Self-imaging and modulational instability in an array of periodically curved waveguides.
Linear and nonlinear light propagation in an array of waveguides with a periodically bent axis is theoretically investigated. In the linear propagation regime, it is shown that a self-imaging effect at periodic planes may occur, a phenomenon analogous to that of dynamic localization observed when an electron in a periodic potential is subjected to an ac field. In the nonlinear propagation regime, it is shown that periodic waveguide bending under the self-imaging condition inhibits the phenomenon of discrete modulational instability.
Longhi
Stefano
S
Dipartimento di Fisica and Istituto di Fotonica e Nanotecnologie del Cansiglio Nazionale delle Ricerche, Politecnico di Milano, Piazza L. da Vinci, 32 I-20133 Milano, Italy. longhi@fisi.polimi.it