Elaboration and optical properties of type-II ZnTe on ZnSe heterostructures

✍ Scribed by Rita Najjar; Régis André; Lucien Besombes; Catherine Bougerol; Serge Tatarenko; Henri Mariette

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 478 KB
• Volume: 165
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2009.02.014

✦ Synopsis

Special growth conditions are presented in this work, in order to produce ZnTe/ZnSe type-II quantum dots and preserve them during the capping stage. A detailed study emphasizes the high sensitivity of the sample structure to Se/Zn ratio as opposed to other growth parameters. It is shown that nominally identical samples can evolve into two-dimensional quantum well or quantum dot plane, depending on which element is in excess. Transmission electron microscopy, atomic force microscopy and optical characterizations evidence this phenomenon.