electron transition laser

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• Laser — For other uses, see Laser (disambiguation). United States Air Force laser experiment …   Wikipedia

• TRANSITION (MÉTAUX DE) — Les cinquante six éléments chimiques dits de transition actuellement connus comportent tous, soit à l’état d’élément simple, soit dans un état oxydé stable, une sous couche électronique d ou f partiellement remplie. L’existence de niveaux… …   Encyclopédie Universelle

• laser — /lay zeuhr/, n. Physics. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase. Also called optical maser. [1955 60; …   Universalium

• Laser à cascade quantique — Le laser à cascade quantique (abrégé en QCL pour Quantum Cascade Laser) est un laser à semi conducteur, pouvant émettre de l infra rouge moyen à l infra rouge lointain dont le principe d’émission par cascade quantique a été initialement proposé… …   Wikipédia en Français

• Electron affinity (data page) — Elements = Molecules References Many of the links to the full text of articles (linked from article titles) require subscription to the journal or payment. The links to abstracts are usually free of charge. *Andersen, H.H.; Petrunin, V.V.;… …   Wikipedia

• Laser diode — Top: a packaged laser diode shown with a penny for scale. Bottom: the laser diode chip is removed from the above package and placed on the eye of a needle for scale …   Wikipedia

• Électron — Traduction à relire Electron → …   Wikipédia en Français

• Electron — For other uses, see Electron (disambiguation). Electron Experiments with a Crookes tube first demonstrated the particle nature of electrons. In this illustration, the profile of the cross shaped target is projected against the tube face at right… …   Wikipedia

• Nitrogen laser — A 337nm wavelength and 170 µJ pulse energy 20 Hz cartridge nitrogen laser A nitrogen laser is a gas laser operating in the ultraviolet range[1] (typically 337.1 nm) using molecular nitrogen as its gain medium, pumped by an electrical… …   Wikipedia

• Quantum cascade laser — Quantum cascade lasers (QCLs) are semiconductor lasers that emit in the mid to far infrared portion of the electromagnetic spectrum and were first demonstrated by Jerome Faist, Federico Capasso, Deborah Sivco, Carlo Sirtori, Albert Hutchinson,… …   Wikipedia

• Tunable laser — A tunable laser is a laser whose wavelength of operation can be altered in a controlled manner. While all laser gain media allow small shifts in output wavelength, only a few types of lasers allow continuous tuning over a significant wavelength… …   Wikipedia