Multi-frequency optical lattice for dynamic lattice-geometry control

11 July 2022

Sketch of the multi-frequency-lattice scheme: the laser beams with different frequency components for three one-dimensional lattices

Photo: UHH

We have developed a new scheme for tunable optical lattices that can switch, ramp or modulate between a honeycomb, boron-nitride and triangular lattice. We use it to prepare higher bands and to introduce a sublattice-modulation spectroscopy. Furthermore, we introduce the geometry phase as a new concept to describe the lattice geometry and generalize it to 3D lattices and quasicrystal lattices.

Marcel N. Kosch, Luca Asteria, Henrik P. Zahn, Klaus Sengstock, Christof Weitenberg, Multi-frequency optical lattice for dynamic lattice-geometry control, Phys. Rev. Research 4, 043083 (2022).

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