A subradiant optical mirror formed by a single structured atomic layer
- URL: http://arxiv.org/abs/2001.00795v1
- Date: Fri, 3 Jan 2020 11:55:05 GMT
- Title: A subradiant optical mirror formed by a single structured atomic layer
- Authors: Jun Rui, David Wei, Antonio Rubio-Abadal, Simon Hollerith, Johannes
Zeiher, Dan M. Stamper-Kurn, Christian Gross, Immanuel Bloch
- Abstract summary: We report on the direct observation of the cooperative subradiant response of a two-dimensional (2d) square array of atoms in an optical lattice.
We show that the array acts as an efficient mirror formed by only a single monolayer of a few hundred atoms.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Efficient and versatile interfaces for the interaction of light with matter
are an essential cornerstone for quantum science. A fundamentally new avenue of
controlling light-matter interactions has been recently proposed based on the
rich interplay of photon-mediated dipole-dipole interactions in structured
subwavelength arrays of quantum emitters. Here we report on the direct
observation of the cooperative subradiant response of a two-dimensional (2d)
square array of atoms in an optical lattice. We observe a spectral narrowing of
the collective atomic response well below the quantum-limited decay of
individual atoms into free space. Through spatially resolved spectroscopic
measurements, we show that the array acts as an efficient mirror formed by only
a single monolayer of a few hundred atoms. By tuning the atom density in the
array and by changing the ordering of the particles, we are able to control the
cooperative response of the array and elucidate the interplay of spatial order
and dipolar interactions for the collective properties of the ensemble. Bloch
oscillations of the atoms out of the array enable us to dynamically control the
reflectivity of the atomic mirror. Our work demonstrates efficient optical
metamaterial engineering based on structured ensembles of atoms and paves the
way towards the controlled many-body physics with light and novel light-matter
interfaces at the single quantum level.
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