1D photonic crystal strain sensors

Tsan Wen Lu*, Chia Cheng Wu, Po Tsung Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


We introduce a photonic crystal nanocavity consisting of one-dimensional periodic nanorods embedded in a deformable polydimethylsiloxane substrate, which exhibits a high-quality factor and a large wavelength response to the applied strain. By further investigating its wavelength response to nonaxial planar strains, we propose and experimentally demonstrate a sensor unit that can precisely identify different planar strains, including their application direction, type, and value. This sensor prototype with small footprint and feasible coupling with optical waveguides could provide additional flexibility for strain analysis in a wide range of fields.

Original languageEnglish
Pages (from-to)2767-2772
Number of pages6
JournalACS Photonics
Issue number7
StatePublished - 18 Jul 2018


  • nanocavity
  • optical sensors
  • photonic crystals
  • semiconductor nanolasers
  • strain sensing

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