Selection and cloning of periodic optical patterns with a cold Rydberg atomic gas

Abstract

We show that periodic optical patterns formed in a cold Rydberg atomic gas via electromagnetically induced transparency (EIT) can be selected by using a weakly modulated control laser field. We also show that the (hexagonal, stripe, square, etc.) patterns prepared in one probe laser field can be cloned onto another one with high fidelity via a double EIT.

Electromagnetically induced moiré optical lattices in a coherent atomic gas

“…Of particular interest in the optics and photonic communities are the two fabricated methods, direct femtosecond-laser writing technique and optically induced ones, with the former being widely used in solid materials where the induced photonic lattices have a permanent refractive index (and the optical and thermal stability of the laser machining method should be carefully processed) and the latter applies both to solid materials and gaseous media. The periodic structures manufactured by the latter method are aliased as electromagnetically induced gratings (EIGs), which are being extensively studied from both theoretical and experimental sides [12][13][14][15][16][17][18][19][20][21][22][23] in recent years, owning to the highly tunable degree of freedom of the induced periodic structures enabled by external and real-time changeable environments for both hot atomic vapours under room temperature and ultracold atoms (like Bose-Einstein condensates) in the nano-Kevin regime.…”

“…Particularly worth mentioning is the fact that, the EIGs with tunable optical properties (lattice depth, periodicity, structural arrangement, etc.) under EIT regime are pushing towards the realization of those application targets [12][13][14][15][16][17][18][19][20][21][22][23].…”