Thermally switchable terahertz wavefront metasurface modulators based on the insulator-to-metal transition of vanadium dioxide - Forschungsportal der Justus-Liebig-Universität Gießen:

Journalartikel

Thermally switchable terahertz wavefront metasurface modulators based on the insulator-to-metal transition of vanadium dioxide

Autorenliste: Wang, Teng; He, Jinwen; Guo, Jinying; Wang, Xinke; Feng, Shengfei; Kuhl, Florian; Becker, Martin; Polity, Angelika; Klar, Peter J.; Zhang, Yan

Jahr der Veröffentlichung: 2019

Seiten: 20347-20357

Zeitschrift: Optics Express

Bandnummer: 27

Heftnummer: 15

ISSN: 1094-4087

Open Access Status: Gold

DOI Link: https://doi.org/10.1364/OE.27.020347

Verlag: Optica Publishing Group

Abstract:
Active use of phase transition phenomena for reversibly tuning the properties of functional materials in devices currently is an attractive research area of materials science. We designed and fabricated two kinds of metasurface modulators for dynamically controlling the wavefront of terahertz (THz) radiation based on the temperature-induced insulator-tometal phase transition of vanadium dioxide (VO2). The modulators designed are based on the C-shaped slot antenna array. The slot antennas are made of the VO2 films on c-sapphire substrates. The C-shaped slot antennas are active only when the VO2 is in its metallic phase, i.e. at temperatures T > T-C similar to 68 degrees C. At T > T-C. the first kind acts as a THz multi-focus lens which converges an incident THz plane wave into four focal spots and the second kind as an Airy beam generator. We characterized the function of two THz wavefront modulators over a broad frequency range, i.e. from 0.3 to 1.2 THz. Such thermally switchable THz wavefront metasurface modulators with a capability of dynamically steering THz fields will be of great significance for the future development of THz active devices. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Zitierstile

Harvard-Zitierstil: Wang, T., He, J., Guo, J., Wang, X., Feng, S., Kuhl, F., et al. (2019) Thermally switchable terahertz wavefront metasurface modulators based on the insulator-to-metal transition of vanadium dioxide, Optics Express, 27(15), pp. 20347-20357. https://doi.org/10.1364/OE.27.020347

APA-Zitierstil: Wang, T., He, J., Guo, J., Wang, X., Feng, S., Kuhl, F., Becker, M., Polity, A., Klar, P., & Zhang, Y. (2019). Thermally switchable terahertz wavefront metasurface modulators based on the insulator-to-metal transition of vanadium dioxide. Optics Express. 27(15), 20347-20357. https://doi.org/10.1364/OE.27.020347

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