Byungjoo Kim
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View article: Heteroatom‐Embedded Spiro[Fluorene‐9,9′‐Xanthene]‐Based Electron Transport Materials for Improved Driving Voltage and Efficiency in Phosphorescent Organic Light‐Emitting Diodes
Heteroatom‐Embedded Spiro[Fluorene‐9,9′‐Xanthene]‐Based Electron Transport Materials for Improved Driving Voltage and Efficiency in Phosphorescent Organic Light‐Emitting Diodes Open
The organic material 9,9‐spirobifluorene (SBF) is a useful building block for the construction of organic light‐emitting diodes owing to its rigid molecular structure, good charge transport properties, and high triplet energy. However, the…
View article: Qudit-based variational quantum eigensolver using photonic orbital angular momentum states
Qudit-based variational quantum eigensolver using photonic orbital angular momentum states Open
Solving the electronic structure problem is a notorious challenge in quantum chemistry and material science. Variational quantum eigensolver (VQE) is a promising hybrid classical-quantum algorithm for finding the lowest-energy configuratio…
View article: Implementation of controlled unitary gates and its application in a remote-controlled quantum gate
Implementation of controlled unitary gates and its application in a remote-controlled quantum gate Open
Recently, remote-controlled quantum information processing has been proposed for its applications in secure quantum processing protocols and distributed quantum networks. For remote-controlled quantum gates, the experimental realization of…
View article: The Effects of Etchant on via Hole Taper Angle and Selectivity in Selective Laser Etching
The Effects of Etchant on via Hole Taper Angle and Selectivity in Selective Laser Etching Open
This research focuses on the manufacturing of a glass interposer that has gone through glass via (TGV) connection holes. Glass has unique properties that make it suitable for 3D integrated circuit (IC) interposers, which include low permit…
View article: Highly nonlinear optic nucleic acid thin-solid film to generate short pulse laser
Highly nonlinear optic nucleic acid thin-solid film to generate short pulse laser Open
Using aqueous precursors, we report successfully fabricating thin-solid films of two nucleic acids, ribonucleic acid (RNA) and deoxyribonucleic acid (DNA). We investigated the potential of these films deposited on a fiber optic platform as…
View article: Study of Through Glass Via (TGV) Using Bessel Beam, Ultrashort Two-Pulses of Laser and Selective Chemical Etching
Study of Through Glass Via (TGV) Using Bessel Beam, Ultrashort Two-Pulses of Laser and Selective Chemical Etching Open
Selective laser etching is a promising candidate for the mass production of glass interposers. It comprises two steps: local modification by an ultrashort-pulsed laser and chemical etching of the modified volume. According to previous stud…
View article: Tunable microsecond Q-switched fiber laser using an all-fiber deionized water saturable-absorber
Tunable microsecond Q-switched fiber laser using an all-fiber deionized water saturable-absorber Open
We experimentally demonstrated a tunable microsecond passively Q-switched fiber laser using deionized water (DIW) as a saturable absorber (SA). The DIW-SA was integrated into an all-fiber device by filling the gap between two cleaved fiber…
View article: Linear and nonlinear optical properties of transfer ribonucleic acid (tRNA) thin solid films
Linear and nonlinear optical properties of transfer ribonucleic acid (tRNA) thin solid films Open
Optical measurements of one of the vital biological molecules (RNA) in the human body.
View article: Low-Loss Polytetrafluoroethylene Hexagonal Porous Fiber for Terahertz Pulse Transmission in the 6G Mobile Communication Window
Low-Loss Polytetrafluoroethylene Hexagonal Porous Fiber for Terahertz Pulse Transmission in the 6G Mobile Communication Window Open
Hexagonal porous optical fiber without a central defect is proposed and numerically analyzed with the finite element method (FEM) for transmitting terahertz (THz) electromagnetic wave pulse. In experiments, the transmission characteristics…
View article: All-fiber integrated saturable absorber-tunable wavelength filter for Q-switching laser in both C- and L-bands
All-fiber integrated saturable absorber-tunable wavelength filter for Q-switching laser in both C- and L-bands Open
We proposed and experimentally demonstrated combining a nonlinear optic saturable absorber and a wideband-tunable spectral filter in a single graphene oxide (GO) film deposited fiber optic device. The GO film was prepared on the cleaved fa…
View article: Spatially selective DNA deposition on the fiber core by optically trapping an aqueous droplet and its application for ultra-compact DNA Fabry-Perot temperature sensor
Spatially selective DNA deposition on the fiber core by optically trapping an aqueous droplet and its application for ultra-compact DNA Fabry-Perot temperature sensor Open
We developed a new method to deposit deoxyribonucleic acid (DNA) solid film selectively only on the core of an optical fiber facet with a variable thickness, by optically trapping an aqueous DNA droplet during an optimal drying process. We…