Optical Response of a Spherically Confined Exciton with the Effects of e–h Exchange and Image Charge Density

✍ Scribed by K. Cho; H. Ajiki; T. Tsuji

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 86 KB
• Volume: 224
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/(sici)1521-3951(200104)224:3<735::aid-pssb735>3.0.co;2-d

✦ Synopsis

A thorough theoretical study has been made on the optical response of an exciton weakly confined in a sphere over a wide range of size, based on the previous work on the exciton level scheme which takes account of electron-hole (e-h) exchange interaction, size quantized center-of-mass (CM) motion, and the effect of background polarization. In the presence of transverse EM field, the cross section of elastically scattered light has been calculated according to a modified microscopic nonlocal response theory. The results allow us a systematic understanding of resonant spectral structure in a wide range of sample size, in relation with the corresponding level scheme, radiative shift and width, and the longitudinal and transverse character of each exciton level.