Publication detail

Epitaxial VO2 nanostructures: A route to large-scale, switchable dielectric metasurfaces

LIGMAJER, F. KEJÍK, L. TIWARI, U. QIU, M. NAG, J. KONEČNÝ, M. ŠIKOLA, T. JIN, W. HAGLUND, R. APPAVOO, K. LEI, D.

Original Title

Epitaxial VO2 nanostructures: A route to large-scale, switchable dielectric metasurfaces

Type

journal article in Web of Science

Language

English

Original Abstract

Metasurfaces offer unparalleled functionalities for controlling the propagation and properties of electromagnetic waves. But to transfer these functions to technological applications, it is critical to render them tunable and to enable fast control by external stimuli. In most cases, this has been realized by utilizing tunable materials combined with a top-down nanostructuring process, which is often complicated and time intensive. Here we present a novel strategy for fabricating a tunable metasurface comprising epitaxially-grown nanobeams of a phase transition material — vanadium dioxide. Without the need for extensive nano-lithographic fabrication, we prepared a large-area (>1 cm2), deep-subwavelength (thickness of ~ /40) nanostructured thin film that can control light transmission with large modulation depth — exceeding 9 dB across all telecommunication wavelength bands. Furthermore, the transmission in the “on” state remains higher than 80% from near- to mid-infrared region. This renders our metasurface useful also as a phase-shifting element, which we demonstrate by carrying out cross-polarized transmission measurements. To provide insights about the relationship between metasurface morphology and its resulting optical properties, we perform full-field three-dimensional numerical simulations as a function of width, height and edge-to-edge separation of the epitaxial VO2 nanobeams.

Keywords

vanadium dioxide; plasmonics; phase transition; near-infrared modulation; metasurfaces; metamaterials

Authors

LIGMAJER, F.; KEJÍK, L.; TIWARI, U.; QIU, M.; NAG, J.; KONEČNÝ, M.; ŠIKOLA, T.; JIN, W.; HAGLUND, R.; APPAVOO, K.; LEI, D.

Released

7. 5. 2018

ISBN

2330-4022

Periodical

ACS Photonics

Year of study

5

Number

7

State

United States of America

Pages from

2561

Pages to

2567

Pages count

7

URL

https://pubs.acs.org/doi/10.1021/acsphotonics.7b01384

BibTex

@article{BUT150507,
  author="Filip {Ligmajer} and Lukáš {Kejík} and Uddhab {Tiwari} and Meng {Qiu} and Joyeeta {Nag} and Martin {Konečný} and Tomáš {Šikola} and Wei {Jin} and Richard F. {Haglund} and Kannatassen {Appavoo} and Dang Yuan {Lei}",
  title="Epitaxial VO2 nanostructures: A route to large-scale, switchable dielectric metasurfaces",
  journal="ACS Photonics",
  year="2018",
  volume="5",
  number="7",
  pages="2561--2567",
  doi="10.1021/acsphotonics.7b01384",
  issn="2330-4022",
  url="https://pubs.acs.org/doi/10.1021/acsphotonics.7b01384"
}