A5046371014- 2D Materials and Applications
- Topological Materials and Phenomena
- Perovskite Materials and Applications
- Graphene research and applications
- Chalcogenide Semiconductor Thin Films
- Quantum and electron transport phenomena
- Quantum Dots Synthesis And Properties
- Photonic and Optical Devices
- Total Knee Arthroplasty Outcomes
- Bone fractures and treatments
- Orthopedic Infections and Treatments
- Semiconductor Quantum Structures and Devices
- MXene and MAX Phase Materials
- Nanowire Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Orthopaedic implants and arthroplasty
- Molecular Junctions and Nanostructures
- Hip disorders and treatments
- Terahertz technology and applications
- Mechanical and Optical Resonators
- Pelvic and Acetabular Injuries
- Shoulder and Clavicle Injuries
- Photorefractive and Nonlinear Optics
- Advanced Fiber Laser Technologies
- Advanced Thermoelectric Materials and Devices
Hanyang University
2019-2025
Anyang University
2025
Indian Council of Medical Research
2025
National Institute of Pathology
2025
Institute for Basic Science
2018-2020
Pandit Bhagwat Dayal Sharma Post Graduate Institute of Medical Sciences
2000-2020
Ansan University
2020
Los Alamos National Laboratory
2018-2020
Center for Integrated Nanotechnologies
2020
Los Alamos Medical Center
2020
The effective synthesis of two-dimensional transition metal dichalcogenides alloy is essential for successful application in electronic and optical devices based on a tunable band gap. Here we show process Mo1-xWxS2 using sulfurization super-cycle atomic layer deposition Mo1-xWxOy. Various spectroscopic microscopic results indicate that the synthesized alloys have complete mixing Mo W atoms gap by systematically controlled composition number. Based this, synthesize vertically...
We report ultrafast pump-probe spectroscopy examining exciton dynamics in atomically thin MoS2. Spectrally- and temporally-resolved measurements are performed to investigate the interaction of two important direct-gap excitons (A B) their associated broadening kinetics. The show strongly correlated inter-excitonic dynamic, which transient blue-shifted excitonic absorption originates from internal A-B interaction. observed complex spectral response is determined by collision-induced linewidth...
Hydatid disease (HD) is an ancient and even was known to Hippocrates. This involves all human parts most common affected organs are liver lungs. Incidence of unusual site about 8-10%. The clinical picture depends upon the involved organs, its effects on adjacent structures, complications due secondary infection, rupture, anaphylaxis caused by hydatid cysts.The aim this study find out incidence location cyst in body.A retrospective HD carried a medical college between July 2007 June 2012. A...
Two-dimensional surface-scattering dynamics are central in the physics of topological insulators. Numerous electrical and optical measurements have evidenced that origins novel optoelectronic response can be traced back to Dirac surface-electron dynamics. Intrinsic surface dynamics, however, remain elusive because these experiments cannot access frequencies rate. Time-resolved terahertz spectroscopy is only apparatus for directly probing collective low-energy electronic transitions. Here, by...
Abstract The optical Stark effect is a coherent light–matter interaction describing the modification of quantum states by non-resonant light illumination in atoms, solids and nanostructures. Researchers have strived to utilize this control exciton states, aiming realize ultra-high-speed switches modulators. However, most studies focused on only lowest state due lack energy selectivity, resulting low degree-of-freedom devices. Here, applying linearly polarized laser pulse few-layer ReS 2 ,...
Broadband detection of mid-infrared (IR) photons extends to advanced optoelectronic applications such as imaging, sensing, and telecommunications. While graphene offers an attractive platform for broadband visible/IR photodetection, previous efforts improve its responsivity, example, by integrating light-absorbing colloids or waveguide antenna fabrication, were achieved at the cost reduced photon bandwidth. In this work, we demonstrate room-temperature operation a novel mid-IR photodetector...
Deep-ultraviolet (DUV) photodetectors based on wide-band-gap semiconductors have attracted significant interest across a wide range of applications in the industrial, biological, environmental, and military fields due to their solar-blind nature. As one most promising materials, β-Ga2O3 provides great application potential over detection wavelengths ranging from 230 280 nm owing its superior optoelectronic performance, stability, compatibility with conventional fabrication techniques....
Two-dimensional (2D) layered materials exhibit strong light-matter interactions, remarkable excitonic effects, and ultrafast optical response, making them promising for high-speed on-chip nanophotonics. Recently, significant attention has been directed towards anisotropic 2D (A2DMs) with low in-plane crystal symmetry. These present unique properties dependent on polarization direction, offering additional degrees of freedom absent in conventional isotropic materials. In this review, we...
Modulating light via coherent charge oscillations in solids is the subject of intense research topics opto-plasmonics. Although a variety methods are proposed to increase such modulation efficiency, one central challenge achieve high depth (defined by ratio extinction with/without light) under small photon-flux injection, which becomes fundamental trade-off issue both metals and semiconductors. Here, fabricating simple micro-ribbon arrays topological insulator Bi2Se3, we report an...
Abstract The 1 s exciton—the ground state of a bound electron-hole pair—is central to understanding the photoresponse monolayer transition metal dichalcogenides. Above exciton, recent visible and near-infrared investigations have revealed that excited excitons are much richer, exhibiting series Rydberg-like states. A natural question is then how internal excitonic transitions interrelated on photoexcitation. Accessing these intraexcitonic transitions, however, demands fundamentally different...
Quantum beats, periodic oscillations arising from coherent superposition states, have enabled exploration of novel phenomena. Originating strong Coulomb interactions and reduced dielectric screening, two-dimensional transition metal dichalcogenides exhibit strongly bound excitons either in a single structure or hetero-counterpart; however, quantum coherence between is barely known to date. Here we observe exciton beats atomically thin ReS
Understanding the mutual interaction between electronic excitations and lattice vibrations is key for understanding transport optoelectronic phenomena. Dynamic manipulation of such elusive because it requires varying material composition on atomic level. In turn, recent studies topological insulators (TIs) have revealed coexistence a strong phonon resonance topologically protected Dirac plasmon, both in terahertz (THz) frequency range. Here, using these intrinsic characteristics TIs, we...
Renal angiomyolipoma is a benign tumour characteristically composed of fat, smooth muscles, and thick-walled blood vessels. In extremely rare instances, transformation into the more sinister leiomyosarcoma causes potentially drastic differences in both management strategies prognosis. most cases, radical nephrectomy remains standard modality choice for these tumours as they exhibit aggressive biological behaviour with unfavourable Herein, authors describe case renal 33-year-old male, which...
Abstract The slow cooling of hot carriers (HCs) is essential for realizing HC‐based solar cells, transistors, and photodetectors, as it enhances the extraction efficiency HCs’ excess energy. Recently, perovskites have gathered attention due to their long HC times, but face challenges such toxicity low air stability. Here, ultrafast transient absorption (TA) spectroscopy utilized investigate dynamics in few‐layer α‐In 2 Se 3 , a nontoxic air‐stable 2D material with high carrier mobility....
Abstract Low‐symmetry layered materials are emerging as promising platforms for polarization‐driven nanophotonics. Understanding their nonequilibrium photoresponses, especially polarization dependence, is not only essential designing high‐performance devices but also provides new anisotropic light–matter interactions. Here, unique optical‐gap shifts presented in germanium sulfide (GeS) using ultrafast differential transmission (DT) microscopy. Upon pump excitation, bandgap renormalization...
Direct observation of the Auger process (representative many-body interaction carriers) in emerging two-dimensional semiconductor PtSe<sub>2</sub>.
Asymmetric Fano resonance arises from quantum interference between discrete and continuum states. The characteristic asymmetry has attracted strong interests in understanding light-induced optoelectronic responses corresponding applications. In conventional solids, however, the tunability of is generally limited by a material's intrinsic property. Topological insulators are unique states matter embodying both conducting Dirac surface underlying bulk. If it possible to manipulate two...
Strong interactions between excitons are a characteristic feature of two-dimensional (2D) semiconductors, determining important excitonic properties, such as exciton lifetime, coherence, and photon-emission efficiency. Rhenium disulfide ($\mathrm{Re}{\mathrm{S}}_{2}$), member the 2D transition-metal dichalcogenide (TMD) family, has recently attracted great attention due to its unique that exhibit excellent polarization selectivity coherence features. However, an in-depth understanding...
Abstract Strongly bound excitons are a characteristic hallmark of 2D semiconductors, enabling unique light–matter interactions and novel optical applications. Platinum diselenide (PtSe 2 ) is an emerging material with outstanding electrical properties excellent air stability. Bulk PtSe semimetal, but its atomically thin form shows semiconducting phase the appearance band‐gap, making one expect strongly excitons. However, in have been barely studied, either experimentally or theoretically....
The charge carrier relaxation dynamics of bimetallic plasmonic catalysts Au/Ni and Au/Pt is significantly different from that pure Au nanoparticles, which will impact their performance.