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NLO: NonLinear optics (Read 1938 times)
Gerrit-Jan Linker
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NLO: NonLinear optics
17.12.12 at 12:54:11
NLO: NonLinear optics
Nonlinear optics (NLO) is the branch of optics that describes the behavior of light in nonlinear media, that is, media in which the dielectric polarization P responds nonlinearly to the electric field E of the light. This nonlinearity is typically only observed at high light intensities.
The dipole of a molecule in dependence of an applied field E:
μ(E)=μ0 + βE2 + γE3/6 + ...
β=first hyperpolarisability
γ=second hyperpolarisability
The macroscopic polarisation of a solid in dependence of an applied field E:
P(E)=P0 + χ(1)E + χ(2)E2 + χ(3)E3 + ...
χ(2)= second-order nonlinear susceptibility
χ(3)= third-order nonlinear susceptibility
See also:
SHG: Second Harmonic Generation
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« Last Edit: 17.12.12 at 13:14:26 by Gerrit-Jan Linker »  

Gerrit-Jan Linker
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