Combined Exciton–Electron and Trion–Electron Excitations in ZnSe/ZnMgSSe Modulation-Doped Quantum Wells

✍ Scribed by V.P. Kochereshko; G.V. Astakhov; D.R. Yakovlev; W. Ossau; W. Faschinger; G. Landwehr

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 105 KB
• Volume: 229
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/1521-3951(200201)229:1<543::aid-pssb543>3.0.co;2-o

✦ Synopsis

In modulation-doped ZnSe/(Zn,Mg)(S,Se) quantum well structures with electron concentration of about 10 11 cm --2 a new resonant optical transition involving four particles (one hole and three electrons) was found in external magnetic fields in photoluminescence excitation and reflectivity spectra. This transition reveals as a narrow line between exciton and trion lines. It is identified with a combined process in which a photocreated exciton binds with an electron forming a trion and promotes for the second electron a transition to higher Landau levels.