EXTREMELY-NARROW LINEWIDTH OF THE CONFINED EXCITONS IN CuCl QUANTUM DOTS

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24th International Conference on the Physics of Semiconductors : Jerusalem, Israel August 2-7, 1998Homogeneous linewidth of the excitons confined in CuCl quantum dots embedded in a NaClcrystal was studied by heterodyne-detected accumulated photon echo technique. At 2K, photonecho signal shows an exponential decay with a decay time of 160ps except for a slow rise. Thehomogeneous linewidth calculated from the dephasing time was found to be much smaller thanthat reported previously by the other methods. At 1.5K, we observed the linewidth of 1.6meV. Asfar as we know, this is the narrowest exciton linewidth in quantum dots.
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