Observation of Second-harmonic Whispering-gallery Modes in ZnO Nanotetrapod

by Zhang, Yong; Zhou, Huajun; Liu, S. W.; Tian, Z. Ryan; Xiao, Min

We report on the Formation of second-harmonic whispering-gallery modes (SH-WGMs) on the tapered ZnO nanotetrapod legs. The SH-WGMs have strong dependence on the polarization of the fundamental infrared excitation beam relative to the crystal axis. (C) 2009 Optical Society of America