Share Email Print
cover

Proceedings Paper

Ultrafast optical dynamics in VO2
Author(s): S. Lysenko; V. Vikhnin; G. Zhang; A. Rua; F. Fernandez; H. Liu
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Transient reflection spectroscopy and degenerate four wave mixing technique were employed to study the light-induced insulator-to-metal phase transition (PT) and ultrafast relaxation dynamics in VO2. Spectral reflectivity during light- and thermally-induced PT shows close proximity in the relative change. The relaxation dynamics is strongly dependent on the film morphology, laser pump energy and substrate material. After light-induced PT the recovery time demonstrates a near-exponential dependence on the pump power. The recovery owing to cooling is considerably faster for VO2 films deposited on single-crystal Al2O3 or MgO substrates compare to VO2 on amorphous glass. The noticeable transient nonlinear optical response of metallic VO2 was observed and interpreted in terms of electronic-polaron and hole-polaron clustering.

Paper Details

Date Published: 6 April 2006
PDF: 11 pages
Proc. SPIE 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics, 61701R (6 April 2006); doi: 10.1117/12.658811
Show Author Affiliations
S. Lysenko, Univ. of Puerto Rico (United States)
V. Vikhnin, Univ. of Puerto Rico (United States)
G. Zhang, Univ. of Puerto Rico (United States)
A. Rua, Univ. of Puerto Rico (United States)
F. Fernandez, Univ. of Puerto Rico (United States)
H. Liu, Univ. of Puerto Rico (United States)


Published in SPIE Proceedings Vol. 6170:
Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics
William D. Armstrong, Editor(s)

© SPIE. Terms of Use
Back to Top