Surface-plasmonic-polaritonic sensor using a dielectric columnar thin film

Stephen E. Swiontek; Akhlesh Lakhtakia

doi:10.1117/12.2022453

19 September 2013 Surface-plasmonic-polaritonic sensor using a dielectric columnar thin film

Proceedings Volume 8818, Nanostructured Thin Films VI; 88180G (2013) https://doi.org/10.1117/12.2022453
Event: SPIE NanoScience + Engineering, 2013, San Diego, California, United States

Abstract

The propagation of a surface plasmon-polariton (SPP) wave can be guided by the interface of a metal and a columnar thin film (CTF). Theory predicts that the angle of incidence on the prism/metal interface in the Turbadar–Kretschmann–Raether prism-coupled configuration required to excite the SPP wave shifts upon infiltration of the CTF by a fluid. Otherwise identical CTFs of different thicknesses were partnered with dense thin films of aluminum in optical experiments. Regardless of the angle between the morphologically significant plane of the CTF and the cross-sectional plane of the prism, the angle of incidence for exciting the SPP wave was found to shift to a higher value when the CTF was infiltrated by a fluid of refractive index in excess of unity. Experimental data indicated that the angle between the morphologically significant plane of the CTF and the cross-sectional plane of the prism should not exceed about 45°◦ for high sensitivity.

Citation Download Citation

Stephen E. Swiontek and Akhlesh Lakhtakia "Surface-plasmonic-polaritonic sensor using a dielectric columnar thin film", Proc. SPIE 8818, Nanostructured Thin Films VI, 88180G (19 September 2013); https://doi.org/10.1117/12.2022453

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