Affiliation: | Single Quantum Dot Project, ERATO Japan Science and Technology Corporation, Tsukuba 300–2635, Japan;Advanced Technology Research Laboratories, and Plant Engineering and Technology Center, Nippon Steel Corporation, Futtu–city, Chiba 293–8511, Japan;Tokyo Engineering University, Hachioji–city, Tokyo 192–0982, Japan;Japan Fine Ceramics Center, Nagoya 456–8587, Japan;National Research Laboratory of Metrology, Tsukuba 305–8563, Japan |