Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session Y40: Plasmons in Graphene and Optical Properties of 2D Materials
11:15 AM–2:15 PM,
Friday, March 9, 2018
LACC Room: 501C
Sponsoring Unit: DCMP
Chair: Rahul Rao, UES, Inc.
Abstract: Y40.00007 : Strong Optical Nonlinearity of Graphene Nanoribbons*
12:27 PM–12:39 PM
(Electrical and Computer Engineering, University of Wisconsin-Madison)
Many nonlinear nanophotonics applications require strong nonlinear light-matter interaction; hence, there is ongoing research on finding materials with a strong nonlinear optical response. Here, we calculate the third-order Kerr susceptibility and the third-harmonic-generation susceptibility of graphene nanoribbons (GNRs) and show that, in the long-wavelength regime, GNRs have a remarkably strong nonlinear optical response, particularly the Kerr optical response, in a broad frequency range: from terahertz to near-infrared. The strong optical nonlinearity of GNRs in the long-wavelength region enables stacking them on top of one another and embedding them in the on-chip semiconductor waveguides, and therefore makes GNRs a promising material for integrated nonlinear nanophotonics applications. Our analysis is based on perturbatively solving a Lindblad-type quantum-master equation. We show that electron scattering plays a nontrivial role in the nonlinear optical response of GNRs and semiclassical approaches, such as the relaxation-time approximation, are not accurate for calculating the GNRs optical nonlinearity.
*This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, award DE-SC0008712.
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