title: Planar photonic crystal based multifunctional sensors: publisher's note.
abstract: This note points out a missed correction to the math on p. 1779 of Appl. Opt.56, 1775 (2017)10.1364/AO.56.001775.
authors.forename: Yongyao
authors.initials: Y
authors.lastname: Chen
authors.forename: Haijun
authors.initials: H
authors.lastname: Liu
authors.forename: Zhijian
authors.initials: Z
authors.lastname: Zhang
authors.forename: Ashwani K
authors.initials: AK
authors.lastname: Gupta
authors.forename: Miao
authors.initials: M
authors.lastname: Yu