4.6 Article

Optical nonlinearity and structural dynamics of VO2 films

Journal

JOURNAL OF APPLIED PHYSICS
Volume 105, Issue 4, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.3078141

Keywords

high-speed optical techniques; light reflection; light scattering; metal-insulator transition; nonlinear optical susceptibility; permittivity; thin films; vanadium compounds

Ask authors/readers for more resources

The degenerate-four-wave-mixing, ultrafast optical pump-probe reflection, and scattering techniques were applied to study the nonlinear optical properties of VO2 in insulating and metallic phases. The third-order nonlinear susceptibility was measured for thin films at different excitation regimes. The VO2 recovery dynamics after light-induced phase transition (PT) shows strong sensitivity to optical pump energy and could be governed by pure electronic relaxation excluding thermal contribution at sufficiently low excitation. Increased light scattering during thermally and light-induced PT demonstrates significant VO2 heterogeneity which appears as a coexistence of insulating and metallic phases accompanied by fluctuations of dielectric constants. Different desorption activity was monitored for insulating and metallic VO2 thin solid films under femtosecond optical excitation.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available