Transmission Microscopy with Nanometer Resolution Using a Deterministic Single Ion Source

Jacob, Georg; Groot-Berning, Karin; Wolf, S.; Ulm, Stefan; Couturier, Luc; Dawkins, S. T.; Poschinger, Ulrich; Schmidt-Kaler, F.; Singer, Kilian

doi:10.1103/physrevlett.117.043001

Cited by 60 publications

(69 citation statements)

References 36 publications

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“…The first strategy relies on pre‐detection schemes, to ensure that an individual ion is present in the accelerating tube for delivery on the sample target. A practical implementation of such a system consists of the loading of individual ions in a trap, followed by their subsequent ejection in the accelerating tube . This method enables in principle a fully deterministic implantation process and a highly monochromatic energy output as a consequence of the ion cooling in the trap.…”

Section: Deterministic Placement Of Color Centersmentioning

confidence: 99%

Quantum Micro–Nano Devices Fabricated in Diamond by Femtosecond Laser and Ion Irradiation

et al. 2019

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Diamond has attracted great interest as a quantum technology platform thanks to its optically active nitrogen vacancy (NV) center. The NV's ground state spin can be read out optically, exhibiting long spin coherence times of ≈1 ms even at ambient temperatures. In addition, the energy levels of the NV are sensitive to external fields. These properties make NVs attractive as a scalable platform for efficient nanoscale resolution sensing based on electron spins and for quantum information systems. Diamond photonics enhance optical interactions with NVs, beneficial for both quantum sensing and information. Diamond is also compelling for microfluidic applications due to its outstanding biocompatibility, with sensing functionality provided by NVs. However, it remains a significant challenge to fabricate photonics, NVs, and microfluidics in diamond. In this Progress Report, an overview is provided of ion irradiation and femtosecond laser writing, two promising fabrication methods for diamond‐based quantum technological devices. The unique capabilities of both techniques are described, and the most important fabrication results of color center, optical waveguide, and microfluidics in diamond are reported, with an emphasis on integrated devices aiming toward high performance quantum sensors and quantum information systems of tomorrow.

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Section: Deterministic Placement Of Color Centersmentioning

confidence: 99%

Quantum Micro–Nano Devices Fabricated in Diamond by Femtosecond Laser and Ion Irradiation

et al. 2019

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“…Trap (B) is constructed from x-shaped goldcovered blades at a diagonal distance of 0.96 mm, see ref. [22], and near 397 nm and 866 nm for optical cooling and fluorescence detection with an electron-multiplying charge-coupled device (EMCCD) camera. Additional laser beams at 393 nm, 854 nm and 729 nm allow for optical pumping, sideband spectroscopy and coherent manipulation of the 4s 2 S 1/2 -3d 2 D 5/2 transition, respectively.…”

mentioning

confidence: 99%

Rydberg Excitation of a Single Trapped Ion

et al. 2015

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We demonstrate excitation of a single trapped cold 40 Ca + ion to Rydberg levels by laser radiation in the vacuum-ultraviolet at 122 nm wavelength. Observed resonances are identified as 3d 2 D 3/2 to 51 F, 52 F and 3d 2 D 5/2 to 64 F. We model the lineshape and our results imply a large state-dependent coupling to the trapping potential. Rydberg ions are of great interest for future applications in quantum computing and simulation, in which large dipolar interactions are combined with the superb experimental control offered by Paul traps.PACS numbers: 37.10. Ty, 32.80.Ee, 42.50.Ex The properties of Rydberg atoms are dominated by one electron being in a state of high principal quantum number, which causes long lifetimes and large dipole moments [1,2]. This results in giant dipolar interactions between Rydberg atoms [3] which enable the formation of ultralong-range molecules [4], quantum logic gate operations between two neutral atoms [5,6], and the control of the state of transmitted light through a Rydberg sample at the single photon level [7]. A completely new approach to this field of research is the Rydberg excitation of trapped ions [8,9,10], which aims to combine the long-range Rydberg-blockade mechanism, demonstrated in the case of neutral atoms confined in optical lattices [11,12,13], with the superb level of control over single ions achieved in Paul traps [14,15]. Rydberg ions in Coulomb crystals will allow for shaping localized vibrational modes for quantum simulation and fast parallel execution of quantum gates [16,17]. Further applications are dynamical structural phase transitions and non-equilibrium dynamics driven by Rydberg excitations [18].Two major challenges have to be met in order to access the unique features of Rydberg ions: Firstly, excitation energies are large compared to the case of neutral atoms such that either a vacuum ultraviolet (VUV) laser source [9,19] or multi-step excitation [20] with UV lasers is required. Secondly, the large polarizability of Rydberg states makes them very susceptible to residual electric fields in the Paul trap, where an oscillating field with quadrupolar geometry and gradients of about 10 7 -10 9 V/m 2 provides stable trapping conditions. Ions are confined near the node (field-zero) of the electric quadrupole, nevertheless residual fields at the position of the ion perturb the Rydberg state and lead to a shifted and broadened resonance.In this Letter we present laser excitation of a single trapped cold ion to Rydberg states. Ions are initialized in the metastable 3d 2 D 3/2 or 3d 2 D 5/2 state before they are excited to the 51 F and 52 F (from D 3/2 ) respectivly 64 F (from D 5/2 ) state using vacuum ultraviolet radiation near 122 nm. By applying a state dependent fluorescence measurement following the decay of the Rydberg state, population transfer out of the initial D-state is detected. The polarizability of the Rydberg ion is deduced from the observed line-shift and -broadening, caused by residual electric fields in the trap.Experiments were carried o...

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“…1 and Ref. [24]) to optimize the accuracy of the radial alignment of all four blades with respect to the symmetry trap axis, thus minimizing micro-motion. Differential charging of the surfaces and residual imperfections of the device are compensated by correction voltages to center the ions at the RF-node.…”

Section: Linear Segmented Ion Trap For Calcium Ionsmentioning

confidence: 99%

Addressing single trapped ions for Rydberg quantum logic

Bachor

Feldker

Walz

et al. 2016

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. We demonstrate the excitation of ions to the Rydberg state 22F by vacuum ultraviolet radiation at a wavelength of 123 nm combined with the coherent manipulation of the optical qubit transition in 40 Ca + . With a tightly focused beam at 729 nm wavelength we coherently excite a single ion from a linear string into the metastable 3D 5/2 state before a VUV pulse excites it to the Rydberg state. In combination with ion shuttling in the trap, we extend this approach to the addressed excitation of multiple ions. The coherent initialization as well as the addressed Rydberg excitation are key prerequisites for more complex applications of Rydberg ions in quantum simulation or quantum information processing.

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Transmission Microscopy with Nanometer Resolution Using a Deterministic Single Ion Source

Cited by 60 publications

References 36 publications

Quantum Micro–Nano Devices Fabricated in Diamond by Femtosecond Laser and Ion Irradiation

Quantum Micro–Nano Devices Fabricated in Diamond by Femtosecond Laser and Ion Irradiation

Rydberg Excitation of a Single Trapped Ion

Addressing single trapped ions for Rydberg quantum logic

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