Special Presentation: Yong-Hee Lee, Ph.D. 1986

    Tuesday, February 11, 2014 - 3:30pm
    Meinel 647

    "Over 100-Fold Enhancement of Spontaneous Emission from Erbium Atoms Embedded in Metallic Nanocavity"


    Highly accelerated and bright spontaneous emission is observed from erbium atoms embedded in a gold nanotrech cavity. The very long radiative lifetime of erbium atoms and the very small modal volume of the metallic nanocavity are responsible for direct observation of this strong Purcell enchancement. Through time-resolved photoluminescence measurement, it is confirmed that the average decay rate of erbium atoms placed near the antinode of a metallic nanocavity is enhanced by a factor of 130 when compared to that located in a homogenous silica matrix. This measured decay rate agrees well with the rate of 120 estimated from finite-difference-time-domain methods.

    Speaker Bio(s): 

    Yong-Hee Lee is a professor in the nanophotonics laboratory of the department of physics at the Korea Advanced Institute of Science and Technology. He received a B.S. in physics from Seoul National University (South Korea) in 1977, an M.S. in applied physics from KAIST in 1979 and a Ph.D. in optical sciences from the University of Arizona College of Optical Sciences in 1986.