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Proceedings Paper

Shift happens: optical sensing with Dyakonov-Tamm waves
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Paper Abstract

An optical modality to sense a fluid by exploiting Dyakonov-Tamm (DT) waves was devised. In the modality, the fluid is present on both sides of the guiding interface. Theory showed that the angular location of reflectance dip in a practically implementable configuration will shift if the refractive index of the fluid changes. Furthermore, the detection sensitivity will decrease as the refractive index of the fluid increases over a wide range, and should be comparable to that for sensing modalities that exploit surface-plasmon-polariton (SPP) waves. Higher sensitivities are available with DT waves than with SPP waves, and the DT-wave-based sensor should be simpler to fabricate than the SPP-wave-based sensor. Multiple DT waves are excitable at the same frequency, leading to multiple channels for more reliable sensing as well as for sensing multiple analytes simultaneously.

Paper Details

Date Published: 27 August 2014
PDF: 11 pages
Proc. SPIE 9172, Nanostructured Thin Films VII, 91720H (27 August 2014); doi: 10.1117/12.2062713
Show Author Affiliations
Akhlesh Lakhtakia, The Pennsylvania State Univ. (United States)
Muhammad Faryad, Lahore Univ. of Management Sciences (Pakistan)

Published in SPIE Proceedings Vol. 9172:
Nanostructured Thin Films VII
Akhlesh Lakhtakia; Tom G. Mackay; Motofumi Suzuki, Editor(s)

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