Three level media in optical cavities
When a medium is driven by two laser beams at resonance with two separate atomic transitions, electromagnetically induced transparency takes place (Figure 8). When a medium with such properties is enclosed in an optical cavity (Figure 9) then diffraction or dispersion generate two separate branches of solutions leading to hexagonal, stripe and honeycomb structures to compete with each other (Figure 10). Complex configurations of cavity solitons are also found.
|Fig. 8: Absorption as a function of the detuning (blue curve) under the action of two laser beams||Fig. 9: A three level atomic medium (lower panel) in a optical cavity||Fig. 10: Two stable spatial structures of competing patterns|
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M. Eslami, M. Khanmohammadi, R. Kheradmand and G.-L. Oppo, “Optical turbulence and transverse rogue waves in a cavity with triple quantum dot molecules”, Phys. Rev. A 96, 033836 (2017).
M. Eslami, R. Kheradmand and G.-L. Oppo, “Complex structures in cavities with media displaying EIT: coexistence, defects and selection mechanism”, J. Phys. B 53, 075402 (2020).