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Non-phase-matched enhancement of second-harmonic generation in multilayer nonlinear structures with internal
Marco Centini1, Giuseppe D'Aguanno, Letizia Sciscione
1Dipartimento di Energetica, Università di Roma La Sapienza, Via Scarpa 16, 00161 Rome, Italy.
Optics Letters
|September 11, 2004
Abstract:
Traditional notions of second-harmonic generation rely on phase matching or quasi phase matching to achieve good conversion efficiencies. We present an entirely new concept for efficient second-harmonic generation that is based on the interference of counterpropagating waves in multilayer structures. Conversion efficiencies are an order of magnitude larger than with phase-matched second-harmonic generation in similar multilayer structures.