Phase matching in the presence of feedback: higher-order terms and enhancement of second-harmonic generation
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Date
2004-07-09
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Citation of Original Publication
Centini, 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=1
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This 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.
Public Domain Mark 1.0
This 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.
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Abstract
We 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.