Graded-lattice AAO photonic crystal heterostructure for high Q refractive index sensing

Jungmin Lee, Kyuyoung Bae, Gumin Kang, Minjung Choi, Seunghwa Baek, Do Sik Yoo, Chang Won Lee, Kyoungsik Kim

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


We present a low-cost and versatile optical sensor based on anodic aluminum oxide (AAO) graded-lattice photonic crystal heterostructure (PCH) template controlled by voltage pulse and electrolyte temperature. Designed PCH shows high Q factor up to ∼55 from the first order side band peak in the reflectance spectra and vivid color change due to infiltrated analytes. Highly linear refractive index sensitivity "dλ/dn" up to 441 nm RIU-1 could be obtained independent of analytes' polarities. Superb perceptual colorimetric sensing performance was attained up to 0.01 according to CIELab tristimulus mapping analysis.

Original languageEnglish
Pages (from-to)71770-71777
Number of pages8
JournalRSC Advances
Issue number88
Publication statusPublished - 2015 Aug 14

Bibliographical note

Publisher Copyright:
© 2015 The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)


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