Full-band quantum-dynamical theory of saturation and four-wave mixing in graphene

Zheshen Zhang; Paul L. Voss

doi:10.1364/OL.36.004569

Full-band quantum-dynamical theory of saturation and four-wave mixing in graphene

Zheshen Zhang, Paul L. Voss

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

The linear and nonlinear optical response of graphene are studied within a quantum-mechanical, full-band, steady-state density-matrix model. This nonpurtabative method predicts the saturatable absorption and saturable four-wave mixing of graphene. The model includes τ₁ and τ₂ time constants that denote carrier relaxation and quantum decoherence, respectively. Fits to existing experimental data yield τ₂ < 1fs due to carrier-carrier scattering. τ₁ is found to be on the timescale from 250fs to 550 fs, showing agreement with experimental data obtained by differential transmission measurements.

Original language	English (US)
Pages (from-to)	4569-4571
Number of pages	3
Journal	Optics letters
Volume	36
Issue number	23
DOIs	https://doi.org/10.1364/OL.36.004569
State	Published - Dec 1 2011
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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abstract = "The linear and nonlinear optical response of graphene are studied within a quantum-mechanical, full-band, steady-state density-matrix model. This nonpurtabative method predicts the saturatable absorption and saturable four-wave mixing of graphene. The model includes τ1 and τ2 time constants that denote carrier relaxation and quantum decoherence, respectively. Fits to existing experimental data yield τ2 < 1fs due to carrier-carrier scattering. τ1 is found to be on the timescale from 250fs to 550 fs, showing agreement with experimental data obtained by differential transmission measurements.",

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AB - The linear and nonlinear optical response of graphene are studied within a quantum-mechanical, full-band, steady-state density-matrix model. This nonpurtabative method predicts the saturatable absorption and saturable four-wave mixing of graphene. The model includes τ1 and τ2 time constants that denote carrier relaxation and quantum decoherence, respectively. Fits to existing experimental data yield τ2 < 1fs due to carrier-carrier scattering. τ1 is found to be on the timescale from 250fs to 550 fs, showing agreement with experimental data obtained by differential transmission measurements.

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Full-band quantum-dynamical theory of saturation and four-wave mixing in graphene

Abstract

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