Phys. Rev. B 37, 1273–1279 (1988)Very large optical nonlinearity of semiconductor microcrystallitesReceived 23 March 1987; published in the issue dated 15 January 1988 We analyze theoretically the oscillator strength and the third-order optical polarizability χ(3) due to excitons in semiconductor microcrystallites. The nonlinear optical polarizability is shown to be greatly enhanced for an assembly of such microcrystallites as the exciton is quantized due to the confinement effect and the excitons in a single microcrystallite interact strongly enough to make the excitons deviate from ideal harmonic oscillators. © 1988 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.37.1273
DOI:
10.1103/PhysRevB.37.1273
PACS:
78.20.-e, 42.65.-k, 71.35.+z
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