Abstract
Optical second harmonic generation (SHG) that is recently shown to be a powerful surface and interface probe could be particularly useful for investigating multiple quantum well (MQW) properties. These low-dimensional structures display the large interest stemming both from a pure fundamental point of view as well as from the large potential for applications. Most studies and applications so far have been concerned with quantum structures based on direct bandgap III-V, and more recently, II-VI, compounds. A short-period Si/SiO2 quantum well structure seems to be of special interest as the two parent materials have a large difference in bandgap and dielectric constants. This gives rise to well-pronounced intersubband transitions in visible spectral region.
© 1996 Optical Society of America
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