A5093750123- Metamaterials and Metasurfaces Applications
- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Advanced Antenna and Metasurface Technologies
- Optical Coatings and Gratings
- Advanced Fiber Optic Sensors
- Optical Wireless Communication Technologies
- Antenna Design and Analysis
- Photonic Crystals and Applications
- Advanced Wireless Communication Technologies
Korea University
2024
CMOS image sensor (CIS) plays a crucial role in diverse optical applications by facilitating the capture of images visible and near-infrared spectra. The enhancement resolution CIS an increase pixel density is becoming more significant realizable with recent progress nanofabrication. However, as size decreases towards diffraction limit, there inevitable trade-off between scale-down sensitivity. Recently, to overcome this, entirely new concept spectral sensing using nanophotonic-based color...
Recent development in nonlocal resonance based chiral metasurfaces draws great attention due to their abilities strongly interact with circularly polarized light at a relatively narrow spectral bandwidth. However, there still remain challenges realizing effective optical frequency demanding fabrications such as 3D-multilayered or nanoscaled geometry, which, particular, limit applications polarimetric detection high-Q spectra. Here, we study the underlying working principles and reveal...
The ability of fine-tuning wavelengths in a high-Q resonance has been applied to various optical applications, particularly that the development nanoscaled, ultrathin photodetectors realize next-generation sensors. However, designing nanopatterned surface photodetector induce intriguing effects inevitably deteriorates electrical properties due increased roughness and defects, which cause significant recombination photogenerated carriers. Moreover, light absorption semiconductor fundamentally...
The significance of antireflection has persisted over time due to its numerous optical applications. To achieve broadband antireflection, multiple element-based designs using graded-index films or multiresonant nanostructures have been conventionally employed. In this work, we propose an additional degree freedom in developing by manipulating the orientation angles symmetry-dependent Kerker condition. Under excitation multipoles higher-order resonances, which typically complicates...