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Université de Neuchâtel

High-power integrated ultrafast semiconductor disk laser: multi-Watt 10 GHz pulse generation

Wittwer, Valentin J ; Mangold, Mario ; Hoffmann, Martin ; Sieber, Oliver D ; Golling, Matthias ; Südmeyer, Thomas ; Keller, Ursula

In: Electronic Letters, 2012, vol. 48, no. 18, p. 1144-1145

Presented is an optically pumped modelocked integrated externalcavity surface emitting laser (MIXSEL) with a pulse repetition rate of 10 GHz, generating picosecond pulses at 2.4 W average output power at a centre wavelength of 963 nm. The MIXSEL structure integrates both the absorber and the gain layers within the same wafer. The saturable absorber is a single layer of self-assembled InAs quantum...


Semiconductor vertical quantum structures self-formed in inverted pyramids

Zhu, Qing ; Kapon, Elyahou (Dir.)

Thèse Ecole polytechnique fédérale de Lausanne EPFL : 2008 ; no 4145.

Université de Neuchâtel

Terahertz intersubband emission in strong magnetic fields

Blaser, Stéphane ; Rochat, Michel ; Beck, Mattias ; Hofstetter, Daniel ; Faist, Jérôme

In: Applied Physics Letters, 2002, vol. 81, p. 67-69

Electroluminescence in quantum-cascade structures based on vertical transitions is studied in a strong perpendicular magnetic field in the limit in which the cyclotron energy is larger than the intersubband transition energy. Cyclotron emission and a luminescence intensity enhancement up to a factor of 6 is observed in GaAs/AlGaAs and InGaAs/InAlAs vertical transition-based quantum-cascade...

Université de Fribourg

Theoretical and experimental study of the Stark effect in the ground state of alkali atoms in helium crystals

Ulzega, Simone ; Weis, Antoine (Dir.)

Thèse de doctorat : Université de Fribourg, 2006.

This thesis work describes a detailed study of the Stark interaction in the ground state of cesium atoms trapped in a solid helium matrix. The motivation for the investigation of electric field effects on alkali species implanted in solid helium is related to the original main goal of our experimental activities, i.e., the measurement of a permanent atomic electric dipole moment (EDM). The...