1. S.F. Mousavi, R. Nouroozi, J. Opt. 22, 075801 (2020)
2. H. Hu, J. Zhang, S.A. Maier, Y. Luo, ACS Photon. 5, 592 (2018)
3. R.W. Boyd, Nonlinear optics, 3rd edn. (Academic Press, Oxford, 2008)
4. U. Simon, F.K. Tittel, Nonlinear optical frequency conversion techniques in atomic, molecular and optical physics: electromagnetic radiation, in Experimental Methods in the Physical Sciences 29. ed. by R. Celotta, R.G. Hulet, F.B. Dunning (Academic Press, New York, 1997), p.231
5. T.Y.F. Tsang, Phys. Rev. A 52, 4116 (1995)