Multiphoton resonant excitation of Fermi-Dirac sea in graphene at the interaction with strong laser fields

Avetissian, H. K.; Avetissian, A. K.; Mkrtchian, G. F.; Sedrakian, Khachik V.

doi:10.1117/1.jnp.6.061702

Cited by 36 publications

(29 citation statements)

References 26 publications

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“…In an earlier communication 1 we sketched some of the relevant work done before early 2014; recent contributions include a calculation by Mikhailov [42] of THG, 2 and a numerical solution of the equation of motion under strong laser fields by Avetissian et al [29,[44][45][46]. All of these studies focused on one or a few nonlinear effects.…”

Section: Introductionmentioning

confidence: 99%

Third-order nonlinearity of graphene: Effects of phenomenological relaxation and finite temperature

2015

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We investigate the effect of phenomenological relaxation parameters on the third-order optical nonlinearity of doped graphene by perturbatively solving the semiconductor Bloch equation around the Dirac points. An analytic expression for the nonlinear conductivity at zero temperature is obtained under the linear dispersion approximation. With this analytic formula as a starting point, we construct the conductivity at finite temperature and study the optical response to a laser pulse of finite duration. We illustrate the dependence of several nonlinear optical effects, such as third harmonic generation, Kerr effects and two photon absorption, parametric frequency conversion, and two-color coherent current injection, on the relaxation parameters, temperature, and pulse duration. In the special case where one of the electric fields is taken as a dc field, we investigate the dc-currentand dc-field-induced second-order nonlinearities, including dc-current-induced second harmonic generation and difference frequency generation.

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Section: Introductionmentioning

confidence: 99%

Third-order nonlinearity of graphene: Effects of phenomenological relaxation and finite temperature

2015

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“…However, the dependence of the nonlinearity on chemical potential, temperature, and the excitation frequency have not been systematically measured. Of the theoretical studies reported, most are still at the level of single particle approximations within different approaches, which include perturbative treatments based on Fermi's golden rule [25,26], the quasiclassical Boltzmann kinetic approach [1,2,27,28], and quantum treatments based on semiconductor Bloch equations (SBE) or equivalent strategies [3,[29][30][31][32][33][34][35][36][37][38]. When optical transitions around the Dirac points dominate, analytic expressions for the third order conductivities can be obtained perturbatively by employing the linear dispersion approximation [3,[35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the optical nonlinearity of doped and gapped graphene: From weak to strong field excitation

2015

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Numerically solving the semiconductor Bloch equations within a phenomenological relaxation time approximation, we extract both the linear and nonlinear optical conductivities of doped graphene and gapped graphene under excitation by a laser pulse. We discuss in detail the dependence of second harmonic generation, third harmonic generation, and the Kerr effects on the doping level, the gap, and the electric field amplitude. The numerical results for weak electric fields agree with those calculated from available analytic perturbation formulas. For strong electric fields when saturation effects are important, all the effective third order nonlinear response coefficients show a strong field dependence.

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“…More than twenty years single layer graphene (SG) [1,2] has attracted the giant interest for its unusual electronic transport and the characteristics of relativistic charge carriers behaving like massless chiral Dirac fermions [3][4][5][6][7][8][9][10][11][12][13][14]. Bilayer graphene (BG) are consisted of two graphene AB stacked single layers.…”

Section: Introductionmentioning

confidence: 99%

“…(9),(18), and (23) with relations Eqs. (24)-(26), in the certain case of linearly polarized EM wave with the dimensionless vector potential A(t) = − eχ sin(2πτ )…”

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Multiphoton cross sections of conductive electrons stimulated bremsstrahlung in doped bilayer graphene

Ghazaryan

Sedrakian

2019

J. Nanophoton.

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The quantum theory of multiphoton stimulated bremsstrahlung of charged carriers on an arbitrary electrostatic potential of impurity ion in doped bilayer graphene at the presence of coherent electromagnetic radiation is developed. A terahertz wave field is considered exactly, while the electrostatic potential of doped ions as a perturbation. The essentially nonlinear response of bilayer graphene to a pump wave and significant differences from the case of a single layer graphene are shown, which can be associated to nonlinear parabolic dispersion. The latter opens new way to manipulate with the electronic transport properties of conductive electrons of bilayer graphene by coherent radiation field of terahertz or near-infrared frequencies.

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Multiphoton resonant excitation of Fermi-Dirac sea in graphene at the interaction with strong laser fields

Cited by 36 publications

References 26 publications

Third-order nonlinearity of graphene: Effects of phenomenological relaxation and finite temperature

Third-order nonlinearity of graphene: Effects of phenomenological relaxation and finite temperature

Numerical study of the optical nonlinearity of doped and gapped graphene: From weak to strong field excitation

Multiphoton cross sections of conductive electrons stimulated bremsstrahlung in doped bilayer graphene

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