TY - JOUR
T1 - Optical Fourier Volumes
T2 - A Revisiting of Holographic Photopolymers and Photoaddressable Polymers
AU - Kim, Kwangjin
AU - Lim, Yongjun
AU - Son, Heeju
AU - Hong, Seung Jae
AU - Shin, Chang Won
AU - Baek, Dongjae
AU - Kim, Hyeon Ho
AU - Kim, Nam
AU - Bang, Joona
AU - Lee, Seungwoo
N1 - Funding Information:
K.K., Y.L., H.S., S.J.H., and C.-W.S. contributed equally to this work. This work was supported by the National Research Foundations of Korea (future technology laboratory program, project no. 2022M3H4A1A02074314), a Korea University grant, the KU-KIST School project, and the Future Research Grant (FRG) program at Korea University. The detailed information for the used PPs and PaPs in this study and their materials requests can be accessed in hope.korea.ac.kr.
Funding Information:
K.K., Y.L., H.S., S.J.H., and C.‐W.S. contributed equally to this work. This work was supported by the National Research Foundations of Korea (future technology laboratory program, project no. 2022M3H4A1A02074314), a Korea University grant, the KU‐KIST School project, and the Future Research Grant (FRG) program at Korea University. The detailed information for the used PPs and PaPs in this study and their materials requests can be accessed in hope.korea.ac.kr.
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/12/5
Y1 - 2022/12/5
N2 - To avoid mixing of the undesired frequencies in a free-space, the point sources of gratings, defined by a spatially varying refractive index, should be sinusoidally rather than binarily arranged. This long-lasting but gold standard lesson attainable from a classical Fourier optics, however, is underutilized in the practical materialization of gratings, mainly because most of the fabrication methods, developed thus far, are intrinsically compatible with a binary rather than sinusoidal grating. Recently, such design concept of optical Fourier elements has been implemented into the real surface gratings (referred to as optical Fourier surfaces) by taking advantage of advanced nanofabrication, whereas their volumetric equivalents (optical Fourier volumes, OFVs) have yet to be conceptually and experimentally elucidated. In this work, the key characteristics of OFVs and their structural requirements are systematically exploited with the assistance of analytical and numerical calculations. Especially, the dynamic range and thickness of volume gratings, required for OFVs, are newly defined. Given these theoretical blueprints, both the holographic photopolymers and photoaddressable polymers are then revisited and they are experimentally validated as easy-to-craft mediums of OFVs. The landscape of volume gratings is extended by providing an integrative pipeline of OFVs across their theoretical design and practical materialization.
AB - To avoid mixing of the undesired frequencies in a free-space, the point sources of gratings, defined by a spatially varying refractive index, should be sinusoidally rather than binarily arranged. This long-lasting but gold standard lesson attainable from a classical Fourier optics, however, is underutilized in the practical materialization of gratings, mainly because most of the fabrication methods, developed thus far, are intrinsically compatible with a binary rather than sinusoidal grating. Recently, such design concept of optical Fourier elements has been implemented into the real surface gratings (referred to as optical Fourier surfaces) by taking advantage of advanced nanofabrication, whereas their volumetric equivalents (optical Fourier volumes, OFVs) have yet to be conceptually and experimentally elucidated. In this work, the key characteristics of OFVs and their structural requirements are systematically exploited with the assistance of analytical and numerical calculations. Especially, the dynamic range and thickness of volume gratings, required for OFVs, are newly defined. Given these theoretical blueprints, both the holographic photopolymers and photoaddressable polymers are then revisited and they are experimentally validated as easy-to-craft mediums of OFVs. The landscape of volume gratings is extended by providing an integrative pipeline of OFVs across their theoretical design and practical materialization.
KW - azobenzene
KW - gratings
KW - holographic photopolymers
KW - optical Fourier volumes
KW - photoaddressable polymers
UR - http://www.scopus.com/inward/record.url?scp=85138505435&partnerID=8YFLogxK
U2 - 10.1002/adom.202201421
DO - 10.1002/adom.202201421
M3 - Article
AN - SCOPUS:85138505435
SN - 2195-1071
VL - 10
JO - Advanced Optical Materials
JF - Advanced Optical Materials
IS - 23
M1 - 2201421
ER -