A5041941561- Photonic Crystals and Applications
- Plasmonic and Surface Plasmon Research
- Quantum Dots Synthesis And Properties
- Metamaterials and Metasurfaces Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Graphene research and applications
- Semiconductor materials and devices
- Ga2O3 and related materials
- GaN-based semiconductor devices and materials
- Chalcogenide Semiconductor Thin Films
- Spectroscopy and Laser Applications
- Carbon and Quantum Dots Applications
- Molecular Communication and Nanonetworks
- Photonic and Optical Devices
- Photoacoustic and Ultrasonic Imaging
- Optical Coatings and Gratings
- Orbital Angular Momentum in Optics
- CCD and CMOS Imaging Sensors
- Advanced Chemical Sensor Technologies
- Advanced Sensor and Energy Harvesting Materials
- Electron and X-Ray Spectroscopy Techniques
- Biosensors and Analytical Detection
- Advancements in Battery Materials
- Spectroscopy and Chemometric Analyses
Samsung (South Korea)
2012-2023
Multicolor single InGaN/GaN dot-in-nanowire light emitting diodes (LEDs) were fabricated on the same substrate using selective area epitaxy. It is observed that structural and optical properties of quantum dots depend critically nanowire diameters. Photoluminescence emission structures exhibits a consistent blueshift with increasing diameter. This explained by significantly enhanced indium (In) incorporation for nanowires small diameters, due to more dominant contribution In from lateral...
To date, there have been no efficient semiconductor light emitters operating in the green and amber wavelengths. This study reports on synthesis of InGaN nanowire photonic crystals, including dot‐in‐nanowires, nanotriangles, nanorectangles with precisely controlled size, spacing, morphology, further demonstrates that bottom‐up crystals can exhibit highly stable emission. The formation scalable band edge modes defect‐free is directly measured by cathodoluminescence studies. luminescence...
We have demonstrated a compact and efficient metasurface-based spectral imager for use in the near-infrared range. The was created by fabricating dielectric multilayer filters directly on top of CMOS image sensor. transmission wavelength each channel selected embedding Si nanopost array appropriate dimensions within multilayers corresponding pixels, this greatly simplified fabrication process avoiding variation multilayer-film thicknesses. meta-spectral shows high efficiency excellent...
Recent advancements in nanotechnology raise the feasibility of a miniaturized, portable Raman spectrometer with promising applications such as material identification, food safety monitoring, and health care. Miniaturizing spectrometers has remained challenge owing to inevitable weakness signals conflict between small size spectral resolution. In this study, we present mini-Raman comprising complementary metal–oxide semiconductor (CMOS) image sensor (CIS) integrated an array filter sets,...
We investigated systematic modulation of the Dirac point voltage graphene transistors by changing type ionic liquid used as a main gate dielectric component. Ion gels were formed from liquids and non-triblock-copolymer-based binder involving UV irradiation. With fixed cation (anion), shifted to higher size anion (cation) increased. Mechanisms for designing fully understood using molecular dynamics simulations, which excellently matched our experimental results. It was found that ion sizes...
Nanophotonics capable of directing radiation or enhancing quantum-emitter transition rates rely on plasmonic nanoantennas. We present here a novel Babinet-inverted magnetic-dipole-fed multislot optical Yagi–Uda antenna that exhibits highly unidirectional to free space, achieved by engineering the relative phase interacting surface plasmon polaritons between slot elements. The unique features this nanoantenna can be harnessed for realizing energy transfer from one waveguide another working as...
The photoresponse in graphene has drawn significant attention for potential applications owing to its gapless linear electronic band structure. To enhance both the spectral selectivity and responsivity graphene, we demonstrate a novel but versatile simple method of introducing surface plasmons. We utilize block copolymers fabricate different nanostructured metal nanoparticle arrays on single surface. plasmonic resonances could be tuned using Ag, Au, Cu nanoparticles. By extending synthetic...
The ability of metasurfaces to manipulate light at the subwavelength scale offers unprecedented functionalities for passive and active lasing devices. However, applications optical devices are rare due fabrication difficulties. Here, we present quantum dot emitting diodes (QDLEDs) with a metasurface-integrated metal electrode demonstrate microscopically controlled LED emission. By incorporating slot-groove antennas into electrode, show that emission from randomly polarized QD sources can be...
The patterning of colloidal quantum dots with nanometer resolution is essential for their application in photonics and plasmonics. Several approaches, such as the use polymer composites, molecular lock-and-key methods, inkjet printing microcontact have been recently developed. Herein, we present a simple method photonic nanostructures straight lines, rings dot patterns either on transparent or metallic substrates. Sub-10 nm width patterned line could be achieved well-defined sidewall...
We have developed a spectral image sensor based on CMOS for smartphone. The consists of optical bandpass filter array integrated top pixels. Each has different transmission wavelength peaks so information is directly retrieved by intensity map the sensor. applied technology to 1) Raman spectroscopy drug identification, 2) Freshness detection vegetables and 3) hyperspectral imaging applications color enhancement, food inspection skincare.
The patterning of colloidal quantum dots with nanometer resolution is essential for their application in photonics and plasmonics. Several approaches, such as the use polymer composites, molecular lock-and-key methods, inkjet printing, microcontact printing dots, have limits fabrication resolution, positioning variation structural shapes. Herein, we present an adaptation a conventional liftoff method dots. This simple easy requires no complicated processes. Using this method, formed straight...
Patterning of colloidal quantum dot (QD) a nanometer resolution is important for potential applications in micro- or nanophotonics. Several patterning techniques such as polymer composites, molecular key-lock methods, inkjet printing, and the microcontact printing QDs have been successfully developed applied to various plasmonic applications. However, these methods are not easily adapted conventional complementary metal-oxide semiconductor (CMOS)-compatible processes because either limits...
We demonstrate optical pumping lasers based on colloidal quantum dots, with a very thin geometry consisting of ≈20 nm thick film. Obstacles in ultrasmall laser devices come from the limitation gain materials and size cavities for lasing modes, which requires minimum thickness media (typically greater than 50–100 nm). Here we introduce dielectric waveguide structures high refractive index, order to reduce dot as well their threshold energy (≈39 % compared original medium). Finite-difference...
Recent advancements in nanotechnology raise the feasibility of a miniaturized, portable Raman spectrometer with promising applications such as material identification, food safety monitoring, and health care. Miniaturizing spectrometers has remained challenge owing to inevitable weakness signals conflict between small size spectral resolution. In this study, we present mini-Raman comprising complementary metal–oxide semiconductor (CMOS) image sensor (CIS) integrated an array filter sets,...