| LC control no. | sh2020005928 |
|---|---|
| Topical heading | Bloch oscillations |
| Variant(s) | BOs (Block oscillations) |
| See also | Oscillations |
| Found in | Work cat.: McAlpine, K.E. Advancing atom interferometry with a bloch-bands approach, 2019: abstr. (Bloch oscillations) p. 21 (Bloch oscillations generally refer to the behavior of a particle in a periodic potential experiencing a force) p. 41 (BOs) Wikipedia, June 12, 2020 (Bloch oscillation is a phenomenon from solid state physics. It describes the oscillation of a particle (e.g. an electron) confined in a periodic potential when a constant force is acting on it; Bloch oscillations were predicted by Nobel laureate Leo Esaki in 1970. However, they were not experimentally observed for a long time, because in natural solid-state bodies, [omega][subscript beta] is (even with very high electric field strengths) not large enough to allow for full oscillations of the charge carriers within the diffraction and tunneling times, due to relatively small lattice periods. The development in semiconductor technology has recently led to the fabrication of structures with super lattice periods that are now sufficiently large, based on artificial semiconductors) Physical review B, 15 June 1995: p. 17275 (Bloch oscillations (BO's)) Scientific reports, v. 7 (2017), article number 3194: p. 1 (The celebrated phenomenon of Bloch oscillations (BOs) was originally proposed for electrons in crystals in the presence of homogeneous electric fields which give rise to a potential that varies linearly in the field direction. After a long lasting debate about the actual existence of BOs, rigorous upper bounds for the interband tunelling rates could be established and the effective Hamiltonians that lead to BOs and their frequency-domain counterpart the Wannier-Stark ladder could be justified. In the early 1990s BOs were first observed experimentally in electrically-biased semiconductor superlattices using optical interband excitation with femtosecond laser pulses. A few years later, also for atoms in optical lattices and for coupled waveguides BOs have been realized) |
| Not found in | 2020 IEEE thesaurus, via WWW, June 12, 2020; A dictionary of physics, 2019; McGraw-Hill dictionary of physics, 1997; The Hutchinson pocket dictionary of physics, 2005 |
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