Thermo-optical properties of <i>α</i>-MoO<sub>3</sub> thin films in the mid-infrared and phonon frequency shift
Abstract We investigate the mid-infrared thermo-optical properties of polycrystalline alpha-phase molybdenum trioxide ( α -MoO 3 ) thin films grown on fused silica substrates via pulsed laser deposition (PLD) at 500 °C. By analyzing temperature-dependent reflection spectra, we determine stable and uniquely defined MoO 3 thermo-optical constants, d n /d T and d k /d T , over a 20 °C–250 °C temperature range. Unlike films grown using other deposition techniques at room temperature and subsequently annealed, our results demonstrate that PLD enables the fabrication of reliable and thermally stable MoO 3 thin films, making them highly suitable for infrared applications, such as filters, polarizers, and sensors.
Authors
- Roberto Macaluso (ORCID: https://orcid.org/0000-0002-7612-3192)
- Federico Vittorio Lupo (ORCID: https://orcid.org/0000-0001-5761-698X)
- Alessandro Bile (ORCID: https://orcid.org/0000-0002-4112-2544)
- Koray Aydın (ORCID: https://orcid.org/0000-0002-3268-2216)
- Daniele Ceneda (ORCID: https://orcid.org/0009-0002-4893-6310)
- Maria Cristina Larciprete (ORCID: https://orcid.org/0000-0002-7876-628X)
- Marco Centini (ORCID: https://orcid.org/0000-0003-0625-0054)
- Dominique Persano Adorno (ORCID: https://orcid.org/0000-0001-7655-1114)
Institutions
- Northwestern University (US)
- Sapienza University of Rome (IT)
- University of Palermo (IT)
Publication Details
- Journal
- Journal of Physics Photonics
- Published
- 2025-03-05
- DOI
- https://doi.org/10.1088/2515-7647/adbced
- Citations
- 1
- Primary Topic
- Transition Metal Oxide Nanomaterials
- Type
- article
- Field-Weighted Citation Impact
- 0.61
Funders
- Sapienza Università di Roma