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Realization of a stroboscopic optical lattice for cold atoms with subwavelength spacing

TitleRealization of a stroboscopic optical lattice for cold atoms with subwavelength spacing
Publication TypeJournal Article
Year of Publication2020
AuthorsT-C. Tsui, Y.. Wang, S.. Subhankar, , and S.. L. Rolston
JournalPhys. Rev. A
Volume101
Pagination041603
Date PublishedAPR 17
Type of ArticleArticle
ISSN2469-9926
Abstract

Optical lattices are typically created via the ac Stark shift and are limited by diffraction to periodicities >= lambda/2, where. is the wavelength of light used to create them. Lattices with smaller periodicities may be useful for many-body physics with cold atoms and can be generated by stroboscopic application of a phase-shifted lattice with subwavelength features. Here we demonstrate a lambda/4-spaced lattice by stroboscopically applying optical Kronig-Penney-like potentials which are generated using spatially dependent dark states. We directly probe the periodicity of the lambda/4-spaced lattice by measuring the average probability density of the atoms loaded into the ground band of the lattice. We measure lifetimes of atoms in this lattice and discuss the mechanisms that limit the applicability of this stroboscopic approach.

DOI10.1103/PhysRevA.101.041603