Cascading Of 2Nd-Order Processes In Quadratic Molecular Media At The Origin Of Very Large Cubic Effects
Abbreviated Journal Title
2ND-ORDER PROCESSES; QUADRATIC MOLECULAR MEDIA; NONLINEAR PHASE-SHIFTS; 2ND-HARMONIC GENERATION; ORGANIC MATERIAL; SINGLE-CRYSTALS; 4-(N, N-DIMETHYLAMINO)-3-ACETAMIDONITROBENZENE; OPTICS; GROWTH; KTP; Materials Science, Multidisciplinary; Physics, Condensed Matter; Polymer; Science
We have shown that very large nonlinear shifts ranging from pi/4 to pi/2 observed at relatively modest input intensities in single-crystal cored fibers of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) have their origin in the cascading of two second-order nonlinear processes: second-harmonic generation followed by down-frequency conversion. The nonlinear shifts and corresponding n(2) values extracted from independent observations of self-phase modulation and direct interferometric measurements are as large as 10(-12) cm(2)/W at relatively modest input intensities from 30 to 60 MW/cm(2). The cascading origin of large n(2) values was fully confirmed by z-scan measurements performed on a single DAN crystal.
Article; Proceedings Paper
"Cascading Of 2Nd-Order Processes In Quadratic Molecular Media At The Origin Of Very Large Cubic Effects" (1994). Faculty Bibliography 1990s. 3082.