The development of mid-infrared nanophotonics relies on the availability of new materials combining metal- and insulator-like optical features. We systematically studied the phase transition of thermochromic vanadium dioxide (VO2) using substitutional tungsten doping at room temperature. Our results reveal that vanadium dioxide thin films, doped with tungsten and grown via pulsed laser deposition techniques on sapphire substrates, can be precisely engineered to exhibit tailored infrared phonon and plasmon polaritonic responses. By controlling the extent of tungsten concentration, starting from VO2-WO3 cold-pressed powder targets, we demonstrate the ability to continuously adjust both the amplitude and frequency of optical phonon resonances. Furthermore, we observe tunable free-electron response due to varying tungsten concentrations. The adopted fabrication technique makes it possible to create multilayer structures by alternating layers with different concentrations of tungsten. Our results pave the way for the development of tunable mid-infrared metamaterial devices operating at room-temperature.

Bile, A., Ceneda, D., Maryam, V.E.S., Scirè, D., Buscarino, G., Mosca, M., et al. (2024). Room-Temperature Tuning of Mid-Infrared Optical Phonons and Plasmons in W-doped VO2 thin films. OPTICAL MATERIALS, 154 [10.1016/j.optmat.2024.115732].

Room-Temperature Tuning of Mid-Infrared Optical Phonons and Plasmons in W-doped VO2 thin films

Scirè, Daniele;Buscarino, Gianpiero;Mosca, Mauro;Adorno, Dominique Persano;Macaluso, Roberto;
2024-08-01

Abstract

The development of mid-infrared nanophotonics relies on the availability of new materials combining metal- and insulator-like optical features. We systematically studied the phase transition of thermochromic vanadium dioxide (VO2) using substitutional tungsten doping at room temperature. Our results reveal that vanadium dioxide thin films, doped with tungsten and grown via pulsed laser deposition techniques on sapphire substrates, can be precisely engineered to exhibit tailored infrared phonon and plasmon polaritonic responses. By controlling the extent of tungsten concentration, starting from VO2-WO3 cold-pressed powder targets, we demonstrate the ability to continuously adjust both the amplitude and frequency of optical phonon resonances. Furthermore, we observe tunable free-electron response due to varying tungsten concentrations. The adopted fabrication technique makes it possible to create multilayer structures by alternating layers with different concentrations of tungsten. Our results pave the way for the development of tunable mid-infrared metamaterial devices operating at room-temperature.
ago-2024
Bile, A., Ceneda, D., Maryam, V.E.S., Scirè, D., Buscarino, G., Mosca, M., et al. (2024). Room-Temperature Tuning of Mid-Infrared Optical Phonons and Plasmons in W-doped VO2 thin films. OPTICAL MATERIALS, 154 [10.1016/j.optmat.2024.115732].
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0925346724009157-main (1).pdf

accesso aperto

Tipologia: Versione Editoriale
Dimensione 4.84 MB
Formato Adobe PDF
4.84 MB Adobe PDF Visualizza/Apri
supplementar data.pdf

Solo gestori archvio

Tipologia: Altro materiale (es. dati della ricerca)
Dimensione 872.93 kB
Formato Adobe PDF
872.93 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/645613
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact