Ultrafast optical dynamics in VO<sub>2</sub>

S. Lysenko; V. Vikhnin; G. Zhang; A. Rua; F. Fernandez; H. Liu

doi:10.1117/12.658811

6 April 2006 Ultrafast optical dynamics in VO₂

S. Lysenko, V. Vikhnin, G. Zhang, A. Rua, F. Fernandez, H. Liu

Proceedings Volume 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics; 61701R (2006) https://doi.org/10.1117/12.658811
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

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.

Citation Download Citation

S. Lysenko, V. Vikhnin, G. Zhang, A. Rua, F. Fernandez, and H. Liu "Ultrafast optical dynamics in VO₂", Proc. SPIE 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics, 61701R (6 April 2006); https://doi.org/10.1117/12.658811

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available