Difference between revisions of "Hyper Rayleigh Scattering"
Cmditradmin (talk | contribs) m |
Cmditradmin (talk | contribs) m (→Overview) |
||
| Line 5: | Line 5: | ||
[[Image:Hrs.png|thumb|400px|Schematic of the HRS setup. CL = collimating lenses; LPF = long-pass filter; FL = 300-mm focusing lens; S = solution of chromophore in solvent of choice; DO = detection optics; IF = interference filter (950 nm)]] | [[Image:Hrs.png|thumb|400px|Schematic of the HRS setup. CL = collimating lenses; LPF = long-pass filter; FL = 300-mm focusing lens; S = solution of chromophore in solvent of choice; DO = detection optics; IF = interference filter (950 nm)]] | ||
In HRS A dilute sample of a test chromophore is prepared in a solvent. | In HRS A dilute sample of a test chromophore is prepared in a solvent. An incident laser generates a second harmonic signal, specifically the frequency double signal from excitation of the sample molecules. This can be related to the beta of the sample using this formula: | ||
:<math>\frac {I_{sample}} {I_{solvent}} = \frac {N_{sample} \langle \beta^2 _{sample} \rangle + N_{solvent} \langle \beta^2_{solvent}\rangle} {N_{solvent} \langle \beta^2_{solvent}\rangle}\,\!</math> | :<math>\frac {I_{sample}} {I_{solvent}} = \frac {N_{sample} \langle \beta^2 _{sample} \rangle + N_{solvent} \langle \beta^2_{solvent}\rangle} {N_{solvent} \langle \beta^2_{solvent}\rangle}\,\!</math> | ||
| Line 14: | Line 13: | ||
See Firestone 2004 <ref>K. A. Firestone, P. Reid, R. Lawson, S. H. Jang, and L. R. Dalton, “Advances in Organic Electro-Optic Materials and Processing,” Inorg. Chem. Acta, 357, 3957-66 (2004)</ref>. | See Firestone 2004 <ref>K. A. Firestone, P. Reid, R. Lawson, S. H. Jang, and L. R. Dalton, “Advances in Organic Electro-Optic Materials and Processing,” Inorg. Chem. Acta, 357, 3957-66 (2004)</ref>. | ||
There are a number of ways the HRS setup can use in non-linear optics research. | |||
The dielectric properties of the solvent influence the β (solvatochromatism). | |||
See Wikipedia on [http://en.wikipedia.org/wiki/Rayleigh_scattering Rayleigh Scattering] | See Wikipedia on [http://en.wikipedia.org/wiki/Rayleigh_scattering Rayleigh Scattering] | ||
Revision as of 11:29, 12 October 2009
Hyper Rayleigh Scattering (aka Harmonic Light Scattering or HRS) is one method for measuring the first hyperpolarizabilityβ. Another method is electric field induced second harmonic generation (EFISH)
Overview
In HRS A dilute sample of a test chromophore is prepared in a solvent. An incident laser generates a second harmonic signal, specifically the frequency double signal from excitation of the sample molecules. This can be related to the beta of the sample using this formula:
- <math>\frac {I_{sample}} {I_{solvent}} = \frac {N_{sample} \langle \beta^2 _{sample} \rangle + N_{solvent} \langle \beta^2_{solvent}\rangle} {N_{solvent} \langle \beta^2_{solvent}\rangle}\,\!</math>
See Firestone 2004 [1].
There are a number of ways the HRS setup can use in non-linear optics research.
The dielectric properties of the solvent influence the β (solvatochromatism).
See Wikipedia on Rayleigh Scattering
See also Density Functional Theory
See Wikipedia on Raman Scattering
Technique
Video to come
Significance
References
- ↑ K. A. Firestone, P. Reid, R. Lawson, S. H. Jang, and L. R. Dalton, “Advances in Organic Electro-Optic Materials and Processing,” Inorg. Chem. Acta, 357, 3957-66 (2004)