Detail publikace

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.

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Vydáno

7. 5. 2018

ISSN

2330-4022

Periodikum

ACS Photonics

Ročník

5

Číslo

7

Stát

Spojené státy americké

Strany od

2561

Strany do

2567

Strany počet

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"
}