title: Petal-Inspired Diffractive Grating on a Wavy Surface: Deterministic Fabrications and Applications to Colorizations and LED Devices.
abstract: 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.
authors.affiliation: SKKU Advanced Institute of Nanotechnology (SAINT) , Suwon 16419, Republic of Korea.
authors.forename: Kyung Jin
authors.initials: KJ
authors.lastname: Park
authors.affiliation: SKKU Advanced Institute of Nanotechnology (SAINT) , Suwon 16419, Republic of Korea.
authors.forename: Jae Hoon
authors.initials: JH
authors.lastname: Park
authors.affiliation: SKKU Advanced Institute of Nanotechnology (SAINT) , Suwon 16419, Republic of Korea.
authors.forename: Ji-Hyeok
authors.initials: JH
authors.lastname: Huh
authors.affiliation: School of Chemical Engineering Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea.
authors.forename: Chan Ho
authors.initials: CH
authors.lastname: Kim
authors.affiliation: SKKU Advanced Institute of Nanotechnology (SAINT) , Suwon 16419, Republic of Korea.
authors.forename: Dong Hae
authors.initials: DH
authors.lastname: Ho
authors.affiliation: School of Chemical Engineering Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea.
authors.forename: Gwan H
authors.initials: GH
authors.lastname: Choi
authors.affiliation: SKKU Advanced Institute of Nanotechnology (SAINT) , Suwon 16419, Republic of Korea.|School of Chemical Engineering Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea.
authors.forename: Pil J
authors.initials: PJ
authors.lastname: Yoo
authors.affiliation: SKKU Advanced Institute of Nanotechnology (SAINT) , Suwon 16419, Republic of Korea.|School of Chemical Engineering Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea.
authors.forename: Sung Min
authors.initials: SM
authors.lastname: Cho
authors.affiliation: SKKU Advanced Institute of Nanotechnology (SAINT) , Suwon 16419, Republic of Korea.|School of Chemical Engineering Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea.
authors.forename: Jeong Ho
authors.identifier: http://orcid.org/0000-0002-1030-9920
authors.initials: JH
authors.lastname: Cho
authors.affiliation: SKKU Advanced Institute of Nanotechnology (SAINT) , Suwon 16419, Republic of Korea.|School of Chemical Engineering Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea.
authors.forename: Seungwoo
authors.identifier: http://orcid.org/0000-0002-6659-3457
authors.initials: S
authors.lastname: Lee
keywords: diffractive grating; light emitting devices; optoelectronics; petal; structural colorizations