Modulation-assisted tunneling in laser-fabricated photonic Wannier–Stark ladders

@article{Mukherjee2015ModulationassistedTI,
  title={Modulation-assisted tunneling in laser-fabricated photonic Wannier–Stark ladders},
  author={Sebabrata Mukherjee and Alexander Spracklen and Debaditya Choudhury and Nathan Goldman and Patrik {\"O}hberg and Erika Andersson and Robert R. Thomson},
  journal={New Journal of Physics},
  year={2015},
  volume={17}
}
We observe Wannier–Stark (W–S) localization in curved photonic lattices, realized using arrays of evanescently coupled optical waveguides. By correctly tuning the strength of inter-site coupling in the lattice, we observe that W–S states become increasingly localized, and eventually fully localized to one site, as the curvature of the lattice is increased. We then demonstrate that tunneling can be successfully restored in the lattice by applying a resonant sinusoidal modulation to the lattice… 
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References

SHOWING 1-10 OF 48 REFERENCES

Observation of a Localized Flat-Band State in a Photonic Lieb Lattice.

The first experimental realization of a dispersionless state is demonstrated, in a photonic Lieb lattice formed by an array of optical waveguides, which opens an exciting door towards quantum simulation of flat-band models in a highly controllable environment.

Observation of photon-assisted tunneling in optical lattices.

Tuning suppression and photon-assisted tunneling of Bose-Einstein condensates in an optical lattice subjected to a constant force plus a sinusoidal shaking are observed.

Realization of the Hofstadter Hamiltonian with ultracold atoms in optical lattices.

It is shown that for two atomic spin states with opposite magnetic moments, the experimental implementation of an optical lattice that allows for the generation of large homogeneous and tunable artificial magnetic fields with ultracold atoms naturally realizes the time-reversal-symmetric Hamiltonian underlying the quantum spin Hall effect.

Realizing the Harper Hamiltonian with laser-assisted tunneling in optical lattices.

The Harper Hamiltonian for neutral particles in optical lattices is implemented using laser-assisted tunneling and a potential energy gradient provided by gravity or magnetic field gradients to describe the motion of charged particles in strong magnetic fields.

Photon-assisted-tunneling toolbox for quantum simulations in ion traps

We describe a versatile toolbox for the quantum simulation of many-body lattice models, capable of exploring the combined effects of background Abelian and non-Abelian gauge fields, bond and site…

Creating artificial magnetic fields for cold atoms by photon-assisted tunneling

This paper proposes a simple setup for introducing an artificial magnetic field for neutral atoms in 2D optical lattices. This setup is based on the phenomenon of photon-assisted tunneling and…

Analog of photon-assisted tunneling in a Bose-Einstein condensate.

Under experimentally accessible conditions there exist well-developed half-integer Shapiro-like resonances in many-body tunneling of a small Bose-Einstein condensate in a periodically modulated, tilted double-well potential.

Photon-mediated sequential resonant tunneling in intense terahertz electric fields.

We have measured the current-voltage (I-V) characteristic of semiconductor superlattices in the presence of intense terahertz electric fields produced by free-electron lasers. The nonlinear I-V…

Direct observation of Landau-Zener tunneling in a curved optical waveguide coupler

An electromagnetic realization of Landau-Zener (LZ) tunneling is experimentally demonstrated in femtosecond-laser written waveguide couplers with a cubically bent axis. Quantitative measurements of…

Peierls substitution in an engineered lattice potential.

A one-dimensional lattice derived purely from effective Zeeman shifts resulting from a combination of Raman coupling and radio-frequency magnetic fields is described, with experimentally realizing the Peierls substitution for ultracold neutral atoms.