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Ultrafast, broadband light polarization properties of vanadium dioxide thin films on insulating and metallic substrates

Title:

Ultrafast, broadband light polarization properties of vanadium dioxide thin films on insulating and metallic substrates

Tran, Vinh Son (2018) Ultrafast, broadband light polarization properties of vanadium dioxide thin films on insulating and metallic substrates. PhD thesis, Concordia University.

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Abstract

The refractive indices of vanadium dioxide (VO2) abruptly change when its phase transition temperature of 68oC is reached, the point at which it goes from an insulating state to a metallic state. Modifications of complex-valued refractive indices in VO2 have been shown to produce optical phase shifts that are unequal for the s- and p-components of polarization, thereby causing a relative phase shift Δ between the two. Under certain conditions of Δ, a linearly polarized light can rotate its polarization 90 degrees or transforms between linear and circular. In this thesis, we will demonstrate all possibilities of using a VO2 thin film to change the polarized light states of reflected or transmitted light on the nanosecond and potentially shorter timescales. Possible applications for high-contrast optical modulation over a wide spectral range are discussed.

Divisions:Concordia University > Faculty of Arts and Science > Physics
Item Type:Thesis (PhD)
Authors:Tran, Vinh Son
Institution:Concordia University
Degree Name:Ph. D.
Program:Physics
Date:11 October 2018
Thesis Supervisor(s):Vo-Van, Truong and Hache, Alain
ID Code:985134
Deposited By: Vinh Son Tran
Deposited On:10 Jun 2019 12:57
Last Modified:10 Jun 2019 12:57
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