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Opt Quant Electron (2007) 39:361375 DOI 10.1007/s11082-007-9102-8
 

Summary: Opt Quant Electron (2007) 39:361375
DOI 10.1007/s11082-007-9102-8
Quasi phase matching in two-dimensional nonlinear
photonic crystals
Ady Arie Nili Habshoosh Alon Bahabad
Received: 9 July 2006 / Accepted: 12 December 2007 / Published online: 16 June 2007
Springer Science+Business Media, LLC 2007
Abstract We analyze quasi-phase-matched (QPM) conversion efficiency of the five
possible types of periodic two-dimensional nonlinear structures: Hexagonal, square, rectan-
gular, centered-rectangular, and oblique. The frequency conversion efficiency, as a function
of the two-dimensional quasi-phase-matching order, is determined for the general case. Fur-
thermore, it is demonstrated for two basic feasible motifs, a circular motif and a rectangular
motif. This enables to determine the optimal motif dimensions for achieving the highest
conversion efficiency. We find that a rectangular motif is more efficient than a circular motif
for quasi-phase-matched processes that rely on a single reciprocal lattice vector (RLV), and
that under optimal choice of motif dimensions, it converges into a one-dimensional perio-
dic structure. In addition, in a few specific cases we found that higher order QPM can be
significantly more efficient than lower order QPM.
Keywords Quasi phase matching Nonlinear photonic crystals Nonlinear frequency
conversion Second harmonic generation

  

Source: Arie, Ady - Department of Electrical Engineering-Physical Electronics, Tel Aviv University

 

Collections: Engineering