Photonic crystals doped with resonant atoms allow for uniquely advantageous nonlinear modes of optical propagation. The first type of mode is self-induced transparency (SIT) solitons and multidimensional localized “bullets” propagating at photonic-bandgap frequencies. Such modes can exist even at ultraweak intensities (few photons) and therefore differ substantially either from solitons in Kerr-nonlinear photonic crystals or from SIT solitons in uniform media. The second type of mode is cross coupling between pulses exhibiting electromagnetically induced transparency and SIT gap solitons. We show that extremely strong correlations (giant cross-phase modulation) can be formed between the two pulses. These features may find applications in high-fidelity classical and quantum optical communications.
© 2002 Optical Society of America
Gershon Kurizki, David Petrosyan, Tomas Opatrny, Miriam Blaauboer, and Boris Malomed, "Self-induced transparency and giant nonlinearity in doped photonic crystals," J. Opt. Soc. Am. B 19, 2066-2074 (2002)