標題: Pattern formation of second harmonic conical waves in a nonlinear medium with extended defect structure
作者: Lin, Y. C.
Su, K. W.
Huang, K. F.
Chen, Y. F.
電子物理學系
Department of Electrophysics
公開日期: 17-十一月-2014
摘要: We experimentally demonstrate the propagation of the conical second harmonic fields generated from a nonlinear crystal with extended defects to investigate their pattern formation. The generated second harmonic waves are found to be the interference of multiple Bessel-like beams that originate from distinct longitudinal layers inside the crystal. To reconstruct the experimental results, we model the individual Bessel-like beam to be the superposition of an ensemble of identical decentered Gaussian waves with random phases. We present that the randomness of the phases leads the Bessel-like beams to show wave profiles with different extent of localization. Moreover, we use the coherent superposition of the developed wave functions with a phase factor to manifest the interference of multiple Bessel-like beams. The relative phases among the Bessel-like beams are shown to be closely related to the near and far-field patterns. With the experimental observations and the theoretical model, the relative phases are decided to successfully reconstruct the propagation characteristics of the multiple Bessel-like beams. (C) 2014 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.22.027859
http://hdl.handle.net/11536/123900
ISSN: 1094-4087
DOI: 10.1364/OE.22.027859
期刊: OPTICS EXPRESS
Volume: 22
Issue: 23
起始頁: 27859
結束頁: 27868
顯示於類別:期刊論文


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