Cascaded third-harmonic generation in a single short-range-ordered nonlinear photonic crystal

Collinear third-harmonic generation at 526.7 nm was realized by the simultaneous phase matching of two second-order processes in a single quadratic crystal: second-harmonic generation (SHG) and sum-frequency mixing (SFM). The measured conversion efficiency was 12%. As a nonlinear medium a LiNbO(3) n...

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Bibliographic Details
Published in:Optics letters 2009-03, Vol.34 (5), p.656-658
Main Authors: YAN SHENG, SALTIEL, Solomon M, KOYNOV, Kaloian
Format: Article
Language:English
Subjects:
Exact sciences and technology
Frequency conversion
harmonic generation, including high-order harmonic generation
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Optical materials
Optics
Photonic bandgap materials
Physics
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Summary:Collinear third-harmonic generation at 526.7 nm was realized by the simultaneous phase matching of two second-order processes in a single quadratic crystal: second-harmonic generation (SHG) and sum-frequency mixing (SFM). The measured conversion efficiency was 12%. As a nonlinear medium a LiNbO(3) nonlinear photonic crystal with short-range order was used that allowed simultaneous phase matching by use of discrete reciprocal vector (for the SHG process) and continuous reciprocal vectors (for the SFM process). It was demonstrated that the third harmonic could be generated efficiently in such a crystal even if the intermediate process of SHG was not perfectly phase matched.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.34.000656