Abstract

A quantum cascade laser emitting at 1.39 and 2.3THz is demonstrated. The structure is based on a large single quantum well and multiwavelength operation is obtained by selectively injecting carriers by resonant tunneling in the excited states of the well. A magnetic field applied perpendicularly to the layers increases the gain enabling laser action. Extremely low values of the threshold current density (below 30A∕cm2) are observed for both wavelengths. A study of the dependence of the laser emission intensity as a function of the applied magnetic field is also presented.

Keywords

LaserCascadeQuantum cascade laserQuantum tunnellingWavelengthMagnetic fieldExcited stateQuantum wellOptoelectronicsQuantum dot laserCurrent densityQuantumSemiconductor laser theoryMaterials sciencePhysicsAtomic physicsCondensed matter physicsOpticsChemistryQuantum mechanics

Affiliated Institutions

Related Publications

Blue-green laser diodes

M. A. Haase , Jun Qiu , J. M. DePuydt +1 more

The first laser diodes fabricated from wide-band-gap II-VI semiconductors are demonstrated. These devices emit coherent light at a wavelength of 490 nm from a ZnSe-based single-...

1991 Applied Physics Letters 1629 citations

Optical electronics in modern communications

Amnon Yariv

1. Electromagnetic Theory 2. The Propagation of Rays and Beams 3. Propagation of Optical Beams in Fibers 4. Optical Resonators 5. Interaction of Radiation and Atomic Systems 6. ...

1997 Oxford University Press eBooks 1206 citations

Publication Info

Year
2006
Type
article
Volume
88
Issue
14
Citations
80
Access
Closed

External Links

View on DOI.org

Social Impact

Altmetric
PlumX Metrics

Social media, news, blog, policy document mentions

Citation Metrics

80
OpenAlex

Cite This

Giacomo Scalari, Christoph Walther, Jérôme Faist et al. (2006). Electrically switchable, two-color quantum cascade laser emitting at 1.39 and 2.3THz. Applied Physics Letters , 88 (14) . https://doi.org/10.1063/1.2191407

Identifiers

DOI
10.1063/1.2191407