A5058955790- Photonic and Optical Devices
- Photorefractive and Nonlinear Optics
- Surface Roughness and Optical Measurements
- Advanced Optical Imaging Technologies
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Spectroscopy and Quantum Chemical Studies
- Molecular Junctions and Nanostructures
- Ocular and Laser Science Research
- Optical measurement and interference techniques
- Electrowetting and Microfluidic Technologies
- Optical Coatings and Gratings
- Advanced Fiber Optic Sensors
- Solid State Laser Technologies
- Photochemistry and Electron Transfer Studies
- Optical and Acousto-Optic Technologies
- Quantum Dots Synthesis And Properties
- Spectroscopy and Chemometric Analyses
- Chalcogenide Semiconductor Thin Films
- Perovskite Materials and Applications
- Nanofabrication and Lithography Techniques
- Petroleum Processing and Analysis
- Advanced Photonic Communication Systems
- Optical Coherence Tomography Applications
- Optical Polarization and Ellipsometry
Gwangju Institute of Science and Technology
2015-2023
Pukyong National University
2013
Using a laser light source in imaging devices provides wide color gamut, high brightness, resolution, and efficiency. At the same time, it creates speckle pattern that deteriorates image quality. This paper is related to application of moving binary code diffractive optical element (DOE) for suppression display. Analytical optimization DOE parameters made this paper. The optimal pitch found analytically. Limitation length shown, highest possible estimated. Application compound Barker design...
Understanding the excited-state dynamics in perovskite photovoltaics is necessary for progress these materials, but changes depending on fabrication processes used photoactive layers remain poorly characterised. Here we report a comparative study femtosecond transient absorption (TA) CH3NH3PbI3 films fabricated by various solution-processing methods. The grain sizes and number of voids between grains each film varied according to synthesis method. At low excitation fluence 0.37 μJ cm-2, fast...
This study presents a convenient method for nanoparticles (NPs) patterning with high controllability of the number NPs. Dot-array zirconia (ZrO2) NPs were fabricated on microcontact printed hydrophilic-hydrophobic substrate without any post-functionalization ZrO2 Because has hydrophilic patterns hydrophobic passivation, colloids in de-ionized water selectively deposited substrate; thus, an “electrostatic approach” by functionalization is not required. In addition, patterned was controllable...
We developed an all-fiber RGB laser light source module for application in automobile head-up display. It is based on diodes and optical fiber combiner that substantially enhances the flexibility of configuration stability against harsh working conditions automobiles. coupled 13 with fibers merged them into a single output beam device. Red (R), green (G), blue (B) sources were employed to produce primary colors mixed white output. An power approximately 1.5 W was achieved, color balance...
We demonstrate one-dimensional beam steering in a liquid crystal on silicon (LCOS) device with large birefringence (Δ <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">n</i> = 0.2028 at 1550 nm) of the (LC) mixture. The experimental analysis optical angles different LCOS grating periods is reported. A maximum angle ±15.6° measured for fine pitch 3.6 μm 1 <sup xmlns:xlink="http://www.w3.org/1999/xlink"><i>st</i></sup> -order diffraction...
We design the apodized aperiodic poled lithium niobate crystals that generated broadband red, green, blue light based on second harmonic generation for laser projection display. The spectral and temporal bandwidth are about 10nm. sources exhibited speckle noise free.
Abstract Hybrid integration of silicon rich nitride and lithium niobate on insulator (SRN-LNOI) is an emerging material platform for photonic integrated circuits (PIC). In this paper, we present a systematic numerical investigation the mode properties strip-loaded SRN-LNOI hybrid waveguide at 1550 nm wavelength using full-vectorial finite difference method. Considering anisotropic nature (LN) crystal, effective refractive indices transverse electric magnetic modes SRN-LN waveguides were...
Lately, lithium niobate on insulator (LNOI) is considered an emerging platform because of excellent intrinsic (LN) material properties such as wide transparency, strong electro-optic and high refractive index difference ( <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\Delta n\sim 0.7$</tex> at 1550 nm) [1]. But, the chemical stability LN hinders direct etching approach resulting in slanted waveguide sidewalls well current LiF diffusion or...