Abstract
The lossy mode resonance (LMR) phenomenon is almost exclusively limited to fiber optics, since the thin film configuration yields a relatively shallow resonance dip compared to its fiber counterpart. In this Letter, we bridge this frustrating intensity gap between these basic configurations by choosing vacuum-deposited metallic indium-rich indium tin oxide as the coating material. LMR attenuation as high as -14.3dB for transverse electric and -6.4dB for transverse magnetic polarization is achieved experimentally via a commonly used Kretschmann-Raether geometry and that too for a film thickness of ≈70nm. Such a high degree of LMR response is attributed to the metallic indium generated interbands, leading to a high extinction coefficient in the visible range. A modified transfer matrix method, which takes into account the surface roughness of the films through application of the anisotropic Bruggeman effective medium approximation, is developed to realize the experimental LMR spectra numerically.
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