A5039663424- Photonic Crystals and Applications
- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- Catalytic Processes in Materials Science
- Optical Coatings and Gratings
- Advanced Antenna and Metasurface Technologies
- Salmonella and Campylobacter epidemiology
- Escherichia coli research studies
- Pneumonia and Respiratory Infections
- Hydrogels: synthesis, properties, applications
- Catalysis and Oxidation Reactions
- Viral gastroenteritis research and epidemiology
- Vibrio bacteria research studies
- Antibiotic Resistance in Bacteria
- Tuberculosis Research and Epidemiology
- Nonlinear Photonic Systems
- Advanced Chemical Physics Studies
- Mycobacterium research and diagnosis
- Organometallic Complex Synthesis and Catalysis
- Electrospun Nanofibers in Biomedical Applications
- Physics of Superconductivity and Magnetism
- Energetic Materials and Combustion
- Advanced Fiber Laser Technologies
- Nanoparticle-Based Drug Delivery
Gwangju Institute of Science and Technology
2019-2025
Sejong University
2024-2025
Korea Photonics Technology Institute
2013-2024
Agency for Defense Development
2024
Korea Disease Control and Prevention Agency
2011-2024
Korea National Institute of Health
2009-2024
Sungkyunkwan University
2017-2023
Photonics (United States)
2021
Korea Center for Disease Control and Prevention
2011-2020
Theranostics (New Zealand)
2017-2019
Abstract When two nonorthogonal resonances are coupled to the same radiation channel, avoided crossing arises and a bound state in continuum (BIC) appears with appropriate conditions parametric space. This paper presents numerical analytical results on properties of BIC due guided-mode one-dimensional (1D) leaky-mode photonic lattices slab geometry. In symmetric up-down mirror symmetry, Friedrich–Wintgen BICs infinite lifetime accompanied by crossings coupling between guided modes transverse...
We experimentally and theoretically demonstrate subwavelength scale localization of spoof surface plasmon polaritons at a point defect in two-dimensional groove metal array. An analytical expression for dispersion relation substantiates the existence band gap where mode can be introduced. A waveguide coupling method allows us to excite localized polariton modes measure their resonance frequencies. Numerical calculations confirm that have very small modal volume high $Q$ factor both which are...
pH- and temperature-responsive bioresorbable poly(ethylene glycol)–poly(aminoester urethane) copolymer incorporated cisplatin-bearing chondroitin sulfate nanogels have been developed for cancer cell-specific delivery of cisplatin.
Abstract Graphene-based optical modulators have been extensively studied owing to the high mobility and tunable permittivity of graphene. However, weak graphene-light interactions make it difficult achieve a modulation depth with low energy consumption. Here, we propose high-performance graphene-based modulator consisting photonic crystal structure waveguide graphene that exhibits an electromagnetically-induced-transparency-like (EIT-like) transmission spectrum at terahertz frequency. The...
Abstract Unidirectional light emission from planar photonic structures is highly advantageous for a wide range of optoelectronic applications. Recently, it has been demonstrated that unidirectional guided resonances (UGRs) can be realized by utilizing topological polarization singularities in momentum space. However, the practical application these emitters limited due to their intricate geometric configurations, requiring special efforts with high‐cost fabrication processes. In this study,...
Elastomeric nanofibers composed of cross-linked poly(2-hydroxyethyl methacrylate) are synthesized via a reactive electrospinning process. In this process, the photoinduced polymerization and cross-linking polymers take place simultaneously during The produced mostly within diameter range 100−500 nm in dry state. When they immersed aqueous solution, exhibit remarkably large elastic properties characteristic bulk hydrogel materials.
Abstract Bound states in the continuum (BICs) theoretically have ability to confine electromagnetic waves limited regions with infinite radiative quality ( Q ) factors. However, practical experiments, resonances can only exhibit finite factors due unwanted scattering losses caused by fabrication imperfections. Recently, it has been shown that ultrahigh‐ guided‐mode (GMRs), which are robust imperfections, be realized merging multiple BICs momentum space. This study analytically and...
Abstract Highly stable and bright single‐photon emitters at room temperature are fundamental components of quantum information technologies, which support advanced applications such as computing, communication, sensing. A key challenge in realizing these technologies is the creation efficient sources capable emitting across a broad spectral range. While defect‐based materials diamond, SiC, 2D III‐nitrides show significant promise, broadband extraction remains considerable obstacle, often...
Background Skin cancer is one of the most prevalent cancers worldwide. In clinical domain, skin lesions such as melanoma detection are still a challenge due to occlusions, poor contrast, image quality, and similarities between lesions. Deep-/machine-learning methods used for early, accurate, efficient Therefore, we propose boundary-aware segmentation network (BASNet) model comprising prediction residual refinement modules. Materials The module works like U-Net densely supervised by an...
Accurate and timely detection of diabetic retinopathy (DR) is crucial for managing its progression improving patient outcomes. However, developing algorithms to analyze complex fundus images continues be a major challenge. This work presents lightweight deep-learning network developed DR detection. The proposed framework consists two stages. In the first step, model used assess presence [i.e., healthy (no DR) or diseased (DR)]. next step involves use transfer learning further...
The polarization of light can be rotated in materials with an absence molecular or structural mirror symmetry. While this rotating ability is normally rather weak naturally occurring chiral materials, artificial metamaterials have demonstrated extraordinary rotational by engineering intra-molecular couplings. However, while general, exhibit strong rotatory power at around resonances, they convert linearly polarized waves into elliptically ones. Here, we demonstrate that inter-molecular...
Background Although the World Health Organization (WHO) classification of lung squamous cell carcinoma (SCC) was revised in 2015, its clinical implications for SCC subsets remain unclear. We investigated whether morphologic characteristics SCC, including keratinization, were associated with parameters and outcome patients. Methods A total 81 patients who underwent curative surgical resection diagnosed enrolled this study. Attributes such as tumor budding, single invasion, nuclear size within...
Development of implantable material to control the release chemotherapeutics in body is a promising approach cancer cell proliferation; however, implantation requires surgical intervention. Herein, we propose situ formation injectable biogels (IBGs) for programmed delivery potent chemotherapeutic drugs. IBGs are developed via cohesive molecular assembly polysaccharide-polymer network comprised hyaluronic acid-poly(β-amino urethane). Biocompatible could be administered subcutaneously through...
Conventional photonic lattices, such as metamaterials and crystals, exhibit various interesting physical properties that are attributed to periodic modulations in lattice parameters. In this study, we introduce novel types of namely Fourier-component-engineered metasurfaces, do not possess the first Fourier harmonic component We demonstrate these metasurfaces support continuous high-$Q$ bound states near second stop bands. The concept engineering components provides a new method manipulate...
Hepatocellular carcinoma is the most common malignancy with a high incidence rate and leading cause of cancer-related deaths. Herein, we developed thermo-responsive hydrogel comprising poly(ε-caprolactone-co-lactide)-b-poly(ethylene glycol)-b-poly(ε-caprolactone-co-lactide (PCLA) that exhibits acidity-accelerated delivery tumor-targeting glucuronic acid-bearing doxorubicin (DOX-pH-GA) conjugate into tumor tissues. The PCLA copolymer was post-modified boronic acid (BA-PCLA) to covalently...
Abstract Boron neutron capture therapy (BNCT) has been attracting interest as a new radiation modality for cancer because it can selectively destroy cells while maintaining the healthy state of surrounding normal cells. Many experimental trials have demonstrated significant BNCT treatment efficacy using beams from research reactors. However, nuclear reactor technology cannot be scaled to sites in hospitals delivering patient treatment. Therefore, compact accelerator-based sources that could...
We demonstrate experimentally and theoretically that spoof surface plasmons (SSPs) can propagate without diffraction, i.e., self-collimation (SC) of SSPs. To excite detect SSPs on a structured brass surface, we employed pair monopole antennas. The scanned horizontal vertical field intensity distributions the reveal narrow Gaussian envelope at SC frequency. While SSP is well maintained, being prevented from spreading during lengthy propagation, with frequencies below or above frequency...
Purpose Birt-Hogg-Dube syndrome (BHD) is a rare disorder caused by mutations in the gene that encodes folliculin (FLCN) and inherited an autosomal dominant manner. BHD commonly accompanied fibrofolliculomas, renal tumors, multiple pulmonary cysts, spontaneous pneumothorax. The aim of this study was to detect prospectively patients undergoing chest computed tomography (CT) scans evaluate further characteristics Korea. Methods We checked reviewed CT obtained for 10,883 at Gangnam Severance...
We present two photonic systems that make it possible to realize polarization-independent electromagnetically induced transparency based on guided-mode resonances. Each system is composed of planar dielectric waveguides and a two-dimensional crystal. Using finite-difference time-domain simulations, we demonstrate by coupling the resonances with low- high-quality factors, narrow window generated inside broad background transmission dip produced also show time delay occurs when light beams...