Strong, Fifth-Order, Nonlinear Optical Response Resulting from Local-Field-Induced Microscopic Cascading in C60

We have calculated the fifth-order nonlinear optical response at experimentally relevant field strengths within the model of massless Dirac fermions by coupling the massless Dirac fermions to the time-dependent electric field quantum mechanically. It demonstrates that the fifth-order nonlinear optical response plays an important role in the contribution to the optical conductivity of pristine single-layer graphene in the low frequency part of the terahertz regime. The nonlinear effect can enhance the optical activity of single-layer graphene in the terahertz regime and significantly decreases the transmittance of graphene in the regime of frequencies from 0.1 to 0.5 THz. These properties of graphene may be used for photonic and optoelectronic device in the terahertz regime.

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Nonlinear optical response of one‐dimensional molecular crystals: Breakdown of the local field approximation

The Journal of Chemical Physics ◽

10.1063/1.462363 ◽

1992 ◽

Vol 96 (11) ◽

pp. 8109-8116 ◽

Cited By ~ 16

Author(s):

Frank C. Spano

Keyword(s):

Local Field ◽

Nonlinear Optical ◽

Molecular Crystals ◽

Optical Response ◽

Field Approximation ◽

Nonlinear Optical Response ◽

One Dimensional

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Nonlinear optical response in Kronig–Penney type graphene superlattice in terahertz regime

Modern Physics Letters B ◽

10.1142/s0217984915500608 ◽

2015 ◽

Vol 29 (13) ◽

pp. 1550060 ◽

Cited By ~ 1

Author(s):

Lijuan Jiang ◽

Rui-Yang Yuan ◽

Xin Zhao ◽

Jing Lv ◽

Hui Yan

Keyword(s):

Low Temperature ◽

External Field ◽

Nonlinear Optical ◽

Low Frequency ◽

Optical Response ◽

Nonlinear Optical Response ◽

Nonlinear Responses ◽

Graphene Superlattice ◽

Fifth Order ◽

Optoelectronics Devices

The terahertz nonlinear optical response in Kronig–Penney (KP) type graphene superlattice is demonstrated. The single-, triple- and quintuple-frequencies of the fifth-order nonlinear responses are investigated for different frequencies and temperatures with the angle φ along the periodicity of the superlattice toward the external field tuning from 0 to π/2. The results show that the fifth-order nonlinear optical conductance of graphene superlattice is enhanced in the terahertz regime when φ = 0, i.e. an external field is applied along the periodicity of the superlattice. The fifth-order nonlinear optical conductances at φ = 0 for different frequencies and temperatures are calculated. The results show that the nonlinear optical conductance is enhanced in low frequency and low temperature. Our results suggest that KP type graphene superlattices are preferred structures for developing graphene-based nonlinear photonics and optoelectronics devices.

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