Quantum interference via spontaneous emission in a dielectric cavity between photonic crystals

Spontaneous emission in a three-level atom is investigated inside a dielect ric cavity between asymmetrically photonic crystals. The photonic crystals are treated within the effective medium approach and the modes dispersions and field amplitudes are determined. The atomic probability amplitudes and spontaneous emission spectra are evaluated for different atomic and cavity parameters. The probability amplitudes show interference effects due to spo ntaneous emissions from the upper levels to the lower level. Interesting fe atures arise for the variations of the probability amplitudes and spontaneo us emission spectra with the variations of frequency near the photonic crys tals including dark lines and multi-peaks.