Wannier-Stark

Fotónica y nanotecnología
In this paper we deal with the intimate connection between photonics and nanotechnology. We will briefly review the optical methods to …
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Electric Field Enhancement of the Rabi Splitting in a Superlattice-Microcavity System
We have observed a large coupling between the photonic mode of a microcavity and Stark-localized excitons from a superlattice embedded …
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Wannier-Stark localization and Bloch oscillations
This chapter discusses the effects of an electric field on the electronic and optical properties of semiconductor superlattices. Here …
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Wannier-Stark localization and Bloch oscillations
Miniband formation at finite electric fields in a graded-gap superlattice
We have investigated a graded-gap superlattice with differential photocurrent spectroscopy at 77 K. The lowest conduction subband …
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Local origin of photocurrent in semiconductor superlattices
To trace the origin of photocurrent (PC) in semiconductor superlatices, we have studied the PC spectra as a function of the applied …
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Change in dimensionality of superlattice excitons induced by an electric field
We have observed an electric-field-induced change in the dimensionality of excitons in superlattices, from three to quasi-two …
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Coherence and localization in semiconductor superlattices under electric fields
Using optical techniques, we have demonstrated that the quantum coherence of electron states in GaAs/GaAlAs superlattices under …
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Interactions between extended and localized states in superlattices
We have observed electric-field-induced interactions between the extended states of a (40 Å)-(15 Å) GaAs-Ga0.65Al0.35As superlattice …
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Temperature Dependence of the Electronic Coherence of GaAs-GaAlAs Superlattices
We have shown that the coherence length of electrons in a 55-Å-period GaAs-GaAlAs superlattice does not depend strongly on temperature …
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Optical properties of quantum wells and superlattices under electric fields
We review the effects of a longitudinal electric field on the optical properties of semiconductor quantum wells and superlattices, …
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