Student Project Abstracts 2005 - Pluto - University of Washington

facethef therfaceding, theITOthird layer, DBR, was scanned with ITOand glass layers below it. Additional measurements with a surfaceprofiler were done to analysis theroughness Figure 7. Dynamic of the Modulation individual Measurement layers Schematic of theFabry-Perot Etalon device. Each surfaceAdditional was scanned measurements in sequence with a surface with preceding profiler were donematerial layers in place. For example, theto analysisthirdthelayer,roughnessDBR,ofwasthe individualscannedlayerswithofITOthe Fabry-Perot Etalon and glass device. layers Each below surface it. was scanned in sequence withAdditional measurements with a surfacepreceding material layers in place. For example, the third layer,profilerDBR, were done to analysis thewas scanned with ITO and glass layers below it.roughness By varyingof the the voltage individual over alayers rangeof ofthe60Fabry-Perot V, the shiftsEtalon in device. were Each observed. surfacewas Afterscanned normalizing RESULTSin sequence/ the DISCUSSION shift with wavelengths, precedingBythevaryingaveragetheshiftvoltagewasovercalculated.material layers in place. a range For example, of 60 V, the the shifts inFigure third 8 were layer, observed. DBR, After was normalizing scanned the with shift wavelengths, ITOthe average shift was calculated.and glass layers below it.By varying the voltage over a range of 60V, the shifts in were observed.After normalizing the shift wavelengths,the average shift was calculated.ExtinctionFigure measurements 9. Shift Measurement Results also showpromising results with an extinction ratioExtinction measured measurements at 5 Volts. also The show extinction promising ratio results withan extinction is theratio logmeasured ratio ofat the 5 Volts. intensity The extinction at 0 volts ratio is thelog ratio compared of the intensity to the at 0 volts intensity compared at to anthe applied intensity at anapplied voltage.4 CMDITR Review of Undergraduate Research Vol. 1 No. 1 Summer 20044 CMDITR Review of Undergraduate Research Vol. 1 No. 1 Summer 2004Figure10: Extinction Results TCBD Sol-gelExtinction measurements also showEBY promising results with an extinction ratiomeasured at 5 Volts. The extinction ratiois the Surface log ratio analysis of the of the intensity sample was at shown 0 volts to be a major factorin the performance of the device. Scans of the different deviceExtinction compared tomeasurements the intensity atalso an applied showpromising voltage.levels are results with an extinction ratioshown along with the average standard deviation values.See Figures 11,measured at 5 Volts. The extinction ratio12.By varying the voltage over a range of 60V, the shifts in were observed.After normalizing the shift wavelengths,the average shift was calculated. is the log Surface ratioanalysis of the intensity of the sample at 0 volts was showncompared to beto a the major intensity factor inat the an performance applied ofvoltage.DBRSurface analysis of the sample ITOwas shownto be a major factor in the performance ofthe device. Scans of the different Glass devicelevels are shown along with the averagestandard deviation values. See Surfacethe analysis device. of Scans the Figure sample 8: ofSurface the was Scans different shown deviceto be alevels major are factor shown in thealong performance with theofaveragethe device. standard Scans deviation of the different values. device See levels are shown along with the averageTCBD Sol-Gelstandard deviation values. See DBR 4 CMDITR Review of Undergraduate Research Vol. 1 No. 1 Summer 2004 ITOGlassSurface analysis of the sample was shownto be a major factor in the performance ofTCBD Sol-Gel DBRFigure 12. Probability Density Distribution for TCBD Sol-Gel standard ITOThe average standard deviation shown deviation below is shown the value obtainedfrom averaging Glassbelow is thethe distributionvalue obtainedof each surfacefromscan. Sixor more scans for each surface were recorded. The DBR mirroraveraging the distribution of each surfaceis the roughest surface in the device. This has implications in thescan. Six or more scans for each surfacedevice performance as the roughness can be directly tied to thewereperformancerecorded. The DBR mirror is theof the device.roughest surface in the device. This hasimplications in the device performance asthe roughness can be directly tied to theperformance of the device.SurfaceTCBD Sol-GelDBR MirrorITOGlassTCBD Sol-GelAverage Standard Deviation3.02 nm5.36 nm1.36 nm2.31 nm Table 1. Indication of Roughness from Surface Scanning of MaterialsCMDITR Review of Undergraduate Research Vol. 2 No. 1 Summer 2005 37avperPeITImmapuper1.Un2.Jou3.AnLig4.M.Jen15NaUnCo