|[2015.11.19] [SIC Colloquium] 11/19(Thu) 16:00, Optical Precursors : From Fundamentals to Applications, by Heejeong Jeong, Language: English|
Dear SIC students,
For detailed information, please see the following:
Host: Byong Seung Ham / Language: English
Thursday, November 19, 2015, 16:00-17:30, Haerim Hall, SIC-B Bldg. 1st Floor
Optical Precursors : From Fundamentals to Applications
Heejeong Jeong, PhD
Optical precursors are transient effects in the electromagnetic pulse propagation through linearly dispersive media. One of the most interesting properties here is that the front of the transmitted field travels at the speed of light in vacuum. Although this unique characteristic was introduced hundreds years ago by Sommerfeld and Brillouin, it has been only recently that the optical precursors can be detected directly due to the long coherence time of cold atoms in magneto-optical trap. In this cold atomic resonant regime, the front constitutes tens of nanosecond scale long-lived 100% transmitted peak due to the coherent transient effect. Furthermore, when it is interacting with slow light in electromagnetically induced transparency (EIT) media, the peak goes up to about 800% compared to the input pulse intensity.
In this talk, I present recent history of optical precursor research including controversy raised at the beginning and agreement at the end. Then I extend the concept to the universal point of view to solve problems in other research area.
Heejeong Jeong is a Research Staff Member at Samsung Advanced Institute of Technology (SAIT). She received her Ph.D in 2006 from Duke University Physics Department under the supervision of Prof. Daniel J. Gauthier. She worked on direct observation of optical precursors in potassium cold atoms (MOT) for her thesis. After her graduation, she moved to join Thayer School of Engineering at Dartmouth College as a postdoctoral research associate. There, from 2006 to 2008, she developed theories of optical precursors for various dielectric media for the application of optical signal processing and underwater communication by the collaboration with Prof. Ulf Osterberg. She also combined the concepts of optical precursors and EIT to study fundametal properties of light matter interaction by collaboration with Prof. Shengwang Du at HKUST. In 2008, she came back to her home country, South Korea, and joined Visual Display Business unit of Samsung Electronics and worked on optics of new display and related technologies. Since 2010, she moved to SAIT and have worked on optoelectronic devices.
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