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Material platform for realization of a “fiber-like” lossy mode resonance response in a simple Kretschmann–Raether geometry

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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 ${-}{14.3}\;{\rm{dB}}$ for transverse electric and ${-}{6.4}\;{\rm{dB}}$ for transverse magnetic polarization is achieved experimentally via a commonly used Kretschmann–Raether geometry and that too for a film thickness of ${\approx} 70 \;{\rm{nm}}$. 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.

© 2021 Optical Society of America

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Corrections

Sumit Goswami and Ashwini Kumar Sharma, "Material platform for realization of a “fiber-like” lossy mode resonance response in a simple Kretschmann–Raether geometry: publisher’s note," Opt. Lett. 46, 3279-3279 (2021)
https://opg.optica.org/ol/abstract.cfm?uri=ol-46-13-3279

24 June 2021: A typographical correction was made to p. 3067, first paragraph.


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Supplementary Material (1)

NameDescription
Supplement 1       Additional information related to characterization of ITO thin films.

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