Two-dimensional atom localization and formation of waveguide channels using Bragg diffraction law

Atoms of four-level atomic medium are doped in a crystal slab of silica which is immersed in a four-level atomic medium. We incorporated Bragg law in the Rabi frequencies of the driving fields and obtained absorption spectrum which exhibits atom localization inside the crystal plane and generation of waveguide channels. Varying the Bragg angle theta, leads to a number of localized peaks and craters. The number of peaks decreases as we increase the Bragg angle theta from pi/8 to pi/2 and the peaks disappear beyond this angle. The localization probability is independent of the Bragg angle, while the spatial resolution varies with change in Bragg angle. However, the probe detuning and amplitudes of Rabi frequencies change the localization probability. Inside the optical lattice of the silica crystal, waveguide channels and particle traps are generated which may be utilized to guide electromagnetic radiations and trap quantum particles. This work is useful for coherent control information of crystal planes, optical trapping, waveguide channels of nano crystals and data storage.

Automated summary

This study doped a four-level atomic medium into a silica crystal slab and achieved atom localization and generation of waveguide channels by varying the Bragg angle. The generated waveguide channels and particle traps can be used for guiding electromagnetic radiations and trapping quantum particles, which have important implications for optical trapping and data storage.