Full-band quantum-dynamical theory of saturation and four-wave mixing in graphene
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 τ(1) and τ(2) time constants that...
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| Published in | Optics letters Vol. 36; no. 23; p. 4569 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
United States
01.12.2011
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| Online Access | Get more information |
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| Summary: | 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 τ(1) and τ(2) time constants that denote carrier relaxation and quantum decoherence, respectively. Fits to existing experimental data yield τ(2) < 1 fs due to carrier-carrier scattering. τ(1) is found to be on the timescale from 250 fs to 550 fs, showing agreement with experimental data obtained by differential transmission measurements. |
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| ISSN: | 1539-4794 |
| DOI: | 10.1364/ol.36.004569 |