Nanoscale continuous quantum light sources based on driven dipole emitter arrays

Holzinger, Raphael; Moreno-Cardoner, M.; Ritsch, Helmut

doi:10.1063/5.0049270

Cited by 26 publications

(15 citation statements)

References 74 publications

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“…We have demonstrated that geometry can be used to alter the collective optical properties of the array and shape the temporal profile and statistics of the emitted light. This presents the opportunity to use atomic arrays to produce directional single photons 58 , correlated photons 13 , or superradiant lasers 59 . Alternatively, measurement of the emitted light provides a window into the complex evolution of the atomic system, and directional detection may enable heralded production of many-body entangled dark states.…”

Section: Resultsmentioning

confidence: 99%

Universality of Dicke superradiance in arrays of quantum emitters

Masson

Asenjo-Garcı́a

2022

Nat Commun

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Dicke superradiance is an example of emergence of macroscopic quantum coherence via correlated dissipation. Starting from an initially incoherent state, a collection of excited atoms synchronizes as they decay, generating a macroscopic dipole moment and emitting a short and intense pulse of light. While well understood in cavities, superradiance remains an open problem in extended systems due to the exponential growth of complexity with atom number. Here we show that Dicke superradiance is a universal phenomenon in ordered arrays. We present a theoretical framework – which circumvents the exponential complexity of the problem – that allows us to predict the critical distance beyond which Dicke superradiance disappears. This critical distance is highly dependent on the dimensionality and atom number. Our predictions can be tested in state of the art experiments with arrays of neutral atoms, molecules, and solid-state emitters and pave the way towards understanding the role of many-body decay in quantum simulation, metrology, and lasing.

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Section: Resultsmentioning

confidence: 99%

Universality of Dicke superradiance in arrays of quantum emitters

Masson

Asenjo-Garcı́a

2022

Nat Commun

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“…Meanwhile, atoms trapped in a periodic subwavelength planar optical lattice have been shown in experiments to exhibit collective, spatially delocalized subradiant optical excitations [12], and related experiments on collective excitations have also been performed in other periodic structures [13,14]. Cooperatively responding optical systems of subwavelength atomic arrays have inspired a large body of theoretical studies, with examples including manipulation of subradiance [15][16][17][18], single-photon storage [19][20][21], atom and excitation statistics [22,23], optical cavity-like phenomena [24][25][26], collective antibunching [27][28][29], connected arrays [30], optomechanics [31], and parity-time symmetry breaking [32]. In particular, it was recently shown how a bilayer array of atoms could form a Huygens' surface via emerging collective excitations that mimic an array of crossed electric and magnetic dipoles, even when the atoms only undergo electric dipole transitions [33,34].…”

Section: Introductionmentioning

confidence: 99%

Optical magnetism and wavefront control by arrays of strontium atoms

Ballantine¹,

Wilkowski²,

Ruostekoski³

2022

Preprint

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By analyzing the parameters of electronic transitions, we show how bosonic Sr atoms in planar optical lattices can be engineered to exhibit optical magnetism and other higher-order electromagnetic multipoles that can be harnessed for wavefront control of incident light. Resonant λ 2.6µm light for the 3 D1 → 3 P0 transition mediates cooperative interactions between the atoms while the atoms are trapped in a deeply subwavelength optical lattice. The atoms then exhibit collective excitation eigenmodes, e.g., with a strong cooperative magnetic response at optical frequencies, despite individual atoms having negligible coupling to the magnetic component of light. We provide a detailed scheme to utilize excitations of such cooperative modes consisting of arrays of electromagnetic multipoles to form an atomic Huygens' surface, with complete 2π phase control of transmitted light and almost no reflection, allowing nearly arbitrary wavefront shaping. In the numerical examples, this is achieved by controlling the atomic level shifts of Sr with off-resonant 3 P J → 3 D1 transitions, which results in a simultaneous excitation of arrays of electric dipoles and electric quadrupoles or magnetic dipoles. We demonstrate the wavefront engineering for a Sr array by realizing the steering of an incident beam and generation of a baby-Skyrmion texture in the transmitted light via a topologically nontrivial transition of a Gaussian beam to a Poincaré beam, which contains all possible polarizations in a single cross-section.

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“…Subradiant states in free-space 2D arrays of atoms [1-3, 6, 8, 10, 11, 16, 18, 24, 32, 46-48] are promising for light storage due to their isolation from the environment, but, unlike in the case of 1D chains of atoms [49,50], in 2D arrays strongly subradiant modes cannot be directly driven by incident fields. Previous proposals have demonstrated how such modes can be excited in the steady state, using atomic level shifts to control the orientation of the dipoles [3,31], or by optimizing driving [51].…”

Section: Introductionmentioning

confidence: 99%

Unidirectional absorption, storage, and emission of single photons in a collectively responding bilayer atomic array

Ballantine¹,

Ruostekoski²

2021

Preprint

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Two-dimensional regular arrays of atoms are a promising platform for quantum networks, with collective subradiant states providing long-lived storage and collimated emission allowing for natural coherent links between arrays in free space. However, a single-layer lattice can only efficiently absorb or emit light symmetrically in the forward and backward directions. Here we show how a bilayer lattice can absorb a single photon either incident from a single direction or an arbitrary superposition of forward and backward propagating components. The excitation can be stored in a subradiant state, transferred coherently between different subradiant states, and released, again in an arbitrary combination of forward and backward propagating components. We explain the directionality of single and bilayer arrays by a symmetry analysis based on the scattering parities of different multipole radiation components of collective excitations. The collective modes may exhibit the conventional half-wave loss of fields near the array interface or completely eliminate it. The proposed directional control of absorption and emission paves the way for effective one-dimensional quantum communication between multiple arrays, with single-photons propagating backward and forward between quantum information-processing and storage stages.

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Nanoscale continuous quantum light sources based on driven dipole emitter arrays

Cited by 26 publications

References 74 publications

Universality of Dicke superradiance in arrays of quantum emitters

Universality of Dicke superradiance in arrays of quantum emitters

Optical magnetism and wavefront control by arrays of strontium atoms

Unidirectional absorption, storage, and emission of single photons in a collectively responding bilayer atomic array

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