Shift happens: Optical sensing with Dyakonov-Tamm waves

Akhlesh Lakhtakia, Muhammad Faryad

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish (US)
Title of host publicationNanostructured Thin Films VII
EditorsAkhlesh Lakhtakia, Tom G. Mackay, Motofumi Suzuki
ISBN (Electronic)9781628411997
StatePublished - 2014
EventNanostructured Thin Films VII - San Diego, United States
Duration: Aug 20 2014Aug 21 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherNanostructured Thin Films VII
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Applied Mathematics
  • Electrical and Electronic Engineering
  • Computer Science Applications


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