Engineering the harmonic generation in graphene

Zhou, Renlong; Guo, Tianjing; Huang, Lujun; Ullah, Kaleem

doi:10.1016/j.mtphys.2022.100649

Cited by 16 publications

(7 citation statements)

References 158 publications

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“…Thus, the single vacancy per 5500 carbon atoms leads to χ s false( 2 false) ≈ 2.5 × 10 7 .25em pm 2 normalV and χ b false( 2 false) ≈ 7.6 × 10 4 .25em pm normalV , which can be compared with the nonlinear second-order response of the 2D layered materials reported in the literature. The present results are nearly 10 3 times larger than those of hexagonal boron nitride, , or of graphene or multilayer graphene triggered by the dc current, , electrical doping, or symmetry break , (see also the review by R. Zhou et al). Moreover, the effective χ s (2) and χ b (2) found here are larger than the second-order susceptibility of such strongly nonlinear materials as transition metal dichalogenides. ,,− (See further details in the Supporting Information.)…”

mentioning

confidence: 48%

Atomic-Scale Defects Might Determine the Second Harmonic Generation from Plasmonic Graphene Nanostructures

Aguillon

Borisov

2023

J. Phys. Chem. Lett.

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In this work, we theoretically investigate the impact of the atomic scale lattice imperfections of graphene nanoflakes on their nonlinear response enhanced by the resonance between an incident electromagnetic field and localized plasmon. As a case study, we address the second harmonic generation from graphene plasmonic nanoantennas of different symmetries with missing carbon atom vacancy defects in the honeycomb lattice. Using the many-body time-dependent density matrix approach, we find that one defect in the nanoflake comprising over five thousand carbon atoms can strongly impact the nonlinear hyperpolarizability and override the symmetry constraints. The effect reported here cannot be captured using the relaxation time approximation within the quantum or classical framework. Results obtained in this work have thus important implications for the design of nonlinear graphene devices.

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mentioning

confidence: 48%

Atomic-Scale Defects Might Determine the Second Harmonic Generation from Plasmonic Graphene Nanostructures

Aguillon

Borisov

2023

J. Phys. Chem. Lett.

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“…155 Graphene's optical response is defined by its surface conductivity, which is related to its Fermi energy and may be modified dynamically using a bias voltage. 69 Various researchers have successfully achieved dynamically tunable perfect absorption using 3D DSM. For example, Liu et al 156 suggested a narrowband absorber in 2018 that made use of the metallic feature of 3D DSM at THz frequencies and achieved a total quality factor Q of 94.6.…”

Section: Optical Absorption In CD 3 Asmentioning

confidence: 99%

“…Optical harmonic generation (OHG) is a nonlinear phenomenon that is utilized to investigate low-dimensional physics 68 . It is employed in the field of bioimaging, optical signal processing, and the development of innovative coherent light sources 69 . The study of these interactions is the heart of nonlinear optics, and a cornerstone of modern photonics.…”

Section: Photonics With 3d Dsm Cd3as2mentioning

confidence: 99%

“…Graphene is one of the most widely used 2D materials and has shown great promise in metasurface applications 155 . Graphene’s optical response is defined by its surface conductivity, which is related to its Fermi energy and may be modified dynamically using a bias voltage 69 . Various researchers have successfully achieved dynamically tunable perfect absorption using 3D DSM.…”

Section: Photonics With 3d Dsm Cd3as2mentioning

confidence: 99%

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Recent advances in photonics of three-dimensional Dirac semimetal Cd3As2

et al. 2022

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Due to their unusual features in condensed matter physics and their applicability in optical and optoelectronic applications, three-dimensional Dirac semimetals (3D DSMs) have garnered substantial interest in recent years. In contrast to monolayer graphene, 3D DSM exhibits linear band dispersion despite its macroscopic thickness. Therefore, being a bulk material, it is easy to make nanostructures with 3D DSM, just as one normally does with metals such as gold and silver. Among 3D DSMs, cadmium arsenide (Cd 3 As 2 ) is quite famous and considered an excellent 3D DSM due to its chemical stability in air and extraordinary optical response. In this review, advances in 3D DSM Cd 3 As 2 fabrication techniques and recent progress in the photonics of 3D DSM Cd 3 As 2 are given and briefly reviewed. Various photonic features, including linear and nonlinear plasmonics, optical absorption, optical harmonic generation, and ultrafast dynamics, have been explored in detail. It is expected that Cd 3 As 2 would share an excellent tunable photonic response like graphene. We envision that this article may serve as a concise overview of the recent progress of photonics in 3D DSM Cd 3 As 2 and provides a compact reference for young researchers.

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“…The most known one is to excite the surface plasmons in graphene, in which graphene is an outstanding plasmonic material. 35,36 However, graphene behaves like a lossless medium, which is not able to support plasma at higher frequencies, such as the communication range. Meanwhile, as a new method to enhance the light-matter interactions, the mechanism involving qBICs in graphene-absorbers is rarely utilized.…”

Section: Introductionmentioning

confidence: 99%