Photoluminescence of Cd1-xMnxSe quantum dots

✍ Scribed by Kohel Yanata; Yasuo Oka

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 134 KB
• Volume: 15
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1994.1047

✦ Synopsis

Photoluminescence in (\mathrm{Cd}{1-\mathrm{x}} \mathrm{Mn}{\mathrm{x}} \mathrm{Se}) quantum dots (QDs) embedded in quartz glass matrices has been investigated by the selective excitation spectroscopy in magnetic fields up to 7T. The transient luminescence of the QD exciton has also been measured in picosecond time domain. The exciton luminescence shows the excitonic magnetic polaron (EMP) effect in the (\mathrm{Cd}{1-\mathrm{x}} \mathrm{Mn}{\mathrm{x}} \mathrm{Se}) QDs with the EMP formation energy of (20 \mathrm{meV}). The lifetime of the QD excitons varies from (200 \mathrm{ps}) to (2 \mathrm{~ns}) in the exciton luminescence band. Marked docrease of the exciton lifetime is observed with increasing the magnetic field. The variation and the magnetic field effect of the lifetime of the QD excitons show dynamical behaviors of the EMPs in the (\mathrm{Cd}{1-\mathrm{x}} \mathrm{Mn}{\mathrm{x}} \mathrm{Se}) QDs.