Polarization modulation by vanadium dioxide on metallic substrates

OPTICS COMMUNICATIONS

卷:427

Article

Tran Vinh Son^1,2  Phuong Anh Do¹  Vo-Van Truong²  Bader, George¹  Hache, Alain¹ 

[1] Univ Moncton, Dept Phys & Astron, Moncton, NB E1A 3E9, Canada

[2] Concordia Univ, Dept Phys, Montreal, PQ H3G 1M8, Canada

关键词: Vanadium dioxide;    Phase transition material;    Polarization control;    Light modulator;    Phase control;   

DOI  :  10.1016/j.optcom.2018.07.010

来源: Elsevier

【 摘 要 】

Vanadium dioxide (VO2) undergoing phase transition is known alters the polarization state of light in reflection owing to large changes in complex refractive indices. While this effect is promising for optical modulation applications, the usual VO2 films on dielectric substrates tend to offer limited tunability for polarization modulation. In this paper, we show that metallic under-layers greatly enhance the performance by widening the spectral range and include visible wavelengths, by increasing the polarization modulation amplitude, and by widening the range of workable incidence angles. The imaginary part of the refractive index in the metallic layer is found to increase the relative phase shifts between s- and p-components of polarization as well as increasing the reflectance.

【 授权许可】

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