Hong Koo Kim Professor, Electrical and Computer Engineering



Contact

412-624-9673
Fax: 412-624-8003
512 Benedum
Pittsburgh, PA

Research

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.

Kim

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.

Research Webpage

Publications

1. S. Srisonphan, M. Kim, and H. K. Kim, “Space charge neutralization by electron-transparent suspended graphene,” Scientific Reports 4, 3764(6) (2014).

2. H. K. Kim, G. W. Hanson, and D. A. Geller, “Are gold clusters in RF fields hot or not?” Science 340, 441-442 (2013).

3. D. Li, Y. S. Jung, H. K. Kim, J. Chen, D. A. Geller, M. V. Shuba, S. A. Maksimenko, S. Patch, E. Forati, and G. W. Hanson, “The effect of sample holder geometry on electromagnetic heating of nanoparticle and NaCl solutions at 13.56 MHz,” IEEE Trans. Biomedical Engineering 59, 3468-3474 (2012).

4. S. Srisonphan, Y. S. Jung, and H. K. Kim, “Metal-oxide-semiconductor field-effect-transistor with a vacuum channel,” Nature Nanotechnology 7, 504-508 (2012). 

5. D. Li, Y. Xi, and H. K. Kim, “Optical trapping by a metal thin-film edge,” Journal of Applied Physics 110, 103108(6) (2011).

6. 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,” Physical Review B 83, 235320(10) (2011).

7. 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,” Journal of Colloid and Interface Science 358, 47-53 (2011). 

8. 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).

Education

PhD, Carnegie Mellon University, 1989

MS, KAIST, 1983

BS, Seoul National University, 1981

Lab Members

Postdoctoral Fellows

Yun Suk Jung
Dongxiao Li

Graduate Students

Siwapon Srisonphan
Myungji Kim
Jinxuan Wu
I-Hung Ting