In this talk, I will address a few notable points in performing numerical treatment of the phenomenon of light slowing and storage in an electromagnetically-induced transparency (EIT) medium. I will numerically demonstrate the formation of the stationary light pulse (SLP), visualizing the dynamics of the atoms and the field inside the medium. Then I will talk about some interesting aspect of this phenomenon such as its applications as the optical “retarder,” “reflector,” “beam-splitter,” and so forth, in quantum information science.
Young-Tak Chough is a theoretical physicist who is now serving as the Chair Professor of the Department of Automotive Engineering, College of Engineering in Gwangju University. There are five metropolitan cities in South Korea, and Gwangju is one of them located in the South-Western region of the peninsula. Indeed, Dr. Chough studied on the theme of the Electron Paramagnetic Resonance (EPR) in a condensed-matter experiment group in Seoul National University (SNU) through his postgraduate course. After hopping to the United States for further study, however, he found he was indeed more interested in the theoretical (or, more precisely speaking, the computational) physics, than in the experimental, and joined the quantum optics theory group of Prof. Howard Carmichael in the University of Oregon, where he received his Ph.D. in 1997. Then, he went back to SNU to join the research group led by Prof. Wonho Jhe, the Center for Near-Field Atom-Photon Technology, where he came to meet with Prof. Kihwan Kim who back then was one of the most brilliant Ph.D. students there, he remembers. Since then the two scientists keep in a close touch with each other both academically and personally. Dr. Chough has also collaborated with Prof. Kyungwon An in SNU since Prof. K. An led a quantum optics experiment group called the Center for Macroscopic Quantum-field Lasers at Korea Advanced Institute of Science and Technology (KAIST) back then, until he finally and permanently moved to Gwangju University in 2002. Dr. Chough’s research interests include quantum optics and the theoretical description of the “open quantum systems,” in particular. Until today, he keeps publishing research papers on topics including quantum trajectory theory, theory of micromaser and microlaser, theory of atomic cooling and trapping, dynamics of matter-waves, Fock-state interference, etc., and more recently on the topics of light slowing and storage and stationary light pulses as well. He is a member of the Korean Physical Society (KPS) and the Optical Society of Korea (OSK) as well as of the American Physical Society (APS) and the Optical Society of America (OSA).