Professor Ki-Hun Jeong, PhD

Principal Investigator
Professor, Department of Bio and Brain Engineering, KAIST 
Co-Director, KAIST Institute for Optical Science and Technology
1011 CMS Bldg. (E16). Gwahangno 335, Yuseong-gu, Daejeon 305-701, Korea
Phone +82.42.350.4323 (Office), FAX +82.42.350.4310, Email:
kjeong (at)

Ki-Hun Jeong is currently a full professor in the Department of Bio and Brain Engineering at KAIST in Korea, as well as an co-director at KAIST Institute for Health Science and Technology since 2006. He received a PhD from the University of California at Berkeley in 2005.

His previous research interest during PhD and postdoctoral studies at UC Berkeley was the design, microfabrication, and measurement of biophotonic MEMS for biomedical applications such as biomimetic advanced photonic devices, nanomechanical biophysical sensors, nanogap based dielectric spectroscopic biosensors, and MEMS endoscopes. In particular, his main achievement on biomimetic advanced photonic systems was published in Science in 2006, entitled as “Biologically Inspired Artificial Compound Eyes”. This work received huge attentions from over 40 international/Korean News media. This work provides a new paradigm for developing wide field-of-view imaging or motion detection in surveillance detectors, mini-robots, and miniaturized imaging systems such as endoscopes, digital cameras or mobile phones.

His current research interests at KAIST include nanophotonics and Optical MEMS that can be inspired from biology and also utilized for advanced biological science or biomedical applications. After he joined at KAIST as an assistant professor in 2006, his academic backgrounds have been more focused on photonic MEMS devices for plasmonic biosensing and  endoscopic imaging. 

Ph.D Students

Sung-Pyo Yang
Email:  spyang (at)

I'm interested in Bio-inspired optical systems. 
 Currently, my research goal is to design novel fabrication procedure of aspherical microlens for various optical applications

Email:  kwjang (at)

3D imaging technology have applied not entertainments but medical industries. Stereoscopic endoscope is one of most interesting 3D imaging system. For stereoscopic endoscope, novel miniaturized device is required. I’m interested in development of the miniaturized device and hope to construct compact stereoscopic endoscope system with high resolution.

Email:  m.s.ahn (at)

Plasmonics has diverse applications in the field of bio-engineering. Among them, I am interested in color filter using nanostructures which exhibits tunable optical properties of plasmon. This key optical component can be applied into bio-imaging system which needs to be miniaturized.

Kyungmin Hwang
Email:  k.hwang (at)

I'm interested in a miniaturized microscopy for freely behaving mouse's brain imaging. My current research topic is a Lissajous fiber scanning catheter for confocal brain imaging using MEMS fabrication.

Won-kyung Lee
Email: wklee1129 (at)

Charles Soon Hong Hwang 
Email:  h.charles (at)
I'm interested in manipulation of light in the nanometer scale using alloyed plasmonic nanostructures. My current research is about wide range localized surface plasmon wavelength tuning using metal alloyed nanoislands.

Kisoo Kim

Email:  kisoo.kim1 (at)

I'm interested in a bioinspired optical system for Innovative changes in imaging devices. My current research topic is development of an ultrathin arrayed camera for far-field super-resolution imaging using microlens arrays and efficient light blocking materials.

Sang-In Bae
Email:  si_bae (at)
Antireflective structures (ARS) found in moth's eyes gives intriguing features in nano/biophotonic applications. ARS on a highly flexible elastomeric membrane for tunable liquid-filled lens can offer new opportunities for compact laparoscopic camera with maximum transmittance and variable zoom images. I'm interested with subwavelength nanostructures integrated with active tunable optical MEMS devices.

Jung-Woo Park
Email:  jungwoopark93 (at)

I am interested in metasurface optical components such as metalens or meta-spectroscope working in the visible range. Optical components can be designed in a miniaturized volume with a subwavelength nanostructures.


Email : bh.kang (at)

I'm interested in a plasmonic optical biosensor for molecular diagnosis with point-of-care testing. My research currently focuses on a development of SERS-based real-time photothermal PCR technology using plasmonic nanopillar arrays.

Master Students

Hyunwoo Kim
Email : hkim15(at)

MEMS scanner is recently at the center of attention due to its outstanding performance in uniformity, stability, low power consumption and miniaturization. My recent research is mainly about designing low Q-factor Lissajous scanning MEMS mirror for structured illumination. In specific, the final goal is to develop own novel single MEMS mirror-based structured illumination microscopy (SIM) system. 

Gi Beom Kim
Email : gbkim0417 (at)
I’m interested in a optical bio-sensing such as high sensitive surface plasmonic resonance (SPR)biosensor. My current research is applying coded light excitation to SPR sensor for high SNR and resolution.

Eunsil Yu
Email : eunsil_yu (at)
Sample preparation is performed to confirm genetic material for disease diagnosis or cancer target therapy. I’m interested in a sample preparation via photothermal effect. My current research is development of a photothermal cellular disruption biochip using Au nanoislands. 

Hamin Na
Email : hamin2817 (at)

I am interested in the separation of biomolecules such as proteins and genetic material.
My current research is the formation of temperature gradient using photothermal effect of nanoislands for size-based molecular separation.

Masahiro OGUCHOTokyo Institute of Technology,Japan,  Aug-Sept.2012


Yeong-Hyeon Seo, Staff Engineer at Samsung Electronics - Global Technology Center, Korea, PhD, Graduate 2012-2019.
Youngseop Lee, Postdoctoral Fellow in University of California, Berkeley, CA, U.S, Postdoctoral Fellow 2017-2019.
Taerin Chung, Postdoctoral Fellow in Rutgers University, NJ, U.S, Research Assistant Professor 2017-2018. 
Jae-Beom Kim, Senior Engineer at SK Hynix, Korea. PhD. Graduate 2012-2018.
Daniel Young-Suk Kim, MS Graduate 2016-2018.
Ji-Hyun Kwak, Engineer at Hyundai Motor Company, Korea. MS Graduate 2016-2018.
Moonseong Park, Senior Engineer at Samsung Advanced Institute of Technology, Korea. PhD. Graduate 2010-2017.
Chan-Sol Hwang, 
Engineer at Samsung Advanced Institute of Technology, Korea. MS Graduate 2015-2017.
Dongmin Keum, Senior Engineer at Samsung Electronics, Korea. PhD. Graduate 2009-2016. 
Min-Hee Kang, Senior Researcher at Samsung Medical Center, Korea, Korea. PhD, Graduate 2012-2016.
Sang-Gil Park, Senior Engineer at Samsung Electronics - Mechatronics R&D Center, Korea, PhD Graduate 2010-2015.
Jae-Jun Kim, Postdoctoral Fellow in University of Wisconsin-Madison, WI, U.S. PhD Graduate 2010-2015.
Hyuk-Jin Jeong, Senior Engineer at Samsung Electronics, Korea. PhD. Graduate 2009-2015
Seung-Bum Yang,  Research Scientist at LG Household & Healthcare, Korea. MS Graduate 2012-2014. 
Young-Jae Oh, Senior Engineer at Samsung Electronics, Korea. PhD Graduate 2008-2014.
Hyeon-Cheol ParkPostdoctoral Fellow in John Hopkins University, MD, U.S. PhD Graduate 2008-2014.
Minseok Lee,  Medical Innovation Foundation, Korea. MS Graduate 2011-2013.
Sunki Chae,  Research Scientist at LG Electronics, Korea. MS Graduate 2007-2009. 
Yongjae Choi, Seoul National University, College of Medicine, Korea. MS Graduate 2008-2010.
Jeonghwan Lee, Research Scientist at LG Inotek, Korea. MS Graduate 2009-2012.
Cheol Song, Professor in Robotics Engineering at DGIST, Korea. Postdoctoral Fellow 2010-2011.