Speaker
Hedwig Knötig
(Institute of Solid State Electronics, TU Wien)
Description
We present the first interband cascade lasers fabricated into ring-shaped cavities emitting in continuous wave operation. A second order distributed feedback grating is used for single mode emission and light outcoupling in vertical direction through the GaSb substrate. In addition, the implementation of an epitaxial-side down mounting scheme facilitates improved heat transport from the active region. The devices with a waveguide width of ~5 µm and an outer diameter of 800 µm show light emission at a wavelength of ~4.38 µm. These newly developed devices are employed in a project for trace gas analysis via the principle of photothermal interferometry.
Primary author
Hedwig Knötig
(Institute of Solid State Electronics, TU Wien)
Co-authors
Borislav Hinkov
(TU Wien)
Robert Weih
(nanoplus Nanosystems and Technologies GmbH)
Sven Höfling
(nanoplus Nanosystems and Technologies GmbH and Physikalisches Institut and Wilhelm Conrad Röntgen-Research Center for Complex Material Systems, University Würzburg )
Werner Schrenk
(Center for Micro- and Nanostructures, TU Wien)
Johannes Koeth
(nanoplus Nanosystems and Technologies GmbH)
Johannes P. Waclawek
(Institute of Chemical Technologies and Analytics, TU Wien)
Bernhard Lendl
(Institute of Chemical Technologies and Analytics, TU Wien, Vienna, Austria)
Gottfried Strasser
(Institute of Solid State Electronics and Center for Micro- and Nanostructures, TU Wien, Vienna, Austria)
