News & Events


This page contains a single entry from the blog posted on April 6, 2011 9:26 AM.

The previous post in this blog was Seminar: Wednesday, March 30, 2011 at 3:30pm.

The next post in this blog is Seminar: Wednesday, April 13, 2011 at 3:30pm.

Many more can be found on the main index page or by looking through the archives.

Powered by
Movable Type 3.34

« Seminar: Wednesday, March 30, 2011 at 3:30pm | Main | Seminar: Wednesday, April 13, 2011 at 3:30pm »

Seminar: Wednesday, April 6, 2011 at 3:30pm

Solitons, Self-Induced Transparency, and Modelocking in Quantum Cascade Lasers
Dr. Curtis Menyuk

Standard semiconductor lasers operate in a limited wavelength range, below about 4 microns. Quantum cascade lasers (QCLs) that operate in the mid-IR and far-IR have important applications to medicine, environmental sensing, and national security. While short pulse lasers (~100 fs) are available for standard semiconductor lasers, that is not the case for QCLs. Standard passive modelocking is hard to do in QCLs because of their long coherence times and short gain recovery times. We propose a fundamentally different approach, based on the self-induced-transparency (SIT) effect, that turns these weaknesses into strengths. Solitons, modelocking, and SIT are all reviewed at the beginning of the talk.

Location: Physics Bldg., Room 401