Patterning the second-order optical nonlinearity of asymmetric quantum wells by ion implantation enhanced intermixing

• Published in: Applied physics letters Vol. 72; no. 24; pp. 3097 - 3099
• Main Authors: Janz, S., Buchanan, M., van der Meer, P., Wasilewski, Z. R., Xu, D.-X., Piva, P., Mitchell, I. V., Akano, U. G., Fiore, A.
• Format: Journal Article
• Language: English
• Published: 15-06-1998
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.121558

The change in the second-order nonlinear susceptibility of an asymmetric quantum well (AQW) superlattice induced by ion beam-enhanced intermixing has been measured. The surface-emitted second-harmonic intensities radiated from implanted and masked areas of an AQW waveguide were measured and compared for incident wavelengths between λ=1480 and 1600 nm. Intermixing resulted in a 60 meV blueshift of the AQW band edge and a uniform suppression of the AQW second-order susceptibility, while the masked AQWs were unchanged.