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HL: Fachverband Halbleiterphysik
HL 89: Quantum Dots and Wires: Lasing
HL 89.4: Talk
Thursday, March 10, 2016, 17:00–17:15, H13
Lasing at arbitrary frequencies with atoms with broken inversion symmetry and an engineered electromagnetic environment — •Michael Marthaler1, Martin Koppenhöfer1, Karolina Słowik1,2, and Carsten Rockstuhl1 — 1Karlsruhe Institute of Technology — 2Instytut Fizyki, Uniwersytet Mikołaja Kopernika
We consider a two level system with both a transversal and longitudinal coupling to the electromagnetic field. If the longitudinal coupling is sufficiently, strong multi-photon transitions become possible. We assume that the electromagnetic environment has a spectrum with a single sharp resonance which serves as a lasing cavity. Additionally the electromagnetic environment should have a very broad peak at a frequency which differs form the sharp resonance. We use the polaron transformation, and derive a rate equation which can describe the dynamics of our system. Lasing at the frequency of the sharp mode is possible if the energy difference of the atomic transition is similar to the sum of the frequencies of both peaks in the spectral function. This allows for the creation of lasing over a large frequency range.