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January 17th, 2008
The nonlinear Fano effect
Abstract:
The Fano effect1 is ubiquitous in the spectroscopy of, for instance, atoms1, 2, bulk solids3, 4 and semiconductor heterostructures5, 6, 7. It arises when quantum interference takes place between two competing optical pathways, one connecting the energy ground state and an excited discrete state, the other connecting the ground state with a continuum of energy states. The nature of the interference changes rapidly as a function of energy, giving rise to characteristically asymmetric lineshapes. The Fano effect is particularly important in the interpretation of electronic transport5, 6 and optical spectra7, 8 in semiconductors.
Source:
nature.com
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