Choi Wonshik

Choi Wonshik 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.

This is a Korean name; the family name is Choi.
Choi Wonshik
NationalitySouth Korean
Alma materSeoul National University
Known forTomographic phase microscopy
Scientific career
FieldsPhysics, optical physics, optical microscopy, deep-tissue imaging, imaging through scattering media
InstitutionsInstitute for Basic Science, Korea University, Massachusetts Institute of Technology, Seoul National University
Theses
Doctoral advisorAn Kyungwon
Other academic advisorsLee Jai-Hyung
Korean name
Hangul
Hanja
Revised RomanizationChoe Wonsik
McCune–ReischauerCh'oe Wŏnsik
WebsiteSuper-depth Imaging Lab

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]

Journal editing
gollark: <@186486131565527040> You could probably just multithread it.
gollark: I can help a bit I guess...
gollark: Stuff runs at those frequencies because the electromagnetic spectrum is pretty heavily government-regulated, with governments actually selling off access to most of it to companies, but most places allow use of 2.4 and 5GHz or so.
gollark: There are also different WiFi standards for packing higher data rates into whatever frequency range, some of which work, I think, by using several streams at different frequencies combined.
gollark: 2.4GHz and 5GHz are different, er, frequencies, though stuff doesn't run at exactly those frequencies but generally around them.

See also

References
  1. "Research Profiles - Wonshik Choi". Pure Service Center. Elsevier. Retrieved 23 August 2019.
  2. "Author details - Choi, Wonshik". Scopus. Retrieved 23 August 2019.
  3. "Prof. 최원식 (Wonshik Choi)". Korea University Department of Public Administration. Korea University. Retrieved 26 August 2019.
  4. "최원식 대학교수". 인물건색 (in Korean). Naver. Retrieved 22 August 2019.
  5. Choi, Wonshik; Lee, Jai-Hyung; An, Kyungwon; Fang-Yen, Christopher; Dasari, Ramachandra Rao; Feld, Michael S. (7 March 2006). "Observation of sub-Poisson photon statistics in the cavity-QED microlaser". Physical Review Letters. 96 (9): 093603. arXiv:quant-ph/0411147. doi:10.1103/PhysRevLett.96.093603. PMID 16606264.
  6. 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. PMID 17694065.
  7. US Patent 8848199B2, Wonshik; Ramachandra Rao & Christopher M. et al., "Tomographic phase microscopy", assigned to Massachusetts Institute of Technology
  8. Sung, Yongjin; Choi, Wonshik; Fang-Yen, Christopher; Badizadegan, Kamran; Dasari, Ramachandra R.; Feld, Michael S. (5 January 2009). "Optical diffraction tomography for high resolution live cell imaging". Optics Express. 17 (1): 266–277. doi:10.1364/OE.17.000266. hdl:1721.1/51357. PMC 2832333. PMID 19129896.
  9. Park, YongKeun; Diez-Silva, Monica; Popescu, Gabriel; Lykotrafitis, George; Choi, Wonshik; Feld, Michael S.; Suresh, Subra (16 September 2008). "Refractive index maps and membrane dynamics of human red blood cells parasitized by Plasmodium falciparum". Proceedings of the National Academy of Sciences. 105 (37): 13730–13735. doi:10.1073/pnas.0806100105. PMC 2529332. PMID 18772382.
  10. Khaykovich, Boris; Kozlova, Natalia; Choi, Wonshik; Lomakin, Aleksey; Hossain, Chintan; Sung, Yongjin; Dasari, Ramachandra R.; Feld, Michael S.; Benedek, George B. (15 September 2009). "Thickness–radius relationship and spring constants of cholesterol helical ribbons". Proceedings of the National Academy of Sciences. 106 (37): 15663–15666. doi:10.1073/pnas.0907795106. PMC 2747176. PMID 19717442.
  11. 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. doi:10.1038/nphoton.2015.24.
  12. Kang, Sungsam; Kang, Pilsung; Jeong, Seungwon; Kwon, Yongwoo; Yang, Taeseok D.; Hong, Jin Hee; Kim, Moonseok; Song, Kyung–Deok; Park, Jin Hyoung; Lee, Jun Ho; Kim, Myoung Joon; Kim, Ki Hean; Choi, Wonshik (18 December 2017). "High-resolution adaptive optical imaging within thick scattering media using closed-loop accumulation of single scattering". Nature Communications. 8 (1): 2157. doi:10.1038/s41467-017-02117-8. PMC 5735168. PMID 29255208.
  13. 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. doi:10.1038/nphoton.2012.159.
  14. 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. doi:10.1038/s41566-018-0120-9.
  15. Choi, Youngwoon; Yoon, Changhyeong; Kim, Moonseok; Yang, Taeseok Daniel; Fang-Yen, Christopher; Dasari, Ramachandra R.; Lee, Kyoung Jin; Choi, Wonshik (12 November 2012). "Scanner-free and wide-field endoscopic imaging by using a single multimode optical fiber". Phys. Rev. Lett. 109 (20): 203901. doi:10.1103/PhysRevLett.109.203901. hdl:1721.1/75435. PMC 4001713. PMID 23215488.
  16. Choi, Wonjun; Jo, Yonghyeon; Ahn, Joonmo; Seo, Eunsung; Park, Q-Han; Jhon, Young Min; Choi, Wonshik (6 March 2017). "Control of randomly scattered surface plasmon polaritons for multiple-input and multiple-output plasmonic switching devices". Nature Communications. 8: 14636. doi:10.1038/ncomms14636. PMC 5343438. PMID 28262721.
  17. "Wonshik Choi". Biological Research Information Center. Retrieved 26 August 2019.
  18. "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.
  19. "Super-depth, high-resolution imaging in a scattering medium: A technique that distinguishes single from multiple scattered waves achieves microscopic imaging with a near-diffraction-limit resolution of 1.5μm, at depths that would benefit medical applications". The International Society for Optics and Photonics. 22 December 2015. Retrieved 23 August 2019.
  20. "Editors". Scientific Reports. Nature. Retrieved 23 August 2019.
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