Dear all, I'm a newbie on optical peroperties calculations and have some confusions on the optical absorption edge juded from the absorption coefficient spectrum graph.
For detail, I'm reading the following paper: First Principles Calculations of Electronic Band Structure and Optical Properties of Cr-Doped ZnO The corresponding doi is as follows: http://pubs.acs.org/doi/abs/10.1021/jp811507r On the 3rd page of this paper, the author said: ------------------ the optical absorption edge of Cr-doped ZnO will shift to the high-energy region compared with pure ZnO, which will be discussed carefully below. ------------------ Then on the 4th page, the author said: ------------------ On the other hand, the absorption edge of the Cr-doped ZnO systems shifts slightly to higher energy with increasing Cr doping concentration. ------------------ Corresponding to all of the above informations, the author give the results by their group in Fig. 6 of that paper. I post here the Fig. 6 of that paper for your information. Could someone please give me some hints on the above analysis based on the Fig. 6, especially how determine the optical absorption edge from the absorption coefficient spectrum graph. Thanks in advance. -- Hongsheng Zhao <zhaohscas at yahoo.com.cn> School of Physics and Electrical Information Science, Ningxia University, Yinchuan 750021, China GnuPG DSA: 0xD108493 2011-2-3 -------------- next part -------------- A non-text attachment was scrubbed... Name: fig6.jpg Type: image/jpeg Size: 55409 bytes Desc: not available Url : http://www.democritos.it/pipermail/pw_forum/attachments/20110203/f72f9b4c/attachment-0001.jpg
