Thermally switching between perfect absorber and asymmetric transmission in vanadium dioxide-assisted metamaterials

In this paper, we propose a switchable bi-functional metamaterial device based on a hybrid gold-vanadium dioxide (VO ) nanostructure. Utilizing the property of a metal-to-insulator transition in VO , perfect absorption and asymmetric transmission (AT) can be thermally switched for circularly polariz...

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Veröffentlicht in:Optics express 2021-03, Vol.29 (5), p.7666-7679
Hauptverfasser: Ren, Yi, Zhou, Tianle, Jiang, Chun, Tang, Bin
Format: Artikel
Sprache:eng
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Zusammenfassung:In this paper, we propose a switchable bi-functional metamaterial device based on a hybrid gold-vanadium dioxide (VO ) nanostructure. Utilizing the property of a metal-to-insulator transition in VO , perfect absorption and asymmetric transmission (AT) can be thermally switched for circularly polarized light in the near-infrared region. When VO is in the metallic state, the designed metamaterial device behaves as a chiral-selective plasmonic perfect absorber, which can result in an optical circular dichroism (CD) response with a maximum value ∼ 0.7. When VO is in the insulating state, the proposed metamaterial device exhibits a dual-band AT effect. The combined hybridization model and electromagnetic field distributions are presented to explain the physical mechanisms of chiral-selective perfect absorption and AT effect, respectively. The influences of structure parameters on CD response and AT effect are also discussed. Moreover, the proposed switchable bi-functional device is robust against the incident angle for obtaining perfect absorption and strong CD response as well as the AT effect. Our work may provide a promising path for the development of multifunctional optoelectronic devices, such as thermal emitters, optical modulators, CD spectroscopy, optical isolator, etc.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.418273