(1) Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education (Jilin University), Changchun, 130023, P.R. China;(2) College of Physics, Jilin University, Changchun, 130023, P.R. China
Abstract:
We investigate the spontaneously generated coherence (SGC) in a Doppler broadened four-level atomic system driven by two coherent
fields. We plot
the spontaneous emission spectra with different parameters and discuss how
the initial atomic conditions and parameters of both fields change the
number of peaks and dark lines of spontaneous emission spectra. Furthermore, we also show how the spontaneous emission spectrum
is modified by
Doppler effects in the viewed direction. Our results have important
references to the experimental observation of SGC in hot atomic vapors.