Centini, M.D’Aguanno, G.Scalora, M.Bloemer, M. J.Bowden, C. M.Sibilia, C.Mattiucci, N.Bertolotti, M,2020-05-222020-05-222003-03-25Centini, M.; et al.; Dynamics of counterpropagating pulses in photonic crystals: Enhancement and suppression of stimulated emission processes; Physical Review E 67, 036617 (2003); https://journals.aps.org/pre/abstract/10.1103/PhysRevE.67.036617https://doi.org/10.1103/PhysRevE.67.036617http://hdl.handle.net/11603/18716Using numerical methods, we study the propagation of counterpropagating pulses in finite photonic crystals. We show that linear interference and localization effects combine to either enhance or suppress stimulated emission processes, depending on the initial phase difference between the input pulses. We consider the example of second harmonic generation, where we find a maximum contrast of three orders of magnitude in nonlinear conversion efficiency as a function of the input phase difference between incident pulses. We interpret these results by viewing the photonic crystal as an open cavity, with a field-dependent, electromagnetic density of modes sensitive to initial and boundary conditions.4 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.Public Domain Mark 1.0This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Text