Difference between revisions of "Second-order Material Characterization"
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<td style="text-align: left; width: 33%">[[Second-order NLO Materials|Previous Topic]]</td> | |||
<td style="text-align: center; width: 33%">[[Main_Page#Second-order Processes, Materials & Characterization |Return to Second-order Processes, Materials & Characterization Menu]]</td> | |||
<td style="text-align: right; width: 33%">[[THz Polymers| Next Topic]]</td> | |||
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β, the first nonlinear polarizability depends on molecular structure, environment and measurement frequency. There are several tools that help us characterize the materials. | |||
Hyper Rayleigh Scattering (HRS) | |||
Hyper Rayleigh Scattering (aka Harmonic Light Scattering) is one method for measuring β. | |||
An incident laser generates a second harmonic signal, specifically the frequency double signal. This can be related to the beta of the sample using this formula: | |||
:<math>\frac I_{sample} I_{solvent} = {N_{sample} \langle \beta^2 _{sample} \rangle + N_{solvent} \rangle \beta^2_{solvent}} {N_{solvent} \rangle \beta^2_{solvent}}\,\!</math> | |||
See also [[Density Functional Theory]] | |||
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Revision as of 14:41, 18 August 2009
| Previous Topic | Return to Second-order Processes, Materials & Characterization Menu | Next Topic |
β, the first nonlinear polarizability depends on molecular structure, environment and measurement frequency. There are several tools that help us characterize the materials. Hyper Rayleigh Scattering (HRS) Hyper Rayleigh Scattering (aka Harmonic Light Scattering) is one method for measuring β.
An incident laser generates a second harmonic signal, specifically the frequency double signal. This can be related to the beta of the sample using this formula:
- <math>\frac I_{sample} I_{solvent} = {N_{sample} \langle \beta^2 _{sample} \rangle + N_{solvent} \rangle \beta^2_{solvent}} {N_{solvent} \rangle \beta^2_{solvent}}\,\!</math>
See also Density Functional Theory
| Previous Topic | Return to Second-order Processes, Materials & Characterization Menu | Next Topic |