Centini, MarcoD'Aguanno, GiuseppeSciscione, LetiziaSibilia, ConcitaBertolotti, MarioScalora, MichaelBloemer, Mark J.2020-05-182020-05-182004-07-09Centini, Marco; et al.; Phase matching in the presence of feedback: higher-order terms and enhancement of second-harmonic generation; Proceedings Volume 5360, Photonic Crystal Materials and Devices II; (2004); https://www.spiedigitallibrary.org/conference-proceedings-of-spie/5360/0000/Phase-matching-in-the-presence-of-feedback--higher-order/10.1117/12.527930.short?SSO=1https://doi.org/10.1117/12.527930http://hdl.handle.net/11603/18662Proceedings Volume 5360, Photonic Crystal Materials and Devices II; (2004); Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United StatesWe show that inside a multi-layer dielectric stack, consideration of higher-order, fast-oscillating interference terms between counter-propagating waves can dramatically change the dynamics of second harmonic generation, and thus lead to an unusual result: field confinement and overlap can be far better optimized, and conversion efficiencies further enhanced, in the presence of a phase mismatch. One may therefore conclude that phase matching is not always a necessary condition to provide optimized nonlinear frequency conversion efficiency.6 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