Second-order Material Characterization - Revision history

Cmditradmin: /* Characterization */

2010-08-09T18:01:39Z

Characterization

← Older revision		Revision as of 11:01, 9 August 2010
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	[[Hyper Rayleigh Scattering]]		[[Hyper Rayleigh Scattering]]

	[[Teng-Mann Method]		[[Teng-Mann Method]]

	[[Attenuated_Total_Reflectance]]		[[Attenuated_Total_Reflectance]]

Cmditradmin: /* Characterization */

2010-08-09T18:01:22Z

Characterization

← Older revision		Revision as of 11:01, 9 August 2010
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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.		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]]		[[Hyper Rayleigh Scattering]]

	~~===~~Teng-Mann Method ~~for Measuring Electro-optic coefficient===~~		[[Teng-Mann Method]

	[[~~Teng-Mann Method~~]]		[[Attenuated_Total_Reflectance]]
	[[category:second order NLO]]		[[category:second order NLO]]
	<table id="toc" style="width: 100%">		<table id="toc" style="width: 100%">

Cmditradmin: /* Teng-Mann Method for Measuring Electro-optic coefficient */

2010-01-04T23:08:53Z

Teng-Mann Method for Measuring Electro-optic coefficient

← Older revision		Revision as of 16:08, 4 January 2010
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	===Teng-Mann Method for Measuring Electro-optic coefficient===		===Teng-Mann Method for Measuring Electro-optic coefficient===

	[[Teng-Mann Method ~~for Measuring Electro-optic coefficient~~]]		[[Teng-Mann Method]]
	[[category:second order NLO]]		[[category:second order NLO]]
	<table id="toc" style="width: 100%">		<table id="toc" style="width: 100%">

Cmditradmin at 20:22, 29 December 2009

2009-12-29T20:22:31Z

← Older revision		Revision as of 13:22, 29 December 2009
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	[[Teng-Mann Method for Measuring Electro-optic coefficient]]		[[Teng-Mann Method for Measuring Electro-optic coefficient]]
			[[category:second order NLO]]
	<table id="toc" style="width: 100%">		<table id="toc" style="width: 100%">
	<tr>		<tr>

128.95.39.42: /* Hyper Rayleigh Scattering (HRS) */

2009-10-01T16:34:32Z

Hyper Rayleigh Scattering (HRS)

← Older revision		Revision as of 09:34, 1 October 2009
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	[[Hyper Rayleigh Scattering]]		[[Hyper Rayleigh Scattering]]

			===Teng-Mann Method for Measuring Electro-optic coefficient===

	[[Teng-Mann Method for Measuring Electro-optic coefficient]]		[[Teng-Mann Method for Measuring Electro-optic coefficient]]

128.95.39.42: /* Hyper Rayleigh Scattering (HRS) */

2009-10-01T16:32:23Z

Hyper Rayleigh Scattering (HRS)

← Older revision		Revision as of 09:32, 1 October 2009
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	=== Hyper Rayleigh Scattering (HRS) ===		=== Hyper Rayleigh Scattering (HRS) ===
			[[Hyper Rayleigh Scattering]]

128.95.39.42 at 16:31, 1 October 2009

2009-10-01T16:31:53Z

← Older revision		Revision as of 09:31, 1 October 2009
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	=== Hyper Rayleigh Scattering (HRS) ===		=== Hyper Rayleigh Scattering (HRS) ===

	~~Hyper Rayleigh Scattering (aka Harmonic Light Scattering) is one method for measuring β.~~

	~~[[Image:Hrs.png\|thumb\|300px\|The Hyper Rayleigh Scattering - Test best schematic]]~~

	~~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}} = \frac {N_{sample} \langle \beta^2 _{sample} \rangle + N_{solvent} \langle \beta^2_{solvent}\rangle} {N_{solvent} \langle \beta^2_{solvent}\rangle}\,\!</math>

	~~[[Image:Tcp1_chcl3.png\|thumb\|300px\|HRS spectrum for 1.5 μm TCP1 in CHCl<sub>3</sub>]]~~

	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 also [[Density Functional Theory]]~~
	~~<br clear='all'>~~

	[[Teng-Mann Method for Measuring Electro-optic coefficient]]		[[Teng-Mann Method for Measuring Electro-optic coefficient]]

128.95.39.42: /* Hyper Rayleigh Scattering (HRS) */

2009-10-01T16:30:56Z

Hyper Rayleigh Scattering (HRS)

← Older revision		Revision as of 09:30, 1 October 2009
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	<br clear='all'>		<br clear='all'>

			[[Teng-Mann Method for Measuring Electro-optic coefficient]]

	<table id="toc" style="width: 100%">		<table id="toc" style="width: 100%">

128.95.39.42: /* Electro-optic coefficient measurements */

2009-10-01T16:29:12Z

Electro-optic coefficient measurements

← Older revision		Revision as of 09:29, 1 October 2009
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	<br clear='all'>		<br clear='all'>

	~~=== Electro-optic coefficient measurements ===~~
	~~[[Image:Tang_mann_r33.png\|thumb\|400px\|Teng-Man Testing configuration]]~~
	~~We use the Teng - Man method to measure R<sub>33</sub>.~~
	R<sub>33</sub> is an elipsometric measurement. You apply a voltage to the film while making the elipsometric measurements and looking for changes in the signal. You have to be careful with the kind of glass and the kind of tin oxide that is used. These measurements are made with the materials in a device configuration. The formula for R<sub>33</sub>

	~~:<math>r_{33}= \frac {3\lambda I_m (n^2 - sin^2 \theta) ^{1/2}} {4 \pi V_{poly}I_c n^2 sin^2 \theta}~~
	~~\,\!</math>~~
	~~where~~

	~~:<math>I_m\,\!</math> is the amplitude of modulation~~
	~~:<math>V_{poly}\,\!</math> is the modulation voltage across EO polymer~~
	~~:<math>I_c\,\!</math> is the half intensity point~~
	~~:<math>n\,\!</math> is the refractive index of the polymer~~

	~~and~~

	~~:<math>V_{poly}= V_{ACtot} \frac {d_{poly}} {d_{poly} + d_{clad}} \cdot \sqrt {\frac {\epsilon_{clad}} {\epsilon _{poly}}}\,\!</math>~~



	~~See Khanarian 1996 <ref>Khanarian, et. al., JOSA B13, 1927 (1996)</ref>~~

	~~See STC-MDITR research project 1.1 [http://stc-mditr.org/research/oeoaomd/projects/1.111.cfm Measuring R33 with Interferometry]~~

Cmditradmin at 23:38, 9 September 2009

2009-09-09T23:38:49Z

← Older revision		Revision as of 16:38, 9 September 2009
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	<table id="toc" style="width: 100%">		<table id="toc" style="width: 100%">
	<tr>		<tr>
	<td style="text-align: left; width: 33%">[[~~Second-order Material Design~~\|Previous Topic]]</td>		<td style="text-align: left; width: 33%">[[Terahertz Radiation\|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: 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>~~
	</tr>		</tr>
	</table>		</table>
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	<table id="toc" style="width: 100%">		<table id="toc" style="width: 100%">
	<tr>		<tr>
	<td style="text-align: left; width: 33%">[[~~Second-order Material Design~~\|Previous Topic]]</td>		<td style="text-align: left; width: 33%">[[Terahertz Radiation\|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: 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>~~
	</tr>		</tr>
	</table>		</table>