Publication

Crack-free highly reflective AlInN/AlGaN bragg mirrors for UV applications

Nicolas Grandjean, Jean-François Carlin, Marc Ilegems, Raphaël Butté, Julien Dorsaz, Eric Feltin, Gabriel Christmann
2006
Journal Articles

Abstract

We report the growth of highly reflective distributed Bragg reflectors (DBRs) in the UV region using the Al0.85In0.15N/Al0.2Ga0.8N lattice-matched system. The DBRs were deposited on nearly strain-free Al0.2Ga0.8N templates to avoid strain-induced structural degradations. The appearance of cracks was then completely suppressed. The DBRs exhibit a reflectivity higher than 99% at a wavelength as short as similar to 340 nm and a stop band width of 215 meV (20 nm). (c) 2006 American Institute of Physics.

Official source

https://infoscience.epfl.ch/entities/publication/6ff7839c-faf5-45ec-ad8a-a5c9353b5b07

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Nicolas Grandjean, Jean-François Carlin, Marc Ilegems, Raphaël Butté, Julien Dorsaz, Eric Feltin, Gabriel Christmann
2006
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6ff7839c-faf5-45ec-ad8a-a5c9353b5b07

About this result

Related concepts (10)

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.

Vertical-cavity surface-emitting laser

The vertical-cavity surface-emitting laser, or VCSEL ˈvɪksəl, is a type of semiconductor laser diode with laser beam emission perpendicular from the top surface, contrary to conventional edge-emitting semiconductor lasers (also in-plane lasers) which emit from surfaces formed by cleaving the individual chip out of a wafer. VCSELs are used in various laser products, including computer mice, fiber optic communications, laser printers, Face ID, and smartglasses.

Distributed Bragg reflector

A distributed Bragg reflector (DBR) is a reflector used in waveguides, such as optical fibers. It is a structure formed from multiple layers of alternating materials with different refractive index, or by periodic variation of some characteristic (such as height) of a dielectric waveguide, resulting in periodic variation in the effective refractive index in the guide. Each layer boundary causes a partial reflection and refraction of an optical wave.

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