%ASubhankar, S.%ABienias, P.%ATitum, P.%ATsui, T-C%AWang, Y.%AGorshkov, A.%ARolston, S.%APorto, J.%BJournal Name: New Journal of Physics; Journal Volume: 21; Journal Issue: 11; Related Information: CHORUS Timestamp: 2021-11-24 10:48:31 %D2019%IIOP Publishing %JJournal Name: New Journal of Physics; Journal Volume: 21; Journal Issue: 11; Related Information: CHORUS Timestamp: 2021-11-24 10:48:31 %K %MOSTI ID: 10303130 %PMedium: X %TFloquet engineering of optical lattices with spatial features and periodicity below the diffraction limit %X
Floquet engineering or coherent time-periodic driving of quantum systems has been successfully used to synthesize Hamiltonians with novel properties. In ultracold atomic systems, this has led to experimental realizations of artificial gauge fields, topological bandstructures, and observation of dynamical localization, to name a few. Here we present a Floquet-based framework to stroboscopically engineer Hamiltonians with spatial features and periodicity below the diffraction limit of light used to create them by time-averaging over various configurations of a 1D optical Kronig–Penney (KP) lattice. The KP potential is a lattice of narrow subwavelength barriers spaced by half the optical wavelength (