Hyper Rayleigh Scattering - Revision history

Cmditradmin: /* Technique */

2010-06-28T17:22:25Z

Technique

← Older revision		Revision as of 10:22, 28 June 2010
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	<swf width="550" height="430">http://depts.washington.edu/cmditr/media/rayleigh.swf</swf>		<swf width="550" height="430">http://depts.washington.edu/cmditr/media/rayleigh.swf</swf>

			YouTube version:
			{{#ev:youtube\|IP1HH6giIZU}}

	Low intensity background due to two-photon excited fluorescence can be fitted to a fourth order polynomial and subtracted.		Low intensity background due to two-photon excited fluorescence can be fitted to a fourth order polynomial and subtracted.

Cmditradmin: /* Overview */

2010-01-04T23:25:44Z

Overview

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	There are a number of ways the HRS characterization method is used in non-linear optics research.		There are a number of ways the HRS characterization method is used in non-linear optics research.

	The dielectric properties of the solvent influence the β (solvatochromatism). One area of research involves predicting and solvent effects so as to better understand the performance of molecules when densely packed in materials. Attempts have been made to calibrate HRS measurements with EFISH measurements of beta though they are based on different tensor elements.		The dielectric properties of the solvent influence the β (solvatochromatism). One area of research involves predicting and solvent effects so as to better understand the performance of molecules when densely packed in materials. Attempts have been made to calibrate HRS measurements with [[Electric-field induced second-harmonic generation \| EFISH]] measurements of beta though they are based on different tensor elements.

	See Wikipedia on [http://en.wikipedia.org/wiki/Rayleigh_scattering Rayleigh Scattering]		See Wikipedia on [http://en.wikipedia.org/wiki/Rayleigh_scattering Rayleigh Scattering]

Cmditradmin: /* Technique */

2010-01-04T18:55:33Z

Technique

← Older revision		Revision as of 11:55, 4 January 2010
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	<swf width="550" height="430">http://depts.washington.edu/cmditr/media/rayleigh.swf</swf>		<swf width="550" height="430">http://depts.washington.edu/cmditr/media/rayleigh.swf</swf>

			Low intensity background due to two-photon excited fluorescence can be fitted to a fourth order polynomial and subtracted.

	At this point a number of mathematical manipulations and comparisons can be done, for example comparing the sample HRS to a known reference sample with known beta, or internal referencing of the solvent contribution of beta.		At this point a number of mathematical manipulations and comparisons can be done, for example comparing the sample HRS to a known reference sample with known beta, or internal referencing of the solvent contribution of beta.

Cmditradmin at 19:20, 29 December 2009

2009-12-29T19:20:48Z

← Older revision		Revision as of 12:20, 29 December 2009
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			<table id="toc" style="width: 100%">
			<tr>
			<td style="text-align: center; width: 33%">[[Main_Page#Research Equipment, Devices and Techniques\|Return to Research Tool Menu]]</td>

			</tr>
			</table>
	Hyper Rayleigh Scattering (aka Harmonic Light Scattering or HRS) is one method for measuring the [[first hyperpolarizability]] β.		Hyper Rayleigh Scattering (aka Harmonic Light Scattering or HRS) is one method for measuring the [[first hyperpolarizability]] β.

Cmditradmin at 19:20, 29 December 2009

2009-12-29T19:20:14Z

← Older revision		Revision as of 12:20, 29 December 2009
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	<br clear='all'>		<br clear='all'>
			[[category:Research equipment]]

Cmditradmin at 23:20, 14 December 2009

2009-12-14T23:20:24Z

← Older revision		Revision as of 16:20, 14 December 2009
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	=== Technique ===		=== Technique ===
	The HRS measurement of β is a specialized device custom-built on an optics table. A series of mirrors, filters and devices hydrogen raman cell pass a specific wavelength of light into a sample which then emits light that is selected by a [[monochromator]] and then detected with a photocell. The components and configuration can change significantly from site to site. It is important to understand the significance of each portion of the setup. One possible HRS experimental setup is described here. (Press > to Play the video)		The HRS measurement of β is a specialized device custom-built on an optics table. A series of mirrors, filters and devices [[hydrogen raman cell]] pass a specific wavelength of light into a sample which then emits light that is selected by a [[monochromator]] and then detected with a photocell. The components and configuration can change significantly from site to site. It is important to understand the significance of each portion of the setup. One possible HRS experimental setup is described here. (Press > to Play the video)

	<swf width="550" height="430">http://depts.washington.edu/cmditr/media/rayleigh.swf</swf>		<swf width="550" height="430">http://depts.washington.edu/cmditr/media/rayleigh.swf</swf>

Cmditradmin: /* Technique */

2009-12-14T23:12:38Z

Technique

← Older revision		Revision as of 16:12, 14 December 2009
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	=== Technique ===		=== Technique ===
	The HRS measurement of β is a specialized device custom-built on an optics table. The components and configuration can change ~~significant~~ from site to site. It is important to understand the significance of each portion of the setup. One possible HRS experimental setup is described here. (Press > to Play the video)		The HRS measurement of β is a specialized device custom-built on an optics table. A series of mirrors, filters and devices hydrogen raman cell pass a specific wavelength of light into a sample which then emits light that is selected by a [[monochromator]] and then detected with a photocell. The components and configuration can change significantly from site to site. It is important to understand the significance of each portion of the setup. One possible HRS experimental setup is described here. (Press > to Play the video)

	<swf width="550" height="430">http://depts.washington.edu/cmditr/media/rayleigh.swf</swf>		<swf width="550" height="430">http://depts.washington.edu/cmditr/media/rayleigh.swf</swf>

Cmditradmin at 20:09, 21 October 2009

2009-10-21T20:09:55Z

← Older revision		Revision as of 13:09, 21 October 2009
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	Hyper Rayleigh Scattering (aka Harmonic Light Scattering or HRS) is one method for measuring the [[first hyperpolarizability]]β. ~~Another method is electric field induced second harmonic generation (EFISH)~~		Hyper Rayleigh Scattering (aka Harmonic Light Scattering or HRS) is one method for measuring the [[first hyperpolarizability]] β.

	=== Overview ===		=== Overview ===

Cmditradmin: /* Overview */

2009-10-21T20:07:58Z

Overview

← Older revision		Revision as of 13:07, 21 October 2009
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	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 Clays 1992 <ref>Clays, K.; Persoons, A., Hyper-Rayleigh scattering in solution. Rev. Sci. Instrum. 1992, 63 (6), 3285-9.</ref>.
			and Goovaerts 2001 <ref>Goovaerts, E.; Wenseleers, W. E.; Garcia, M. H.; Cross, G. H., Design and characterization of organic and organometallic molecules for second order nonlinear optics. Handbook of Advanced Electronic and Photonic Materials and Devices 2001, 9, 127-191</ref>

	There are a number of ways the HRS characterization method is used in non-linear optics research.		There are a number of ways the HRS characterization method is used in non-linear optics research.

Cmditradmin: /* Overview */

2009-10-21T20:04:41Z

Overview

← Older revision		Revision as of 13:04, 21 October 2009
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	:<math>I^ {2 \omega }_{HRS} = [ (I ^ \omega_0 \cdot T ^ \omega_{solv})^2 G ] ( N_{solv} \langle \beta ^ 2 _{solv} \rangle + N_{sam} \langle \beta ^ 2 _{sam} \rangle ) \,\!</math>		:<math>I^ {2 \omega }_{HRS} = [ (I ^ \omega_0 \cdot T ^ \omega_{solv})^2 G ] ( N_{solv} \langle \beta ^ 2 _{solv} \rangle + N_{sam} \langle \beta ^ 2 _{sam} \rangle ) \,\!</math>

			where
			:<math>I ^ \omega_0\,\!</math> is the intensity of the incident field
			:<math>T ^ \omega_{solv}\,\!</math> is the transmission of the fundamental radiation for the solvent
			:<math>G\,\!</math> is the instrumental efficiency
			:<math>N\,\!</math> is the number density of the sample (sam)and solvent (solv)
			:<math>\beta^2\,\!</math> is the orientational average of the square of the first hyperpolarizability.