Liquid refractive index sensing independent of opacity using an optofluidic diffraction sensor

Zhida Xu, Kevin Han, Ibrahim Khan, Xinhao Wang, G. Logan Liu

Research output: Contribution to journalArticlepeer-review

Abstract

We have implemented a multifunctional optofluidic sensor that can monitor changes in the refractive index and pressure of biofluid simultaneously and can detect free-solution molecular interaction in situ. In this Letter, we demonstrate two major improvements of this sensor proven by both simulation and experiments. One improvement is the broader measurement range of refractive index by making the diffraction grating with high-index polymer. The other improvement is the separation of refractive index sensing from opacity sensing by using the relative power ratio of diffraction orders. This simple, compact and low-cost multifunctional optofluidic sensor has the potential to be used for in situ biofluid monitoring.

Original languageEnglish (US)
Pages (from-to)6082-6085
Number of pages4
JournalOptics Letters
Volume39
Issue number20
DOIs
StatePublished - Oct 15 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Liquid refractive index sensing independent of opacity using an optofluidic diffraction sensor'. Together they form a unique fingerprint.

Cite this