Petal-Inspired Diffractive Grating on a Wavy Surface: Deterministic Fabrications and Applications to Colorizations and LED Devices

Kyung Jin Park, Jae Hoon Park, Ji Hyeok Huh, Chan Ho Kim, Dong Hae Ho, Gwan H. Choi, Pil J. Yoo, Sung Min Cho, Jeong Ho Cho, Seungwoo Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)


Interestingly, the petals of flowering plants display unique hierarchical structures, in which surface relief gratings (SRGs) are conformably coated on a curved surface with a large radius of curvature (hereafter referred to as wavy surface). However, systematic studies on the interplay between the diffractive modes and the wavy surface have not yet been reported, due to the absence of deterministic nanofabrication methods capable of generating combinatorially diverse SRGs on a wavy surface. Here, by taking advantage of the recently developed nanofabrication composed of evaporative assembly and photofluidic holography inscription, we were able to achieve (i) combinatorially diverse petal-inspired SRGs with controlled curvatures, periodicities, and dimensionalities, and (ii) systematic optical studies of the relevant diffraction modes. Furthermore, the unique diffraction modes of the petal-inspired SRGs were found to be useful for the enhancement of the outcoupling efficiency of an organic light emitting diode (OLED). Thus, our systematic analysis of the interplay between the diffractive modes and the petal-inspired SRGs provides a basis for making more informed decisions in the design of petal-inspired diffractive grating and its applications to optoelectronics.

Original languageEnglish
Pages (from-to)9935-9944
Number of pages10
JournalACS Applied Materials and Interfaces
Issue number11
Publication statusPublished - 2017 Mar 22
Externally publishedYes



  • diffractive grating
  • light emitting devices
  • optoelectronics
  • petal
  • structural colorizations

ASJC Scopus subject areas

  • Materials Science(all)

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