Seo, Changwon Shim, Jae -Eon Kim, Chanseul Lee, Eunji Choi, Gwan Hyun Yoo, Pil Jin Yi, Gi-Ra Kim, Jeongyong Kim, Teun-Teun 2024-07-18T04:30:07Z 2024-07-18T04:30:07Z 2024-07-18 2024-09 1567-1739 https://pubs.kist.re.kr/handle/201004/150241 In this article, we introduce our custom-built back -focal plane (BFP) scanning spectroscopy to explore an angle -resolved optical dispersion in two-dimensional (2D) photonic crystal (PhC) constructed with hexagonal lattice of nano -scaled dielectric rods. We fabricated a uniformly large -area photonic crystal measuring 1 cm by 0.5 cm, featuring a polymer -based hexagonal lattice on a gold layer, using capillary force lithography. This precision enables the effective confinement of photonic modes, leading to enhanced optical interactions. We successfully map out the angle -resolved reflectance spectra by directly scanning BFP, revealing the structure 's angle dependent optical response and providing insights into its iso-frequency contours. Our approach simplifies the exploration of advanced optical materials, highlighting the role of precise fabrication and measurement techniques in understanding and utilizing the optical properties of structured materials for various technological applications. English The Korean Physical Society Back-focal plane scanning spectroscopy for investigating the optical dispersion of large-area two-dimensional photonic crystal fabricated by capillary force lithography Article 10.1016/j.cap.2024.06.001 1 Current Applied Physics, v.65, pp.47 - 52 Current Applied Physics 65 47 52 N scie scopus kci 001261115500001 2-s2.0-85195562714 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article BAND-STRUCTURE