Publication

The impact of low symmetry on the electronic and optical properties of quantum wires

Elyahou Kapon, Marc-André Dupertuis, Daniel Oberli
2000
Journal Articles

Abstract

The role of the confinement potential symmetry on the electronic and optical properties of quantum mires is systematically studied. In a wide class of quantum mires with mirror symmetry we evidence a new set of optical transitions resulting both from band mixing and Ct, symmetry breaking at zone center. Several kinds of quasi-one-dimensional excitons are predicted as well as their specific dipole coupling. Even for ultralow C-1 symmetry we find independent excitons with distinct polarization selection rules.

Official source

https://infoscience.epfl.ch/entities/publication/565560ab-5b03-4f4b-a4ad-0c9d5d34a172

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Elyahou Kapon, Marc-André Dupertuis, Daniel Oberli
2000
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/565560ab-5b03-4f4b-a4ad-0c9d5d34a172

About this result

Related concepts (32)

Symmetry (physics)

In physics, a symmetry of a physical system is a physical or mathematical feature of the system (observed or intrinsic) that is preserved or remains unchanged under some transformation. A family of particular transformations may be continuous (such as rotation of a circle) or discrete (e.g., reflection of a bilaterally symmetric figure, or rotation of a regular polygon). Continuous and discrete transformations give rise to corresponding types of symmetries.

Symmetry breaking

In physics, symmetry breaking is a phenomenon where a disordered but symmetric state collapses into an ordered, but less symmetric state. This collapse is often one of many possible bifurcations that a particle can take as it approaches a lower energy state. Due to the many possibilities, an observer may assume the result of the collapse to be arbitrary. This phenomenon is fundamental to quantum field theory (QFT), and further, contemporary understandings of physics.

C-symmetry

In physics, charge conjugation is a transformation that switches all particles with their corresponding antiparticles, thus changing the sign of all charges: not only electric charge but also the charges relevant to other forces. The term C-symmetry is an abbreviation of the phrase "charge conjugation symmetry", and is used in discussions of the symmetry of physical laws under charge-conjugation. Other important discrete symmetries are P-symmetry (parity) and T-symmetry (time reversal).

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The impact of low symmetry on the electronic and optical properties of quantum wires

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