Abstract
One of the greatest advances in the field of second-harmonic generation (SHG) has been brought about by the use of multi-domain crystals with periodic or aperiodic alteration of the sign of the quadratic nonlinearity. All applications involving the SHG process, however, rely on the propagation of the fundamental beam in the plane perpendicular to the ferroelectric domain walls. Here we realize a transverse geometry, when the fundamental beam propagates along the normal to the plane of nonlinearity modulation. We report on the observation of ringtype SHG and new type nonlinear diffraction patterns utilizing Z-cut samples with different types of modulation of their quadratic nonlinearity (see Fig. 1): (a) rectangular periodically poled structure patterned in stoichiometric LiTaO3 (RSLT); (b) annularly poled structure in stoichiometric LiTaO3 (ASLT); (c) short-range ordered poled structure patterned in LiNbO3 (SRO-LNB); (d) nonlinear photonic octagonal quasi-crystal sructure patterned in LiNbO3 (OQC-LNB); and (e) disordered nonlinear photonic structure such as unpoled SBN (DNPS-SBN).
© 2009 IEEE
PDF ArticleMore Like This
Ksawery Kalinowski, Yan Sheng, and Wieslaw Krolikowski
JM5A.29 Access Networks and In-house Communications (ANIC) 2012
Y. Sheng, D. Neshev, W. Krolikowski, A. Arie, K. Koynov, and Yu. Kivshar
NWC1 Nonlinear Photonics (NP) 2010
Shan-Chuang Pei, De-Hao Sun, Chia-Hsiang Hsu, Tuan-Shu Ho, Fu-Jen Kao, Sheng-Lung Huang, and A. H. Kung
CWG5 Conference on Lasers and Electro-Optics (CLEO:S&I) 2008