Strongly coupled cold atoms in bilayer dense lattices

Abstract

We theoretically investigate the optical response of many cold atoms within a pair of identical planar lattices mostly in a dense regime using microscopic electrodynamics numerical simulations. We find cooperative optical properties of the double atomic lattices to a normal incidence of low-intensity radiation at particular ranges of sample parameters. The main findings are that resonance shifts, linewidths, and transmittance could be engineered by varying layer-to-layer distance, lattice constant, and parameters for incident light. We also propose a bilayer atomic lattice could be modeled as two effective superatoms. Simulation results qualitatively agree with the ones from an isotropic infinite lattice model in the ranges of external parameters for which a mean-field approximation is not valid. Hopefully, our bilayer lattice samples might be exploited for implementing an optical switch and a photonic device in quantum computing.

Quantum and nonlinear effects in light transmitted through planar atomic arrays

“…To calculate the coherent transmission T coh (plotted as optical depth OD coh Àlog T coh ), we substitute the first four terms on the right hand side of Eqs. (21) into (33). This gives quantum T QM coh or semiclassical T SC coh coherent transmission, depending on whether we use the solutions to QME or SCEs .…”

“…To calculate the incoherent contribution to the transmission, we replace the two-field expectation in Eqs. (33) with (22). Evaluating Eq.…”

“…A particularly promising system to explore and utilize strong light-induced DD interactions is a regular planar array of scatterers, such as atoms. As shown both theoretically and experimentally, in the linear low-excitation limit these manifest a wealth of phenomena, e.g., subdiffraction features 9,10 , nontrivial topological phases 11,12 , transmission varying from complete reflection to full transparency [13][14][15][16][17][18][19] , narrow resonances, and subradiance [15][16][17][20][21][22][23][24][25][26][27] , as well as quantum technological applications 28,29 and other collective effects [30][31][32][33][34][35] .…”

Light propagation in systems involving two-dimensional atomic lattices

“…Aside from 3D gaseous samples, cooperation of atoms in a 2D lattice has attracted recent interest [19][20][21][22][23][24][25][26][27][28][29]. In fact, studies of metamaterials with 2D arrays of dipoles that mix electric and magnetic dipole moments have made similar theoretical points earlier [30], and seem to be ahed of atomic lattices even in the experiments [31], but we focus on the simpler case of ordinary atoms.…”

Quantum and Nonlinear Effects in Light Transmitted through Planar Atomic Arrays

“…One particularly promising system to explore and utilize strong light-induced DD interactions is a regular planar array of scatterers such as atoms. In the linear low-excitation limit these manifest, as shown both theoretically and experimentally, a wealth of phenomena, e.g., subdiffraction features [8][9][10], nontrivial topological phases [11,12], transmission varying from complete reflection to full transparency [13][14][15][16][17][18][19], narrow resonances and subradiance [15][16][17][20][21][22][23][24][25][26][27], as well as quantum technological applications [28,29] and other collective effects [30][31][32][33][34][35][36].…”