Continuous Tuning of W-doped VO2 Optical Properties for Terahertz Analog Applications

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dc.contributor.authorKaraoglan-Bebek, Gulten
dc.contributor.authorHoque, M. N. F.
dc.contributor.authorHoltz, Mark
dc.contributor.authorFan, Zhaoyang
dc.contributor.authorBernussi, Ayrton
dc.date.accessioned2019-05-20T18:08:41Z
dc.date.available2019-05-20T18:08:41Z
dc.date.issued2014-11-17
dc.description.abstractVanadium dioxide (VO2), with its characteristic metal-insulator phase transition, is a prospective active candidate to realize tunable optical devices operating at terahertz (THz) frequencies. However, the abrupt phase transition restricts its practical use in analog-like continuous applications. Incorporation of tungsten is a feasible approach to alter the phase transition properties of thin VO2 films. We show that amplitude THz modulation depth of ~65%, characteristic phase transition temperature of ~40 0C, and tuning range larger than 35 0C can be achieved with W-doped VO2 films grown on sapphire substrates. W-doped VO2 films can also be used to suppress Fabry-Perot resonances at THz frequencies but at temperatures much lower than that observed for undoped VO2 films. The gradual phase transition temperature window allows for precise control of the W-doped VO2 optical properties for future analog based THz devices.
dc.description.departmentPhysics
dc.formatText
dc.format.extent5 pages
dc.format.medium1 file (.pdf)
dc.identifier.citationKaraoglan-Bebek, G., Hoque, M. N. F., Holtz, M., Fan, Z., & Bernussi, A. A. (2014). Continuous tuning of W-doped VO2 optical properties for terahertz analog applications. Applied Physics Letters, 105(20).
dc.identifier.doihttps://doi.org/10.1063/1.4902056
dc.identifier.urihttps://hdl.handle.net/10877/8199
dc.language.isoen
dc.publisherAmerican Institute of Physics
dc.sourceApplied Physics Letters, 2014, Vol. 105, No. 20.
dc.subjectvanadium dioxide
dc.subjecttransition metals
dc.subjectoptical resonators
dc.subjectoptical devices
dc.subjectphase transitions
dc.subjectoptical properties
dc.subjectfrequency spectrum
dc.subjectPhysics
dc.titleContinuous Tuning of W-doped VO2 Optical Properties for Terahertz Analog Applications
dc.typeArticle

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