A super coupling of radiation field and excitons confined in spatially periodic structure

✍ Scribed by Hajime Ishihara; Hideyuki Asakawa; Kikuo Cho

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 150 KB
• Volume: 7
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(99)00406-3

✦ Synopsis

By means of the microscopic nonlocal response theory, we analyze the mode structure of the coupled system of radiation and periodically conÿned excitons in multiple thin ÿlms. It is clariÿed how the spatially separated excitons which are coupled with each other via radiation share the radiative shift and width depending on the period and thickness of the excitonic active layers, and on their quantum number of conÿned levels. These results show the possibility that the very large radiative width can be realized by setting up the period and thickness of the excitonic active layers at appropriate values, which leads to very fast radiative decay beyond the saturated value of the giant oscillator strength e ect.