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4. Optical Magnetic Multipolar Resonances in Large Dynamic Metamolecules

Author

Ibrahim, Omar, Lee, Sunghee, Kim, Sung Wook, Pyun, Seung Beom, Woods, Connor, Cho, Eun Chul, Park, So-Jung, and Fakhraai, Zahra

Subjects
Physics - Optics
Abstract

Dynamic metamolecules (DMMs) are composed of a dielectric core made of hydrogel surrounded by randomly-packed plasmonic beads that can display magnetic resonances when excited by light at optical frequencies. Their optical properties can be controlled by controlling their core diameter through temperature variations. We have recently shown that DMMs display strong optical magnetism, including magnetic dipole and magnetic quadrupole resonances, offering significant potential for novel applications. Here, we use a T-matrix approach to characterize the magnetic multipole resonance modes of model metamolecules and explore their presence in experimental data. We show that high-order multipole resonances become prominent as the bead size and the overall structure sizes are increased, and when the the inter-bead gap is decreased. In this limit, mode mixing among high-order magnetic multipole modes also become significant, particularly in the directional scattering spectra. We discuss trends in magnetic scattering observed in both experiments and simulations, and provide suggestions for experimental design and verification of high-order optical magnetic resonances in the forward or backward scattering spectra. In addition, angular scattering of higher-order magnetic modes can display Fano-like interference patterns that should be experimentally detectable., Comment: Revised version of paper: added references, rearranged content and improved discussions, added new figures, and improved existing figures

Published
2021

22. Digital Architectural Form Generation Through Pixel System-Driven Image Feature Information.

Author

An, Hee-Sung, Jeon, You-Chang, and Kim, Sung-Wook

Abstract

This study analyzes valuable information (image feature information) from pixel-based images to systematize the form generation process utilizing this information. Information in architecture is mainly used as an analytical tool for functional design optimization. However, the Fourth Industrial Revolution and advances in information and communication technology have positioned information as a core value-creating tool. Consequently, there is a growing need to develop methodologies for effectively applying information to architectural design generation. This study combines digital technology with images, which directly influence architectural design, transforming them into numerical information. By systematizing the three-dimensional form generation process using low-level image feature information, it analyzes the relationship between the characteristics of valuable information and the generated forms. This approach helps identify the interrelationships between the characteristics of valuable information and the generated forms, the complementarity needed to mitigate the limitations of valuable information, and the potential for architectural applications of the three-dimensional form generation methodology utilizing image information. This approach reduces labor and enhances architectural aesthetics by instantly generating diverse early design alternatives. Such research can provide a more logical basis for avoiding intuitive judgments during the design decision-making process. It can also lay the groundwork for information-centric design systems in architecture. [ABSTRACT FROM AUTHOR]

Published
2024
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46. Gossypetin Prevents the Progression of Nonalcoholic Steatohepatitis by Regulating Oxidative Stress and AMP-Activated Protein Kinase

Author

Oh, Eunji, primary, Lee, Jae, additional, Cho, Sungji, additional, Kim, Sung Wook, additional, Won, Kyung, additional, Shin, Won Sik, additional, Gwak, Seung Hee, additional, Ha, Joohun, additional, Jeon, So Yeon, additional, Park, Jin-Hyang, additional, Song, Im-Sook, additional, Thoudam, Themis, additional, Lee, In-Kyu, additional, Kim, Seonyong, additional, Choi, Se-Young, additional, and Kim, Kyong-Tai, additional

Published
2023
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