A5068114205- Photonic Crystals and Applications
- Quantum Dots Synthesis And Properties
- Terahertz technology and applications
- Luminescence Properties of Advanced Materials
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Metamaterials and Metasurfaces Applications
- Advanced Sensor and Energy Harvesting Materials
- Silk-based biomaterials and applications
- Nanofabrication and Lithography Techniques
- Education, Safety, and Science Studies
- Polydiacetylene-based materials and applications
- RFID technology advancements
- Adipose Tissue and Metabolism
- MicroRNA in disease regulation
- Energy and Environmental Systems
- Metabolism, Diabetes, and Cancer
- Opportunistic and Delay-Tolerant Networks
- Photonic and Optical Devices
- Biochemical and Structural Characterization
- Optical Coatings and Gratings
- Educational Research and Pedagogy
- RNA Interference and Gene Delivery
- Education and Learning Interventions
- Berberine and alkaloids research
Seoul National University
2019-2025
Seoul Semiconductor (South Korea)
2023
Yeungnam University
2008-2018
Abstract Photonic crystal surface-emitting lasers (PCSELs) are promising light sources with numerous advantages, including vertical emission, single-mode operation, and high output power. However, the fabrication of PCSEL devices requires advanced techniques, such as wafer bonding or epitaxial regrowth, to form a photonic (PhC) structure close central waveguide layer. This process is not only complicated but also necessitates multiple semiconductor epitaxies, which reduces yield increases...
Abstract Solution-based optical gain materials offer a cost-effective path to coherent light sources. Further, bound states in the continuum (BICs) have garnered great interest owing their diverging quality ( Q ) factors. Therefore, hybrid of these – solution-based material for and BIC structure lasing mode should constitute an ideal form factor low-cost low-threshold nanolasers. However, nonuniform surface topography induced during thin-film formation material, especially on top...
Abstract Photonic crystal (PhC) phosphor, in which the phosphor material is periodically modulated for an enhancement color-conversion efficiency via resonant absorption of excitation photons, a paradigm-shifting structural platform. Two-dimensional (2D) square-lattice PhC currently considered most advanced platform because not only its high efficiency, but also immunity to polarization. In present study, two major modifications are made further improve performance 2D phosphor: increasing...
Silk protein is being increasingly introduced as a prospective material for biomedical devices. However, limited locus to intervene in nature-oriented silk makes it challenging implement on-demand functions silk. Here, we report how polymorphic transitions are related with molecular structures of artificially synthesized and design principles construct green-lithographic high-performative resist. The repetition number ratio two major building blocks essential determine the size content...
Nanopatterning on biomaterials has attracted significant attention as it can lead to the development of biomedical devices capable performing diagnostic and therapeutic functions while being biocompatible. Among various nanopatterning techniques, electron-beam lithography (EBL) enables precise versatile in desired shapes. Various are successfully nanopatterned bioresists by using EBL. However, use high-energy electron beams (e-beams) for high-resolutive patterning incorporated functional...
Abstract As transparent, flexible, and wearable organic electronics degrade under normal outdoor environmental conditions (e.g., water vapor, oxygen, UV light) extreme environments, including washing or rain, a customized encapsulation technology is required to improve device reliability. Herein, simple process presented for fabricating multifunctional hazy substrates (MFHSs) with excellent gas diffusion barrier (GDB), flexibility, reflectance, light scattering, waterproof properties. First,...
Excessive preadipocyte differentiation/adipogenesis is closely linked to the development of obesity. LY3009120 a pan‑Raf kinase inhibitor and known for its anticancer activities. In present study, effect on 3T3‑L1 cell adipogenesis was investigated. The differentiation preadipocytes into adipocytes measured by Oil Red O staining AdipoRed assay. Changes cellular protein expression phosphorylation levels in differentiating absence or presence were determined western blotting analysis. Cell...
Abstract As a continuing effort to improve the performance of photonic crystal (PhC) phosphors—an engineered nanophotonic phosphor structure developed by authors' group—hereby 2D PhC films are introduced. In particular, excitation polarization dependence inherent and suffered precedent 1D phosphors can be eliminated using square lattice due its fourfold rotational symmetry. addition, thickness high index backbone layer is intentionally increased so that dual resonances occur for both...
While phosphors play an immensely important role in solid-state lighting and full-colour displays, it has been noted lately that their performance can be largely improved via structural engineering. Here, phosphor material is synergistically merged with yet another structurally engineered platform, resonant cavity (RC). When a 40-nm-thick colloidal quantum dot (CQD) film embedded tailored RC moderate quality factor (Q ≈ 90), gains the ability to absorb majority (~87%) of excitation photons,...
Phosphors with high color-conversion efficiency are crucial for high-performance full-color displays. Recent research by the authors achieved 7-fold enhancement in through structurally engineered phosphors, where phosphor materials were integrated into a nano-photonic structure, specifically photonic crystal (PhC) to exploit resonant absorption. However, challenges remain, including waste of excitation photons and complex nanofabrication. In this presentation, structural based on cavity (RC)...
Photonic crystal (PhC) phosphor is a paradigm-shifting structural platform that the authors' group has developed. In this study, two major changes are introduced to existing two-dimensional PhC phosphor: an increase in refractive index contrast by replacing backbone material and planarization of surface squeegee method. Compared with reference phosphor, upgraded exhibits ~59 times enhanced absorption (simulated) ~7 emission (experimental). Although already impressive, huge gap between theory...
Summary form only given. As a continuing effort to improve the performance of photonic crystal (PhC) phosphors-an engineered nanophotonic phosphor structure developed by authors' group-we hereby introduce two-dimensional (2D) PhC films. In particular, excitation polarization dependence inherent and suffered precedent one-dimensional phosphors can be eliminated using square lattice due its four-fold rotational symmetry. addition, thickness high index backbone layer is intentionally increased...