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Overview of the Conductivity Problem of BCOGs Early Results for BCOGs

Overview of the Conductivity Problem of BCOGs Early Results for BCOGs. Note that conductivity limits maximum poling field. Should have achieved 560 pm/V rather than 327 pm/V!. Interface Engineering to Improve Poling Efficiency . r 33 : 250 pm/V.

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Overview of the Conductivity Problem of BCOGs Early Results for BCOGs

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  1. Overview of the Conductivity Problem of BCOGs Early Results for BCOGs Note that conductivity limits maximum poling field. Should have achieved 560 pm/V rather than 327 pm/V!

  2. Interface Engineering to Improve Poling Efficiency r33: 250 pm/V Comparable EO activity with lowered current by changing electrode polarity r33: 280 pm/V Improved EO activity with lowered current by using a suitable buffer layer r33: 350 pm/V

  3. Warren Herman, March 2008 DARPA MORPH Review Summary: r33 for Huntsville NLO films at 1320 nm TiO2 No Buffer Values that are not bold were calculated from the relative SHG generated at that location compared to the location with the measured r33 SiO2 *Bold values were measured by ATR

  4. Using TiOx-Modified ITO Substrates to Improve Poling Efficiency of AJ-CKL1 Polymer With TiOx, Peak current reduced by 20x in magnitude • Sol-gel-derived TiOx layer • Low surface roughness • High dielectric constant • High conductivity Improved poling efficiency; good dielectric strength; with the maximum achievable r33 values ~30% higher.

  5. Model System Study by Dalton Group in PMMA. TiO2 Buffer Layer results in improvement in the ratio r33/Ep and in the maximum achievable poling voltae With TiOx, Peak current reduced by 20x in magnitude

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