Covert Photonic Barcodes Based on Light Controlled Acidichromism in Organic Dye Doped Whispering-Gallery-Mode Microdisks

Zhenhua Gao, Cong Wei, Yongli Yan*, Wei Zhang, Haiyun Dong, Jinyang Zhao, Jun Yi, Chunhuan Zhang, Yong Jun Li, Yong Sheng Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)

Abstract

Photonic barcodes with a small footprint have demonstrated a great value for multiplexed high-throughput bioassays and tracking systems. Attempts to develop coding technology tend to focus on the generation of featured barcodes both with high coding capacity and accurate recognition. In this work, a strategy to design photonic barcodes is proposed based on whispering-gallery-mode (WGM) modulations in dye-doped microdisk resonant cavities, where each modulated photoluminescence spectrum constitutes the fingerprint of a corresponding microdisk. The WGM-based barcodes can achieve infinite encoding capacity through tuning the dimensions of the microdisks. These photonic barcodes can be well disguised and decoded based on the light controlled proton release and acidichromism of the organic materials, which are essential to fulfill the functions of anti-counterfeiting, information security, and so on. The results will pave an avenue to new types of flexible WGM-based components for optical data recording and security labels.

Original languageEnglish
Article number1701558
JournalAdvanced Materials
Volume29
Issue number30
DOIs
Publication statusPublished - 11 Aug 2017
Externally publishedYes

Keywords

  • acidichromism
  • intramolecular charge transfer (ICT)
  • organic nanophotonics
  • photonic barcodes
  • whispering-gallery-mode

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