Room-temperature tuning of mid-infrared optical phonons and plasmons in W-doped VO2 thin films

Alessandro Bile; Daniele Ceneda; Vaghefi Esfidani S. Maryam; Daniele Scirè; Gianpiero Buscarino; Mauro Mosca; Dominique Persano Adorno; Roberto Macaluso; Roberto Li Voti; Concita Sibilia; Thomas G. Folland; Koray Aydin; Marco Centini; Maria Cristina Larciprete

doi:10.1016/j.optmat.2024.115732

Room-temperature tuning of mid-infrared optical phonons and plasmons in W-doped VO₂ thin films

Alessandro Bile, Daniele Ceneda, Vaghefi Esfidani S. Maryam, Daniele Scirè, Gianpiero Buscarino, Mauro Mosca, Dominique Persano Adorno, Roberto Macaluso, Roberto Li Voti, Concita Sibilia, Thomas G. Folland, Koray Aydin, Marco Centini, Maria Cristina Larciprete^*

^*Corresponding author for this work

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

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.

Original language	English (US)
Article number	115732
Journal	Optical Materials
Volume	154
DOIs	https://doi.org/10.1016/j.optmat.2024.115732
State	Published - Aug 2024

Funding

K.A. and M.C.L. acknowledge Accordi Bilaterali Interuniversitari 2022 program from Sapienza University (Prot. AI2620PAR2, Bando Professori Visitatori 2022). K.A. acknowledges partial support from the Air Force Office of Scientific Research under award number FA9550-22-1-0300. The work was financed by the European Union\u2014NextGenerationEU (Bando PRIN 2022, Directorial Decree n. 104\u2014February 02, 2022, Project code: 2022ZRN4LX). The opinions expressed are those of the authors only and should not be considered representative of the European Union or the European Commission\u2019s official position. Neither the European Union nor the European Commission can be held responsible for them. K.A. and M.C.L. acknowledge Accordi Bilaterali Interuniversitari 2022 program from Sapienza University (Prot. AI2620PAR2, Bando Professori Visitatori 2022). K.A. acknowledges partial support from the Air Force Office of Scientific Research under award number FA9550-22-1-0300. The work was financed by the European Union\u2014NextGenerationEU (Bando PRIN 2022, Directorial Decree n. 104\u2014February 02, 2022, Project code: 2022ZRN4LX). The opinions expressed are those of the authors only and should not be considered representative of the European Union or the European Commission's official position. Neither the European Union nor the European Commission can be held responsible for them.

Keywords

Mid-IR photonics
Phase-change materials
Phonon resonance tuning
Pulsed laser deposition
Thermochromics
Vanadium dioxide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

Access to Document

10.1016/j.optmat.2024.115732

Cite this

Bile, A., Ceneda, D., Maryam, V. E. S., Scirè, D., Buscarino, G., Mosca, M., Adorno, D. P., Macaluso, R., Voti, R. L., Sibilia, C., Folland, T. G., Aydin, K., Centini, M., & Larciprete, M. C. (2024). Room-temperature tuning of mid-infrared optical phonons and plasmons in W-doped VO₂ thin films. Optical Materials, 154, Article 115732. https://doi.org/10.1016/j.optmat.2024.115732

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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.",

keywords = "Mid-IR photonics, Phase-change materials, Phonon resonance tuning, Pulsed laser deposition, Thermochromics, Vanadium dioxide",

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AU - Scirè, Daniele

AU - Buscarino, Gianpiero

AU - Mosca, Mauro

AU - Adorno, Dominique Persano

AU - Macaluso, Roberto

AU - Voti, Roberto Li

AU - Sibilia, Concita

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AU - Aydin, Koray

AU - Centini, Marco

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AB - 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.

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