Atomic ensemble coupled to band edge of photonic crystal waveguide
Martedì 12 Giugno alle 15:30 in aula E, il Professor L.-C. Kwek (Centre for Quantum Technologies, National University of Singapore, Singapore) terrà un seminario dal titolo Atomic ensemble coupled to band edge of photonic crystal waveguide
Long-range coherent dipole-dipole interactions can arise amongst an ensemble of two-level atoms coupled to a one-dimensional photonic crystal waveguide. We show that the long-range interactions can dramatically alter the linear and nonlinear optical behavior, as compared to a typical atomic ensemble. In particular, in the linear regime, we find that the transmission spectrum reveals multiple transmission dips, whose properties we show how to characterize. In the many-photon regime the system response can be highly non-linear, and under certain circumstances the ensemble can behave like a single two-level system, which is only capable of absorbing and emitting a single excitation at a time.
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