Multimodal spectral control of a quantum-dot diode laser for THz difference frequency generation

R. Leyman, D.I. Nikitichev, N. Bazieva, E.U. Rafailov

Research output: Contribution to journalArticlepeer-review


Generation of stable dual and/or multiple longitudinal modes emitted from a single quantum dot (QD) laser diode (LD) over a broad wavelength range by using volume Bragg gratings (VBG's) in an external cavity setup is reported. The LD operates in both the ground and excited states and the gratings give a dual-mode separation around each emission peak of 5 nm, which is suitable as a continuous wave (CW) optical pump signal for a terahertz (THz) photomixer device. The setup also generates dual modes around both 1180m and 1260 nm simultaneously, giving four simultaneous narrow linewidth modes comprising two simultaneous difference frequency pump signals. (C) 2011 American Institute of Physics.

Original languageEnglish
Article number171107
Number of pages3
JournalApplied Physics Letters
Issue number17
Publication statusPublished - 24 Oct 2011

Bibliographical note

© 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Appl. Phys. Lett. 99, 171107 (2011) and may be found at


  • terahertz
  • radiation
  • silicon


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