Electric-field-induced optical second-harmonic generation in doped graphene

Margulis, V. A.; Muryumin, E. E.; Gaiduk, E.A.

doi:10.1016/j.ssc.2016.08.005

Cited by 15 publications

(9 citation statements)

References 40 publications

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“…Gate voltage is found to tune linear optical properties due to modulation in Fermi level. [ 275–279 ] For instance, PL intensity of 2D TMDs can be tuned successfully using gate voltage. [ 32 ] This electro‐optic modulation has huge potential for various photonic devices such as, optical switching and communications.…”

Section: Tuning Of Optical Harmonic Generation In 2d Layered Materialsmentioning

confidence: 99%

“…[ 58 ] A modulation in SHG and THG responses in graphene via doping are also demonstrated in other studies. [ 279,280 ] Particularly, THG response in graphene is found to be exceptionally large and varied by orders of magnitude with the help of gate‐controlled doping. [ 86 ] Although gate tuning of SHG is well known, the role of exciton charging effects still need further in‐depth investigations and this may lead to potential applications for electro‐optic modulators.…”

Section: Tuning Of Optical Harmonic Generation In 2d Layered Materialsmentioning

confidence: 99%

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Optical Harmonic Generation in 2D Materials

Khan

Zhang

Ishfaq

et al. 2021

Adv Funct Materials

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2D materials are emerging as ideal candidates for fundamental investigations and new technologies due to their unique optoelectronic properties. Giant nonlinear susceptibility and perfect phase matching in 2D materials lead to extraordinary nonlinear light matter interactions, thus enabling several potential applications and fundamental scientific discoveries in nonlinear optics. For instance, second harmonic generation in 2D materials play an important role in optical devices such as, lasers, tunable waveguides, electro‐optic modulators, and switches. This review will discuss optical harmonic generation (OHG) processes, various characterization modes, and tuning techniques in 2D materials. The future prospectives for OHG in 2D materials is discussed. The extremely promising attributes of combining nonlinear optics and 2D materials is becoming a highly important multidisciplinary field.

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Section: Tuning Of Optical Harmonic Generation In 2d Layered Materialsmentioning

confidence: 99%

Section: Tuning Of Optical Harmonic Generation In 2d Layered Materialsmentioning

confidence: 99%

Optical Harmonic Generation in 2D Materials

Khan

Zhang

Ishfaq

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…They exist in the absence of free carriers, and have an analogue in the field induced second order nonlinearity of usual semiconductors, which leads to processes such as electric-field induced second harmonic generation (EFISH). 44,46 Adopting this perspective, we can write the effective second order conductivity σ (3) a /∆ = 0.01. In (b), the current induced contribution is also plotted.…”

Section: Nonlinear Optical Conductivity Of Gapped Graphenementioning

confidence: 99%

Intraband divergences in third order optical response of 2D systems

Cheng,

Sipe,

et al. 2018

Preprint

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“…In the telecommunication frequency window (∼1.3-1.6 µm), graphene's third-order susceptibility mea-sured by the third-harmonic generation (THG) experiment is ∼10 −15 m 2 V 2 [21]. Also, there are a number of theoretical papers on the nonlinear optical properties of graphene [28][29][30][31][32][33][34][35][36][37][38] and nanostructured graphene, such as graphene nanoribbons (GNRs) [39,40].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical response in graphene nanoribbons: The critical role of electron scattering

2018

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Nonlinear nanophotonics has many potential applications, such as in mode locking, frequencycomb generation, and all-optical switching. The development of materials with large nonlinear susceptibility is key to realizing nonlinear nanophotonics. Nanostructured graphene systems, such as graphene nanoribbons and nanoislands, have been predicted to have a strong plasmon-enhanced nonlinear optical behavior in the nonretarded regime. Plasmons concentrate the light field down to subwavelength scales and can enhance the nonlinear optical effects; however, plasmon resonances are narrowband and sensitive to the nanostructure geometry. Here, we show that graphene nanoribbons, particularly armchair graphene nanoribbons, have a remarkably strong nonlinear optical response in the long-wavelength regime and over a broad frequency range, from terahertz to the nearinfrared. We use a quantum-mechanical master equation with a detailed treatment of scattering and show that, in the retarded regime, electron scattering has a critical effect on the optical nonlinearity of graphene nanoribbons, which cannot be captured via the commonly used relaxation-time approximation. At terahertz frequencies, where intraband optical transitions dominate, the strong nonlinearity (in particular, third-order Kerr nonlinearity) stems from the jagged shape of the electron energy distribution, caused by the interband electron scattering mechanisms along with the intraband inelastic scattering mechanisms. We show that the relaxation-time approximation fails to capture this quantum-mechanical phenomenon and results in a significant underestimation of the intraband nonlinearity. At the midinfrared to nearinfrared frequencies, where interband optical transitions dominate, the Kerr nonlinearity is significantly overestimated within the relaxation-time approximation. These findings unveil the critical effect of electron scattering on the optical nonlinearity of nanostructured graphene, and also underscore the capability of this class of materials for nonlinear nanophotonic applications.

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Electric-field-induced optical second-harmonic generation in doped graphene

Cited by 15 publications

References 40 publications

Optical Harmonic Generation in 2D Materials

Optical Harmonic Generation in 2D Materials

Intraband divergences in third order optical response of 2D systems

Nonlinear optical response in graphene nanoribbons: The critical role of electron scattering

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