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Pure optical phase control with vanadium dioxide thin films
- Source :
- Optics Communications. 320:151-155
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- Under certain conditions, films made of vanadium dioxide exhibit wavelengths at which transmittance or reflectance do not change as the material undergoes insulator to metal phase transition, in spite of refractive index changes on the order of unity. Exploiting this effect, we demonstrate control of optical phase at 800 nm in transmission and at 1310 nm in reflection. With a 68 nm film, the optical phase is adjusted while leaving all other properties of light unchanged, including amplitude, polarization and frequency. The phase change per unit of propagated distance is Δk=107 rad/m, orders of magnitude higher than typically obtained with electro-optic effects. We discuss potential application to nano-sized phase devices or thin film lenses.
- Subjects :
- Phase transition
Materials science
business.industry
Physics::Optics
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Wavelength
Optics
Amplitude
Transmittance
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Thin film
business
Refractive index
Phase modulation
Group delay and phase delay
Subjects
Details
- ISSN :
- 00304018
- Volume :
- 320
- Database :
- OpenAIRE
- Journal :
- Optics Communications
- Accession number :
- edsair.doi...........a236b59c868a1713038960989db65ceb