Prof. Byoung S. Ham
Professor at Gwangju Institute of Science and Technology
SPIE Involvement:
Senior status | Conference Chair | Conference Program Committee | Editor | Author
Area of Expertise:
transient coherence optics such as photon echoes , quantum nonlienar optics , quantum memory , EIT/slow light , quantum information
Profile Summary

Since my phD with EIT (first experimental demonstration of electromagnetically induced transparency in solids) in 1995, I have been working in the area of nonlinear quantum optics such as slow light and light storage using rare-earth doped solids. Since 2006, I have been designated as a director of Photon Information Processing (PIP) by the Korean government, where the research topic is 1. photon logic gates and 2. quantum memory. For the photon logic gates, I proposed digital all-optical logic gates based on slow light and nondegenerate four-wave mixing, where the four-wave mixing efficiency can reach higher than 100%. It was published in APL in 2008 and registered a patent in 2010. For the quantum memory, I for the first time demonstrated EIT-based light storage using slow light phenomenon in PRL in 2002. Due to the lower efficiency and single-mode operation in time time domain, however, I needed to propose optically locked photon echoes for a multi-mode ultralong quantum memory protocol: Nature Photonics in 2009. This ulltralong quantum memory is absolutely required for quantum repeaters based on DLCZ protocol. The optically locked photon echo proposal was experimentally demonstrated in NJP in 2012. In 2012, I also presented a simple method of double rephasing technique combined with the optical locking in PRA Rapid Comm. I am still pursuing quantum memory research for the potential applications of DLCZ-based quantum repeaters. By the way, in the fall of 2013, I have organized Quantum Optics Workshop 2013 held in Jeju, S. Korea (
Publications (12)

SPIE Conference Volume | January 11, 2017

PROCEEDINGS ARTICLE | December 7, 2016
Proc. SPIE. 9980, Quantum Communications and Quantum Imaging XIV
KEYWORDS: Polarization, Single photon, Receivers, Telecommunications, Quantum information, Quantum communications, Current controlled current source

SPIE Conference Volume | December 4, 2014

PROCEEDINGS ARTICLE | November 29, 2012
Proc. SPIE. 8554, Quantum and Nonlinear Optics II
KEYWORDS: Quantum wells, Particles, Magnetism, Computing systems, Clouds, Spatial coherence, Excitons, Electroluminescent displays, Systems modeling, Condensed matter

PROCEEDINGS ARTICLE | November 6, 2010
Proc. SPIE. 7849, Optical Design and Testing IV
KEYWORDS: Metamaterials, Plasmonics, Transparency, Finite-difference time-domain method, Switching, Chemical species, Metals, Numerical simulations, Destructive interference, Absorption

Proc. SPIE. 7727, Quantum Optics
KEYWORDS: Coherence (optics), Data storage, Chemical species, Quantum efficiency, Raman spectroscopy, Quantum optics, Optical storage, Quantum information, Quantum communications, Quantum memory

Showing 5 of 12 publications
Conference Committee Involvement (7)
Quantum and Nonlinear Optics V
11 October 2018 | Beijing, China
Quantum and Nonlinear Optics IV
12 October 2016 | Beijing, China
Quantum and Nonlinear Optics III
9 October 2014 | Beijing, China
Quantum and Nonlinear Optics II
5 November 2012 | Beijing, China
Quantum and Nonlinear Optics
18 October 2010 | Beijing, China
Showing 5 of 7 published special sections
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