Original ResearchPublished 25 September 2026Enhanced aqueous refractive index sensing using an AlSb/BiFeO 3 /AlSb multilayer-integrated surface plasmon resonance platformM. Jagadeeswar Goud · V. Kumar Koushik · Yesudasu Vasimalla · Bhishma Karki · Santosh KumarFrontiers in Materialsdoi 10.3389/fmats.2026.1922895