Journal article
Off-resonance and non-resonant dispersion of Kerr nonlinearity for symmetric molecules [Invited]
Optics express, Vol.19(23), pp.22486-22495
11/07/2011
Handle:
https://hdl.handle.net/2376/107181
PMID: 22109126
Abstract
The exact formula is derived from the "sum over states" (SOS) quantum mechanical model for the frequency dispersion of the nonlinear refractive index coefficient n₂ for centrosymmetric molecules in the off-resonance and non-resonant regimes. This expression is characterized by interference between terms from two-photon transitions from the ground state to the even-symmetry excited states and one-photon transitions between the ground state and odd-symmetry excited states. When contributions from the two-photon terms exceed those from the one-photon terms, the non-resonant intensity-dependent refractive index n₂>0, and vice versa. Examples of the frequency dispersion for the three-level SOS model are given. Comparison is made with other existing theories.
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Details
- Title
- Off-resonance and non-resonant dispersion of Kerr nonlinearity for symmetric molecules [Invited]
- Creators
- George Stegeman - Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas, 71110, Heraklion, Greece. george@creol.ucf.eduMark G KuzykDimitris G PapazoglouStelios Tzortzakis
- Publication Details
- Optics express, Vol.19(23), pp.22486-22495
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- United States
- Identifiers
- 99900546872501842
- Language
- English
- Resource Type
- Journal article