Ji-yong Lee
Korea University · 工学
研究室紹介
Professor Ji-yong Lee's research lab specializes in advanced optical measurement techniques and nanomaterials engineering, with a strong focus on fiber optics, plasmonics, and biomedical imaging. The lab develops innovative methods for precise chromatic dispersion and mode delay characterization in optical fibers using spectral and low-coherence interferometry, enabling high-precision, real-time diagnostics. In parallel, the lab pioneers novel fabrication strategies for plasmonic nanostructures—such as nano-necklaces and patterned metallic arrays—through templated synthesis and galvanic displacement reactions, advancing applications in sensing and nanophotonics. The integration of these optical and nanofabrication techniques supports interdisciplinary research in biomedicine, including transcranial Doppler evaluation and intracerebral hemorrhage prognosis.
Research Overview
Research Output Trend
Figures are computed from collected data and may differ slightly.
Selected Papers
15We present a versatile and accurate chromatic dispersion measurement method for single mode optical fibers over a wide spectral range (200 nm) using a spectral domain white light interferometer. This technique is based on spectral interferometry with a Mach-Zehnder interferometer setup and a broad band light source. It takes less than a second to obtain a spectral interferogram for a few tens of centimeter length fiber sample. We have demonstrated that the relative group velocity, the chromatic
PURPOSE: To evaluate the accuracy of transcranial Doppler (TCD) sonography using different criteria for predicting cerebral infarction due to symptomatic vasospasm. METHODS: We retrospectively evaluated the clinical and radiologic data of consecutive patients admitted with acute aneurysmal subarachnoid hemorrhage (SAH) in the anterior cerebral circulation between January 2001 and June 2002. TCD sonographic examinations were performed on alternate days up to 20 days after admission. Cerebral infa
BACKGROUND AND PURPOSE: This study aimed to identify predictors of acute mortality after intracerebral hemorrhage (ICH), including voxel-wise analysis of hematoma location. METHODS: In 282 consecutive patients with acute ICH, clinical and radiological predictors of acute mortality were identified. Voxel-based lesion-symptom mapping examined spatial correlates of acute mortality, contrasting results in basal ganglia ICH and lobar ICH. RESULTS: Acute mortality was 47.9%. In bivariate analyses, one
We present a facile strategy for the generation of plasmonic nano-necklace arrays by introducing metallic precursors into strings of reconstructed inverse micelle nanotemplates which are induced by applying sequential selective solvent treatment and solvent vapour annealing for quasi-hexagonal arrays of poly(styrene-block-2-vinyl pyridine) inverse micelles.
We propose a novel mode analysis and differential mode delay measurement method for an optical fiber using Fourier-domain low-coherence interferometry. A spectral interferometer based on a Mach-Zehnder interferometer setup was used with a broadband source and an optical spectrum analyzer to detect relative temporal delays between the guided modes of a few-mode optical fiber by analyzing spectral interference signals. We have shown that experimental results of the proposed method agree well with
A versatile and facile route to control the composition of plasmonic nanoparticles (NP) aligned in a configuration of two dimensional nano-arrays is presented by applying galvanic displacement reactions on a pre-defined noble metal NP arrays which were prepared from diblock copolymer inverse micelles containing metal precursors.