Off-resonance and non-resonant dispersion of Kerr nonlinearity for symmetric molecules [Invited]

George Stegeman, Mark G. Kuzyk, Dimitris G. Papazoglou, Stylianos Tzortzakis

Research output: Contribution to journalArticle

9 Citations (Scopus)

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 offresonance 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 n20, and vice versa. Examples of the frequency dispersion for the three-level SOS model are given. Comparison is made with other existing theories.

Original languageEnglish
Pages (from-to)22486-22495
Number of pages10
JournalOptics Express
Volume19
Issue number23
DOIs
Publication statusPublished - 7 Nov 2011
Externally publishedYes

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nonlinearity
photons
molecules
refractivity
ground state
symmetry
excitation
interference
coefficients

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Off-resonance and non-resonant dispersion of Kerr nonlinearity for symmetric molecules [Invited]. / Stegeman, George; Kuzyk, Mark G.; Papazoglou, Dimitris G.; Tzortzakis, Stylianos.

In: Optics Express, Vol. 19, No. 23, 07.11.2011, p. 22486-22495.

Research output: Contribution to journalArticle

Stegeman, George ; Kuzyk, Mark G. ; Papazoglou, Dimitris G. ; Tzortzakis, Stylianos. / Off-resonance and non-resonant dispersion of Kerr nonlinearity for symmetric molecules [Invited]. In: Optics Express. 2011 ; Vol. 19, No. 23. pp. 22486-22495.
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