S. Janz et al., PATTERNING THE 2ND-ORDER OPTICAL NONLINEARITY OF ASYMMETRIC QUANTUM-WELLS BY ION-IMPLANTATION ENHANCED INTERMIXING, Applied physics letters, 72(24), 1998, pp. 3097-3099
The change in the second-order nonlinear susceptibility of an asymmetr
ic quantum well (AQW) superlattice induced by ion beam-enhanced interm
ixing has been measured. The surface-emitted second-harmonic intensiti
es radiated from implanted and masked areas of an AQW waveguide were m
easured and compared for incident wavelengths between lambda=1480 and
1600 nm. Intermixing resulted in a 60 meV blueshift of the AQW band ed
ge and a uniform suppression of the AQW second-order susceptibility, w
hile the masked AQWs were unchanged. (C) 1998 American Institute of Ph
ysics.