Berlin 2005 – scientific programme

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Q: Quantenoptik und Photonik

Q 47: Photonik in komplexen & periodischen Strukturen

Q 47.6: Talk

Tuesday, March 8, 2005, 15:15–15:30, HU 2014a

Laser emission from quantum graphs — •Carlos Viviescas und Javier Madroñero — Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, D-01187 Dresden

We study the electromagnetic field dynamics in quantum graphs connected to external leads, and in the presence of an active medium which provides amplification. We derive nonlinear equations describing the coupled dynamics of the field and of the active medium. For sufficiently strong pumping we find laser emission from the quantum graph. Above the laser threshold we evaluate the emission spectra of quantum graphs, structured by resonances which obey Random Matrix statistics. We expect our theory to be suitable for laser operation in disordered dielectrics, so-called random lasers.