Abstract
The degenerate three-photon absorption coefficient and cross section associated with the interbandtransition 1S3/2(h)–1S(e) for CdTe spherical quantum dots have been calculated within the two-levelmodel. The band structure and wavefunctions are derived from the8 × 8 k·p Hamiltonian which takes into account the conduction–valence band coupling and themixing of the valence states. The transition selection rules for three-photon absorption inthe case of linearly polarized incident light are discussed in detail. The size-dependentthree-photon absorption spectra versus incident photon energy have been obtained andanalyzed.
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