2025
Кучмижак А. А., Павлов Д. В., Шевлягин А. В., Хаосинь Чжоу, А.Г. Козлов, Шулян Доу, Яо Ли
Journal of Physical Chemistry Letters, Q1
Dmitry V. Pavlov, Haoxin Zhou, Aleksei G. Kozlov, Aleksandr V. Shevlyagin, Shuliang Dou, Yao Li, Aleksandr A. Kuchmizhak / Anisotropic Vanadium Dioxide Nanogratings by Direct Laser-Induced Periodic Surface Structuring (LIPSS) // J. Phys. Chem. Lett. - Vol. 16. - Iss. 20. - 2025. - pp. 4969-4974
Статьи в журналах
Thermochromic vanadium dioxide (VO2) films have attracted enormous attention in the past decade owing to their high potential in active optical filters, sensors, anevices. VO2 patterned at the micro- and nanoscale is an evident route toward next-generation devices justifying the need for scalable, straightforward, and high-performing nanofabrication technologies being easily applied for this material. Herein, precise and nondestructive femtosecond laser nanopatterning of the VO2 films in both direct ablation and plasmon-assisted self-organization regimes is reported under ambient conditions. Our studies unveil formation of the spatially uniform subwavelength nanogratings (or laser-induced periodic surface structures) with a periodicity of around 100 nm through optical excitation and interference of the surface plasmons in the VO2 film upon its multipulse irradiation. Plasmon-assisted nanotexturing preserves pristine composition of the film, strongly modulating its optical properties toward enhanced visible-range transmittance and evident thermochromic anisotropy in the near-IR spectral range. Overall, our study not only sheds light onto the origin of the laser-driven self-organization in the VO2 films, but also unveils huge potential of scalable nondestructive direct fs-laser patterning for creating novel optoelectronic and sensing devices based on the optically anisotropic nanotextured VO2 films.
Volume 16, Issue 20, 12 May 2025, pp. 4969–4974
https://doi.org/10.1021/acs.jpclett.5c00871