title: Bioinspired micrograting arrays mimicking the reverse color diffraction elements evolved by the butterfly Pierella luna.
abstract: Recently, diffraction elements that reverse the color sequence normally observed in planar diffraction gratings have been found in the wing scales of the butterfly Pierella luna. Here, we describe the creation of an artificial photonic material mimicking this reverse color-order diffraction effect. The bioinspired system consists of ordered arrays of vertically oriented microdiffraction gratings. We present a detailed analysis and modeling of the coupling of diffraction resulting from individual structural components and demonstrate its strong dependence on the orientation of the individual miniature gratings. This photonic material could provide a basis for novel developments in biosensing, anticounterfeiting, and efficient light management in photovoltaic systems and light-emitting diodes.
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138;
authors.forename: Grant
authors.initials: G
authors.lastname: England
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139; and mkolle@mit.edu jaiz@seas.harvard.edu.
authors.forename: Mathias
authors.initials: M
authors.lastname: Kolle
authors.affiliation: Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138.
authors.forename: Philseok
authors.initials: P
authors.lastname: Kim
authors.affiliation: Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138.
authors.forename: Mughees
authors.initials: M
authors.lastname: Khan
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138;
authors.forename: Philip
authors.initials: P
authors.lastname: Muñoz
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138;
authors.forename: Eric
authors.initials: E
authors.lastname: Mazur
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138; Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138 mkolle@mit.edu jaiz@seas.harvard.edu.
authors.forename: Joanna
authors.initials: J
authors.lastname: Aizenberg
mesh_terms: D000818:Animals; D005075:Biological Evolution; D002080:Butterflies / Q000033:anatomy & histology / Q000378:metabolism*; D010858:Pigmentation / Q000502:physiology*; D014921:Wings, Animal / Q000033:anatomy & histology / Q000378:metabolism*
keywords: bioinspired optics; biophotonics; gratings