonic crystals

Cited by 8 publications

References 31 publications

Multiplexing-oriented plasmon-MoS2 hybrid metasurfaces driven by nonlinear quasi bound states in the continuum

Multiplexing-oriented plasmon-MoS2 hybrid metasurfaces driven by nonlinear quasi bound states in the continuum

Effect of Geometry on the Electromagnetic Wave Transport Properties of Photonic Crystals: Comparison of Top-Flat and Top-Curved Refractive Index Profiles

Tailoring Optical Bistability In Nonlinear Photonic Crystals Based on Metallic Nanoparticles And Graphene

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