Publication

Direct observation of the excitonic ac Stark splitting in a quantum well

Benoît Marie Joseph Deveaud, Jean-Louis Staehli, Denis Martin, Cristiano Ciuti, Michele Saba
2000
Journal Articles

Abstract

Ultrafast pump-probe measurements evidence the dynamical Stark splitting in the exciton absorption spectrum of a single semiconductor quantum well. The intensity of the Stark sidebands in the spectrum is comparable to the linear absorption and their separation scales as the pump field amplitude. In the time domain the Rabi oscillations are observed. The semiconductor Bloch equations solved in the Hartree-Fock approximation demonstrate that the coherent exciton-light coupling dominates over the many-body dephasing.

Official source

https://infoscience.epfl.ch/entities/publication/31b5239a-4f97-482f-8276-073a35e1f33a

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Benoît Marie Joseph Deveaud, Jean-Louis Staehli, Denis Martin, Cristiano Ciuti, Michele Saba
2000
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/31b5239a-4f97-482f-8276-073a35e1f33a

About this result

Related concepts (17)

Computational chemistry

Computational chemistry is a branch of chemistry that uses computer simulation to assist in solving chemical problems. It uses methods of theoretical chemistry, incorporated into computer programs, to calculate the structures and properties of molecules, groups of molecules, and solids. It is essential because, apart from relatively recent results concerning the hydrogen molecular ion (dihydrogen cation, see references therein for more details), the quantum many-body problem cannot be solved analytically, much less in closed form.

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Density-functional theory (DFT) is a computational quantum mechanical modelling method used in physics, chemistry and materials science to investigate the electronic structure (or nuclear structure) (principally the ground state) of many-body systems, in particular atoms, molecules, and the condensed phases. Using this theory, the properties of a many-electron system can be determined by using functionals, i.e. functions of another function. In the case of DFT, these are functionals of the spatially dependent electron density.

Molecular orbital theory

In chemistry, molecular orbital theory (MO theory or MOT) is a method for describing the electronic structure of molecules using quantum mechanics. It was proposed early in the 20th century. In molecular orbital theory, electrons in a molecule are not assigned to individual chemical bonds between atoms, but are treated as moving under the influence of the atomic nuclei in the whole molecule. Quantum mechanics describes the spatial and energetic properties of electrons as molecular orbitals that surround two or more atoms in a molecule and contain valence electrons between atoms.

Related publications (3)

Direct observation of the excitonic ac Stark splitting in a quantum well

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