Choi Wonshik (Korean: 최원식) is an optical physicist researching deep-tissue imaging and imaging through scattering media. He is a full professor in the Department of Physics of Korea University where he serves as the associate director at the IBS Center for Molecular Spectroscopy and Dynamics. Inside the Center, he leads the Super-depth Imaging Lab. He has been cited more than 4,000 times and has an h-index of 32.[1][2] He is a fellow of The Optical Society and the Korean Academy of Science and Technology.
Education
Choi majored in physics and received his B.S., M.S., and Ph.D. from the Department of Physics of Seoul National University in 1997, 1999, and 2004, respectively.[3] His M.S. adviser was Professor Lee Jai-Hyung and doctoral adviser was Professor An Kyungwon. His field of study for his doctorate was atomic and laser physics.
Career
He held two postdoc research positions[4] with the first taking place in the Department of Physics at Seoul National University. During his doctorate program and first postdoc position, Choi observed that the cavity-QED microlaser system at MIT exhibits sub-Poisson photon statistics by measuring the second-order correlation[5] which experimentally proved that the microlaser is a nonclassical source; a long-standing theoretical prediction. The second position was in the Michael S. Feld Group in the George R. Harrison Spectroscopy Laboratory of MIT for a period of three and a half years in which he focused on biomedical optics. During this time, he invented tomographic phase microscopy which enables quantitative 3-D imaging of the refractive index of living cells and tissues[6] of which a patent was later filed.[7] He then implemented the first optical diffraction tomography of living cells[8] which led to collaborative studies in biology[9] and soft matter.[10] These studies led to a new application area for digital holographic and interferometric microscopy.
In September 2009, Choi returned to South Korea to work in the Department of Physics of Korea University as an assistant professor. He became an associate professor in 2012 and a full professor in 2017. He is the principal investigator of the Super-depth Imaging Lab created in July 2016. The lab is within the IBS Center for Molecular Spectroscopy and Dynamics which falls under both the Institute for Basic Science and the Department of Physics in Korea University.
Choi's research interests include ultrahigh-resolution deep-tissue imaging,[11][12] control of wave propagation within scattering media,[13][14] ultra-thin endoscopic microscope,[15] and far-field control of near-field waves.[16] The research direction of his laboratory is to resolve tissue turbidity for super-depth optical imaging, light manipulation and phototherapy.[17]
^Choi, Wonshik; Fang-Yen, Christopher; Badizadegan, Kamran; Oh, Seungeun; Lue, Niyom; Dasari, Ramachandra R.; Feld, Michael S. (12 August 2007). "Tomographic phase microscopy". Nature Methods. 4 (9): 717–719. doi:10.1038/nmeth1078. PMID17694065. S2CID205418034.
^US Patent 8848199B2, Wonshik; Ramachandra Rao & Christopher M. et al., "Tomographic phase microscopy", assigned to Massachusetts Institute of Technology
^Kang, Sungsam; Jeong, Seungwon; Choi, Wonjun; Ko, Hakseok; Yang, Taeseok D.; Joo, Jang Ho; Lee, Jae-Seung; Lim, Yong-Sik; Park, Q-Han; Choi, Wonshik (9 March 2015). "Imaging deep within a scattering medium using collective accumulation of single-scattered waves". Nature Photonics. 9 (4): 253–258. Bibcode:2015NaPho...9..253K. doi:10.1038/nphoton.2015.24. S2CID122599375.
^Kim, Moonseok; Choi, Youngwoon; Yoon, Changhyeong; Choi, Wonjun; Kim, Jaisoon; Park, Q-Han; Choi, Wonshik (22 July 2012). "Maximal energy transport through disordered media with the implementation of transmission eigenchannels". Nature Photonics. 6 (9): 581–585. Bibcode:2012NaPho...6..583K. doi:10.1038/nphoton.2012.159. S2CID121504603.
^Jeong, Seungwon; Lee, Ye-Ryoung; Choi, Wonjun; Kang, Sungsam; Hong, Jin Hee; Park, Jin-Sung; Lim, Yong-Sik; Park, Hong-Gyu; Choi, Wonshik (26 March 2018). "Focusing of light energy inside a scattering medium by controlling the time-gated multiple light scattering". Nature Photonics. 12 (5): 277–283. arXiv:1709.09337. Bibcode:2018NaPho..12..277J. doi:10.1038/s41566-018-0120-9. S2CID118925609.
^"Editors". Scientific Reports. Nature. Retrieved 23 August 2019.
^"Member News - Publications". Google WebCache. The Optical Society. October 2013. Retrieved 23 August 2019. Finally, OSA would like to thank the following associate and topical editors for their hard work during their first terms and for agreeing to serve second three-year terms: (for Biomedical Optics Express) Wonshik Choi of Korea University, South Korea; Adam Gibson of University College London; and Eric Potma of The University of California, Irvine, U.S.A.; (for Optics Express) R. John Koshel of the University of Arizona, U.S.A., and Peter Uhd Jepsen of Technical University of Denmark; and (for the Journal of Optical Communications and Networking) Ken-ichi Kitayama of Osaka University, Japan.
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