Publication

Interface Measurements of Heterojunction Band Lineups with the Vanderbilt Free-Electron Laser

Giorgio Margaritondo, Alok Rudra, Marc Ilegems, Jean-Louis Staehli, François Morier-Genoud, Denis Martin, Pierre-André Baudat
1992
Journal Articles

Abstract

We used optical pumping by the Vanderbilt free-electron laser and the technique of internal photoemission to measure with high accuracy the conduction-band discontinuity of semiconductor heterojunction interfaces. The experiment is the first application to our knowledge of a free-electron laser to interface research.

Official source

https://infoscience.epfl.ch/entities/publication/efbc4b32-83fa-4f46-b226-f62df296e171

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Giorgio Margaritondo, Alok Rudra, Marc Ilegems, Jean-Louis Staehli, François Morier-Genoud, Denis Martin, Pierre-André Baudat
1992
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/efbc4b32-83fa-4f46-b226-f62df296e171

About this result

Related concepts (26)

Laser diode

A laser diode (LD, also injection laser diode or ILD, or diode laser) is a semiconductor device similar to a light-emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode's junction. Driven by voltage, the doped p–n-transition allows for recombination of an electron with a hole. Due to the drop of the electron from a higher energy level to a lower one, radiation, in the form of an emitted photon is generated. This is spontaneous emission.

Free-electron laser

A free-electron laser (FEL) is a (fourth generation) light source producing extremely brilliant and short pulses of radiation. An FEL functions and behaves in many ways like a laser, but instead of using stimulated emission from atomic or molecular excitations, it employs relativistic electrons as a gain medium. Radiation is generated by a bunch of electrons passing through a magnetic structure (called undulator or wiggler).

Optical amplifier

An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics. They are used as optical repeaters in the long distance fiberoptic cables which carry much of the world's telecommunication links.

Related publications (1)

Interface Measurements of Heterojunction Band Lineups with the Vanderbilt Free-Electron Laser

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