Abstract
We experimentally demonstrate that the orbital angular momentum (OAM) of a second harmonic (SH) beam, generated within twisted nonlinear photonic crystals, depends both on the OAM of the input pump beam and on the quasi-angular momentum of the crystal. In addition, when the pump’s radial index is zero, the radial index of the SH beam is equal to that of the nonlinear crystal. Furthermore, by mixing two noncollinear pump beams in this crystal, we generate, in addition to the SH beams, a new “virtual beam” having multiple values of OAM that are determined by the nonlinear process.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Fabio Antonio Bovino, Matteo Braccini, Maurizio Giardina, and Concita Sibilia
J. Opt. Soc. Am. B 28(11) 2806-2811 (2011)
Mikhail I. Shalaev, Zhaxylyk A. Kudyshev, and Natalia M. Litchinitser
Opt. Lett. 38(21) 4288-4291 (2013)
Zengkai Shao, Jiangbo Zhu, Yanfeng Zhang, Yujie Chen, and Siyuan Yu
Opt. Lett. 43(6) 1263-1266 (2018)