two-gap material
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Two-photon absorption — (TPA) is the simultaneous absorption of two photons of identical or different frequencies in order to excite a molecule from one state (usually the ground state) to a higher energy electronic state. The energy difference between the involved… … Wikipedia
Band gap — This article is about solid state physics. For voltage control circuitry in electronics, see Bandgap voltage reference. In solid state physics, a band gap, also called an energy gap or bandgap, is an energy range in a solid where no electron… … Wikipedia
Info-gap decision theory — is a non probabilistic decision theory that seeks to optimize robustness to failure – or opportuneness for windfall – under severe uncertainty,[1][2] in particular applying sensitivity analysis of the stability radius type[3] to perturbations in… … Wikipedia
Amnion (Gap Cycle) — The Amnion (singular, Amnioni) are a fictional alien species in Stephen Donaldson s The Gap Cycle. They are shown to be the only alien race humanity has made contact with and play a major role in the series from Forbidden Knowledge onwards.Amnion … Wikipedia
Kuzyk quantum gap — The Kuzyk quantum gap is a discrepancy between the maximum value of the nonlinear optical susceptibility allowed by quantum mechanics and the highest values actually observed in real molecules. The highest possible value (in theory) is known as… … Wikipedia
Spark gap — A spark gap consists of an arrangement of two conducting electrodes separated by a gap usually filled with a gas such as air. When a suitable voltage is supplied, a spark forms, ionizing the gas and drastically reducing its electrical resistance … Wikipedia
Mid-Atlantic gap — The Mid Atlantic Gap was the gap in coverage by land based Coastal Command antisubmarine (A/S) aircraft during the Battle of the Atlantic in the Second World War. It is frequently known as The Black Pit, as well as the Atlantic Gap, Air Gap,… … Wikipedia
Metal-induced gap states — In bulk semiconductor band structure calculations, it is assumed that the crystal lattice (which features a periodic potential due to the atomic structure) of the material is infinite. When the finite size of a crystal is taken into account, the… … Wikipedia
Gary Puckett & The Union Gap — (initially credited as The Union Gap featuring Gary Puckett ) was an American pop rock group in the late 1960s.HistoryGary Puckett (born 17 October 1942, Hibbing, Minnesota) grew up in Yakima, Washington (adjacent to the city of Union Gap) and… … Wikipedia
Buffalo Gap Historic Village — Infobox nrhp | name =Old Taylor County Courthouse and Jail nrhp type = caption = location= Buffalo Gap, Texas lat degrees = 32 lat minutes = 17 lat seconds = 10 lat direction = N long degrees = 99 long minutes = 49 long seconds = 36 long… … Wikipedia
submarine gap — ▪ geology also called Abyssal Gap, steep sided furrow that cuts transversely across a ridge or rise; such a passageway has a steeper slope than either of the two abyssal plains it connects. Grooves known as interplain channels exist in… … Universalium
