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.
Phase matching in the presence of feedback: Higher order terms and enhancement of second harmonic generation / Centini, Marco; G., D'Aguanno; L., Sciscione; Sibilia, Concetta; Bertolotti, Mario; M., Scalora; M. J., Bloemer. - In: PROCEEDINGS - SPIE. - ISSN 1018-4732. - ELETTRONICO. - 5360:(2004), pp. 328-332. (Intervento presentato al convegno Conference on Photonic Crystal Materials and Devices II tenutosi a San Jose, CA nel JAN 26-29, 2004) [10.1117/12.527930].
Phase matching in the presence of feedback: Higher order terms and enhancement of second harmonic generation.
CENTINI, MARCO;SIBILIA, Concetta;BERTOLOTTI, Mario;
2004
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
