Scholarlink

<p>Brillouin oscillations associated with the reflection of light from a traveling acoustic wave in glass have been analyzed theoretically and experimentally. An ultrahigh-frequency acoustic wave is generated by irradiating a metasurface with a femtosecond laser pulse, which is a nanostructured optically thick (6–7 skin layers) nickel film on a glass substrate. The metasurface is a disordered ensemble of subwavelength spherical nanoantennas embedded in a film with a hollow gap. By significantly increasing the transmittance of the metafilm, nanoantennas make it possible to observe Brillouin oscillations through it. For the first time to the best of our knowledge, the phase of Brillouin oscillations generated by the metamaterial has been correctly determined by hybrid hydrodynamic and electrodynamic numerical simulation, and the relationship between the phase of Brillouin oscillations and the morphology of the metafilm has been established. This work is at the intersection of nanophotonics, plasmonics, and optoacoustics and is of interest to a wide range of specialists due to the prospects for using the described effects in active metadevices and highly sensitive sensors.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Simulation of Brillouin Oscillations Generated by a Metamaterial Based on a Nanostructured Nickel Film

  • 期刊论文

  • 发表日期：

    2026年2月1日

查看全文
  • A. V. Dyshlyuk,
  • S. A. Romashevskiy,
  • Yu. V. Petrov,
  • V. A. Khokhlov,
  • O. B. Vitrik,
  • N. A. Inogamov

摘要

Brillouin oscillations associated with the reflection of light from a traveling acoustic wave in glass have been analyzed theoretically and experimentally. An ultrahigh-frequency acoustic wave is generated by irradiating a metasurface with a femtosecond laser pulse, which is a nanostructured optically thick (6–7 skin layers) nickel film on a glass substrate. The metasurface is a disordered ensemble of subwavelength spherical nanoantennas embedded in a film with a hollow gap. By significantly increasing the transmittance of the metafilm, nanoantennas make it possible to observe Brillouin oscillations through it. For the first time to the best of our knowledge, the phase of Brillouin oscillations generated by the metamaterial has been correctly determined by hybrid hydrodynamic and electrodynamic numerical simulation, and the relationship between the phase of Brillouin oscillations and the morphology of the metafilm has been established. This work is at the intersection of nanophotonics, plasmonics, and optoacoustics and is of interest to a wide range of specialists due to the prospects for using the described effects in active metadevices and highly sensitive sensors.