Controllable probe absorption spectrum via vortex beams excitation in a cascaded atomic system

Abstract

Dynamic control of probe absorption spectrum via vortex beams in multilevel systems has attracted much attention because it provides an avenue to observe unique transport properties. In this paper, we employ experimentally accessible parameters to flexibly control the probe absorption spectrum that shows vortex-induced transparency (VIT) and absorption (VIA) phenomena. Specifically, this system can be served as an optical switch while the vortex beams can act as the control knob, which has the ability to switch from a transparency dip to an absorption peak. Differing from a conventional electromagnetically induced transparency technique, our proposed scheme investigates VIT and VIA by tuning the orbital angular momentum of vortex beams in the resonance and non-resonance cases. Moreover, the collective feature caused by constructive or destructive interference is also studied via adjustable frequency detuning. Our results may provide an efficient approach to study similar phenomena in multilevel quantum systems driven by optical vortex beams.

Coherent manipulation of perfect optical vortex via inelastic four-wave mixing in a cold five-level atomic system

“…In 2015, Radwell et al experimentally observed spatially dependent EIT via using Laguerre-Gaussian (LG) vortex beam to drive cold rubidium atoms [29]. Since then, the interaction between LG beam and atomic system has led to many interesting quantum optical phenomena, such as spatial absorption [30,31], spatially structured Kerr nonlinearity [32], ultraprecise Rydberg atomic localization [33], Ferris wheel patterning [34], vortex four-wave mixing (FWM) [35][36][37][38] and spatially dependent hyper Raman scattering [39]. Such proposals have the obvious advantage of all-optical controllable capability.…”

Coherent Control of Perfect Optical Vortex Through Four-Wave Mixing in an Asymmetric Semiconductor Double Quantum Well

“…Subsequently, numerous schemes for the spatially dependent light-matter interaction induced by LG beams have been proposed in cold atomic ensembles [41], rareearth-doped crystal [42], two-dimensional array of metal-coated dielectric nanosphere [43], semiconductor quantum dots [44], and molecular magnets [45]. Meanwhile, many intriguing quantum optical phenomena have been discovered such as vortex-induced spatial absorption [46,47], spatially structured Kerr nonlinearity [39], ultraprecise Rydberg atomic localization [48], vortex four-wave mixing (FWM) [44,45,49,50,51,52], and spatially dependent hyper Raman scattering [53]. Recently, semiconductor quantum wells (SQWs) have been exploited to explore the transfer and control of mid-infrared LG beams due to their inherent advantages such as high nonlinear optical coefficient and large electric dipole moments of intersubband transitions [54,55,56].…”