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Published online by Cambridge University Press: 21 February 2011
Optical second harmonic generation in epitaxial layers of CdxZn1−xS and CdxZn1−xS:ZnSand CdS:CdxZn1−xS strained layer superlattices whichhad been removed from their substrates has been investigated. Some evidencefor resonant enhancement of the second order non-linear susceptibility hasbeen found for one sample where the onset of optical absorption was atphoton energies close to that of the second harmonic radiation.