Stable Multi-Wavelength Resonant Metal-dielectric Hybrid Nanostructure in the Infrared Range

Year: 2025

Authors: Lu XY., Tognazzi A., Klimov V., Zadkov VN., Cino AC., De Angelis C., Xu G., Song F., Wang GB., Zhao XL., Guo S.

Autors Affiliation: Henan Med Univ, Sch Med Engn, 601 Jinsui Ave, Xinxiang 450003, Henan, Peoples R China; Henan Int Joint Lab Neural Informat Anal & Drug In, 601 Jinsui Ave, Xinxiang 450003, Henan, Peoples R China; Univ Palermo, Dept Engn, Viale Sci, I-90128 Palermo, Italy; CNR, Ist Nazl Ott, INO, Via Branze 45, I-25123 Brescia, Italy; Russian Acad Sci, PN Lebedev Phys Inst, 53 Leninsky Prospekt, Moscow 119991, Russia; Russian Acad Sci, Inst Spect, Moscow 108840, Russia; Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy; Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China; Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China; Nankai Univ, Key Lab Weak Light Nonlinear Photon, Minist Educ, Tianjin 300071, Peoples R China; Henan Med Univ, Henan Prov Engn Res Ctr Innovat Synthet Biol, Sch Life Sci & Technol, 601 Jinsui Ave, Xinxiang 453003, Henan, Peoples R China; Henan Med Univ, Sch Basic Med Sci, 601 Jinsui Ave, Xinxiang 453003, Henan, Peoples R China.

Abstract: Plasmonic nanostructures typically exhibit shifts in their resonant wavelength in response to changes in the refractive index of the surrounding medium. This limits their applications in scenarios requiring stable optical resonances. Here we present a metallic-dielectric hybrid metasurface that exhibits stable multi-wavelength resonance even if the refractive index of its surrounding varies. To quantitatively evaluate the stability of the optical response, we introduce a stability factor FS=Δn/Δλ. Here, Δn and Δλ represent variation of refractive index and shift of the resonant wavelength, respectively. A larger factor indicates better stability. The factor reaches 5 RIU/μm when silicon is employed as the central dielectric and increases to 33.3 RIU/μm when Bi2Te3 is utilized instead. The proposed innovative structure has potential applications in the development of substrates for in-vitro cell cultivation. Under broadband light illumination, it stably absorbs light at specific wavelengths, creating a consistent optical microenvironment leading to cell growth. It can find potential applications in precise control of various cellular processes, including metabolism and differentiation. It potentially brings a paradigm shift in the fields of cell based research and regenerative medicine, opening up new avenues for scientific exploration and therapeutic advancements. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.

Journal/Review: PLASMONICS

More Information: This work was supported by the China Scholarship Council (Grant Nos. 202008410575 and 202408410036) and the Henan Province Science and Technology Plan Projects (Grant No. 242102230026). A. T. acknowledges financial support from the University of Palermo through Fondo Finalizzato alla Ricerca di Ateneo 2025 (FFR2025).
KeyWords: Nanostructure; Metasurface; Plasmonic; Infrared; Biophotonics
DOI: 10.1007/s11468-025-03305-9