Myung-Ki Kim

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The development of techniques for efficiently confining photons on the deep sub-wavelength spatial scale will revolutionize scientific research and engineering practices. The efficient coupling of light into extremely small nanofocusing devices has been a major challenge in on-chip nanophotonics because of the need to overcome various loss mechanisms and(More)
Many remarkable semiconductor-based nanolaser cavities using metal have been reported in past few years. However, the efficient coupling of these small cavities to waveguides still remains a large challenge. Here, we show highly efficient coupling of a semiconductor-based metal-clad nanolaser cavity operating in the fundamental dielectric cavity mode to a(More)
Surface plasmons are widely interesting due to their ability to probe nanoscale dimensions. To create coherent plasmons, we demonstrate a nanolaser based on a plasmonic bandgap defect state inside a surface plasmonic crystal. A one-dimensional semiconductor-based plasmonic crystal is engineered to have stopbands in which surface plasmons are prohibited from(More)
Guidelines for designing an optical antenna for optimizing the performance of a nanophotodiode are proposed. A nanopatch design is simulated with over 70% absorption efficiency using germanium as the absorber. I. Introduction Nanoscale photodetectors offer many benefits for optical interconnect applications [1]. The low capacitance increases the(More)
We propose two designs of nanoscale sub-fF germanium photodiodes which are efficiently integrated with silicon waveguides. The metal-optic cavities are simulated with the finite difference time domain method and optimized using critical coupling concepts. One design is for a metal semiconductor metal photodiode with <200 aF capacitance, 39% external quantum(More)
We propose a cladding engineering method that flexibly modifies the radiation patterns and rates of metal-clad nanoscale optical cavity. Optimally adjusting the cladding symmetry of the metal-clad nanoscale optical cavity modifies the modal symmetry and produces highly directional radiation that leads to 90% coupling efficiency into an integrated waveguide.(More)
We report on the experimental demonstration of laser based on one-dimensional plasmonic crystals. Plasmon radiation has been engineered to create subwavelength mode-volumes smaller than photonic crystals. The device operates with quasi-CW pumping at 77 Kelvin. I. Introduction Nanoscale light sources have become increasingly interesting due to their many(More)
Confining photons in the smallest possible volume has long been the theme of the nanophotonics community. In this study, we suggest two types of point-like cavities: 1) 3D nano-diabolo metallic cavities and 2) plasmonic crystal point-like cavities, which both extremely squeeze photons in a 3D fashion with mode volumes of &lt;; 10<sup>-6</sup>(More)
Menopause is characterized by rapid decreases in bone mineral density, aerobic fitness, muscle strength, and balance. In the present study, we investigated the effects of new sports tennis type exercise on aerobic capacity, follicle stimulating hormone (FSH) and N-terminal telopeptide (NTX) in the postmenopausal women. Subjects were consisted of 20(More)