Erratum to: International Journal of Infrared and Millimeter Waves, Vol. 28, No. 2, February 2007 DOI: 10.1007/s10762-006-9191-7

The correct affiliation for Maoyan Wang is as follows:

School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu Sichuan 610054, People’s Republic of China.