Non-phase-matched enhancement of second-harmonic generation in multilayer nonlinear structures with internal reflections.
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.
Centini
Marco
M
Dipartimento di Energetica, Università di Roma La Sapienza, Via Scarpa 16, 00161 Rome, Italy.
D'Aguanno
Giuseppe
G
Sciscione
Letizia
L
Sibilia
Concita
C
Bertolotti
Mario
M
Scalora
Michael
M
Bloemer
Mark J
MJ