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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
Light dynamics in glass-vanadium dioxide nanocomposite waveguides with thermal nonlinearity
Yaroslav V Kartashov1, Victor A Vysloukh
1ICFO-Institut de Ciencies Fotoniques and Universitat Politecnica de Catalunya, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain. yaroslav.kartashov@icfo.es
Optics Letters
|April 17, 2009
Summary
Silicon dioxide-vanadium dioxide nanocomposite waveguides exhibit optical limiting. The semiconductor-to-metal phase transition in vanadium dioxide nanoparticles induces significant changes in optical properties, enabling this effect in the near-infrared spectrum.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Thermo-optical nonlinearity in materials is crucial for advanced optical devices.
- Vanadium dioxide (VO2) nanoparticles exhibit a semiconductor-to-metal phase transition with significant optical property changes.
- Silicon dioxide (SiO2) is a common host material for nanocomposites.
Purpose of the Study:
- To investigate laser beam propagation in SiO2-VO2 nanocomposite waveguides.
- To explore the potential of VO2's phase transition for optical limiting applications.
- To analyze the influence of thermo-optical nonlinearity on waveguide behavior.
Main Methods:
- Theoretical analysis of laser beam propagation in nonlinear optical waveguides.
- Modeling the optical properties of SiO2-VO2 nanocomposites, considering VO2 phase transitions.
- Simulating the effects of absorption coefficient and refractive index modifications.
Main Results:
- Demonstrated optical limiting in SiO2-VO2 nanocomposite waveguides in the near-infrared (near-IR) range.
- Observed significant modifications in the absorption coefficient of VO2 nanoparticles during the phase transition.
- Noted substantial changes in the refractive index of VO2 nanoparticles correlating with the phase transition.
Conclusions:
- SiO2-VO2 nanocomposites are promising for developing optical limiting devices.
- The thermo-optical nonlinearity and phase transition of VO2 are key mechanisms for optical limiting.
- Further research can optimize these nanocomposites for specific near-IR applications.
