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Deutscher MBE Workshop 2011

Wir danken allen Teilnehmern und Teilnehmerinnen für einen interessanten und stimulierenden Workshop:

05. - 06.10.2011, Jerusalemkirche, Berlin

Deutscher MBE Workshop

Wir setzen das erfolgreiche Format dieser Reihe von Veranstaltungen fort, die zuletzt in Bochum (2009), Zürich (2008) und Jülich (2007) abgehalten wurden.

more information
International workshop on atomic-scale manipulation and spectroscopy (AMS 2011)

The workshop was held on October 13 and 14, 2011, at NTT Atsugi R&D center.

The workshop is organized by NTT, Japan and PDI, Germany.

We thank all participants who made this workshop a real success!

Workshop webpage
Impressum

gesetzlich vorgesehene Pflichtangaben zur Kennzeichnung und rechtliche Hinweise zur Internetpräsenz (2010)

THz or FIR quantum-cascade lasers

For the THz or FIR spectral range, our investigations include

  • ongoing activities on quantum-cascade lasers for the THz spectral range. These investigations are motivated by the search for intersubband emitters lasing at higher temperatures (>200 K) as well as for structures exhibiting broad gain spectra for tunable lasers.
  • the optical coupling of two or three QCL cavities [1]. We have demonstrated the suppression of the longitudinal laser modes in two-sectioned QCLs due to interference effects of the laser light during its round trip. The mode behaviour depends on the driving currents partly affected by the level misalignment at high operating field strengths well as on the optical power of the laser modes due to saturation effects.

[1] M. Giehler, H. Kostial, R. Hey, and H. T. Grahn,
Suppression of longitudinal modes in two-sectioned, coupled-cavity GaAs/(Al,Ga)As terahertz quantum-cascade lasers,
Appl. Phys. Lett. 91, 161102, 3 pages (2007).

If you do not have access to one of these journals, please contact us and we can send the corresponding pdf file.
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