Silicon nanowire based angle robust ultrasensitive hyperbolic metamaterial biosensor.

ABSTRACT: We design an angle-robust hyperbolic metamaterial-based biosensor structure using n-doped silicon nanowires. We examine the hyperbolic properties of the structure using effective medium theory (EMT) and analyze the resonance shift of our proposed biosensor structure, by employing the finite-difference time domain (FDTD) method, and theoretically verify the result with the transfer matrix method (TMM). Our proposed sensor structure exhibited a perfect reflectance shift for impedance matching and extreme anisotropic properties at the NIR wavelength (λ > 2.2 μm). We analytically demonstrate the electric field confinement between nanowires by employing the resonance condition, which is enhanced by the total internal reflection (TIR) phase shift. We demonstrate that the angle-insensitive

SUBMITTER: Golder B 

PROVIDER: S-EPMC12557550 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature