Hong Koo Kim Co-Director; Professor, Electrical and Computer Engineering
Nano-optics/plasmonics; nanoelectronics; nanosystems-on-a-chip
Professor Kim's research in nano-optics area focuses on: elucidation of the mechanisms of the interactions of light and metal at nanoscale; visualization of surface plasmon dynamics and interplays between polarization charges, electromagnetic fields, and energy flow on nanostructured surfaces of metal and dielectrics; utilization of these interactions in a controlled manner to enable novel functions of beam shaping and spectral filtering that can go beyond the conventional diffractive/refractive optics limits.
His research in nano-electronics area deals with developing a new class of devices that offer femtosecond transit time operating at a single-electron level at room temperature. The operating principle involves ballistic transport of electrons in localized nanochannels. This study aims at developing a fundamental understanding of the charge transport process and its application to ultrafast, low power device operation.
In nanosystems-on-a-chip research his group investigates multiscale integration of nanostructures into hierarchical systems involving various functional materials such as wide bandgap semiconductors, ferroelectric films, and plasmonic nanostructured materials. Single-domain ordered nanochannel arrays with controlled symmetry have been developed on macroscale area of wafer surface using a directed self-organization method, and have been investigated as an interaction medium in optical, electrical, chemical, and biological domains. Surface-plasmon phenomena occurring in nano-optic structures are of particular interest, since many novel properties can be derived from those and can be incorporated into an on-chip configuration for interaction with other functional materials. His group investigates plasmonics as an enabling technology for implementing nanosystems-on-a-chip that offer multifunctionality across the heterogeneous domains. He has authored five patents in nanotechnology area: self-organized nanostructured wafers; metal nanolenses; chip-scale optical spectrum analyzers and multispectral imaging devices; nano-optics enabled photovoltaic devices; single-electron-level ballistic devices.
- M. Biswas, Y. S. Jung, H. K. Kim, K. Kumar, G. J. Hughes, S. Newcomb, M. O. Henry, and E.McGlynn, “Microscopic origins of the surface exciton photoluminescence peak in ZnO nanostructures,” Phys.Rev. B 83, 235320 (10) (2011).
- D. Li, Y. S. Jung, S. Tan, H. K. Kim, E. Chory, and D. A. Geller, “Negligible absorption of radiofrequency radiation by colloidal gold nanoparticles,” J. Colloid Interface Sci. 358, 47-53(2011).
- Y. Xi, Y. S. Jung, and H. K. Kim, “Interaction of light with a metal wedge: the role of diffraction in shaping energy flow,” Optics Express 18, 2588-2600 (2010).
- Y. S. Jung, J. Wuenschell, H. K. Kim, P. Kaur, and D. H. Waldeck, “Blue-shift of surface plasmon resonance in a metal nanoslit array structure,” Optics Express 17, 16081-16091 (2009).
- T. B. Hur, H. K. Kim, and J. Blachere, “Epitaxial growth of Ag films on native-oxide-covered Si substrates,” Phys. Rev. B 75, 205306 (5) (2007).
- A. Kubo, K. Onda, H. Petek, Z. Sun, Y. S. Jung, and H. K. Kim, “Femtosecond imaging of surface plasmon dynamics in a nano-structured silver film,” Nano Lett. 5, 1123-1127 (2005).
- Z. Sun and H. K. Kim, “Refractive transmission of light and beam shaping with metallic nanooptic lenses,” Appl. Phys. Lett. 85, 642-644 (2004).
- M. Liu and H. K. Kim, “Ultraviolet detection with ultra-thin epitaxial ZnO films treated with oxygen plasma,” Appl. Phys. Lett. 84, 173-175 (2004).
- Z. Sun and H. K. Kim, “Growth of ordered, single-domain, aluminum nanopore arrays with holographically patterned aluminum films,” Appl. Phys. Lett. 81, 3458-3460 (2002).
- A. Nahhas, H. K. Kim, and J. Blachere, “Epitaxial growth of ZnO films on Si substrates using an epitaxial GaN buffer,” Appl. Phys. Lett. 78, 1511-1513 (2001).
PhD, Carnegie Mellon University, 1989
MS, KAIST, 1983
BS, Seoul National University, 1981
Yun Suk Jung