Bang, O.Corney, J. F.2004-12-032004-12-0320012001http://hdl.handle.net/2003/114510.17877/DE290R-4070enThe American Physical SocietyPhysical Review Letters530Modulational Instability in Periodic Quadratic Nonlinear Materials10.1103/PhysRevLett.87.133901article (journal)