Spatiotemporal propagation of light pulses in a one-dimensional photonic crystal interacting with a squeezed vacuum

This work explores the transmission and reflection behavior of light beams in a one-dimensional defect photonic crystal embedded with a V-type three-level atomic system, which interacts with two independent broadband squeezed reservoirs. The system is driven by a strong composite optical vortex light (COVL) field alongside a weak probe beam. Emphasis is placed on the role of COVL’s azimuthal modulation in shaping the photonic crystal’s optical response. We analyze how the winding number of the vortex light modulates the absorption spectrum and assess the influence of key system parameters, such as the coupling field intensity and incoherent pumping rate. Our results demonstrate that these factors, especially azimuthal modulation, can significantly modify the transmission spectrum, even in the regime where absorption is negligible. This study deepens our insight into light-matter interactions within structured quantum media and suggests new avenues for photonic device applications in communication and sensing.