Cavity-Enhanced Single-Photon Source Based on the Silicon-Vacancy Center in Diamond

Benedikter, Julia; Kaupp, Hanno; Hümmer, Thomas; Liang, Yuejiang; Bommer, Alexander; Becher, Christoph; Krueger, Anke; Smith, Jason M.; Hänsch, Theodor W.; Hunger, David

doi:10.1103/physrevapplied.7.024031

Cited by 92 publications

(91 citation statements)

References 51 publications

(80 reference statements)

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“…Monolithic integration of these emitters in photonic structures helps boost the matter–photon interaction by tailoring the DOS of electromagnetic (EM) modes with respect to the patterned structure and/or cavity, a crucial phenomenon utilized to overcome the issue of low photon collection efficiency from high refractive index materials. In the past 20 years, thanks to the continuous developments of diamond‐based nanofabrication techniques and diamond synthetic methods, SiV − color centers have been successfully integrated in various photonic platforms, including nanopillar, waveguide, fiber‐based optical resonator, and nanocavity embedded in 1D or 2D photonic crystal.…”

Section: Photon‐mediated Spin–spin Interaction In Xv− Centermentioning

confidence: 99%

Building Blocks for Quantum Network Based on Group‐IV Split‐Vacancy Centers in Diamond

2019

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One ultimate goal of quantum information processing is to construct a quantum network for direct sharing of quantum information between distant parties based on stationary qubits for information storage and flying qubits for information transmission. This requires long‐lived quantum memories, efficient light–matter interface, and deterministic quantum gate operations. Among matter qubits, the electron spin of nitrogen vacancy center in diamond is an appealing option for its long coherence time at room temperature, deterministic microwave control, and optical preparation and readout of the qubit. However, its poor optical properties, including weak zero‐phonon‐line emission and large spectral diffusion, limit its potential for large‐scale deployment in quantum nodes. This has motivated the investigation for alternative quantum emitters that combine long‐time memory and coherent optical properties together. The emerging group‐IV split‐vacancy color centers in diamond, such as silicon‐vacancy, germanium‐vacancy, tin‐vacancy, and lead‐vacancy centers, are promising candidates of this ongoing exploration. These quantum emitters simultaneously possess microsecond spin coherence time and optically bright transitions with narrow linewidths. This review reports recent efforts on extending the spin coherence time of these color centers via temperature, strain, and charge control, which paves the road towards constructing solid‐based matter–photon interface for quantum network applications.

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Section: Photon‐mediated Spin–spin Interaction In Xv− Centermentioning

confidence: 99%

Building Blocks for Quantum Network Based on Group‐IV Split‐Vacancy Centers in Diamond

2019

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“…Here, we report on a promising approach for achieving efficient access to individual or small ensembles of ions by coupling ion-doped nanocrystals to a high-finesse fiber-based Fabry-Perot microcavity [21,22]. Fiber cavities can achieve high Purcell factors up to 10 4 , provide open access to the cavity mode for optimal overlap between the ions and the cavity field, and offer full tunability of the resonance frequency to target all regions of the inhomogeneous line.…”

Section: Introductionmentioning

confidence: 99%

Cavity-enhanced spectroscopy of a few-ion ensemble in Eu³⁺:Y₂O₃

et al. 2018

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We report on the coupling of the emission from a single europium-doped nanocrystal to a fiber-based microcavity under cryogenic conditions. As a first step, we study the properties of nanocrystals that are relevant for cavity experiments and show that embedding them in a dielectric thin film can significantly reduce scattering loss and increase the light-matter coupling strength for dopant ions. The latter is supported by the observation of a fluorescence lifetime reduction, which is explained by an increased local field strength. We then couple an isolated nanocrystal to an optical microcavity, determine its size and ion number, and perform cavity-enhanced spectroscopy by resonantly coupling a cavity mode to a selected transition. We measure the inhomogeneous linewidth of the coherent D F 5 0 7 0 -transition and find a value that agrees with the linewidth in bulk crystals, evidencing a high crystal quality. We detect the fluorescence from an ensemble of few ions in the regime of power broadening and observe an increased fluorescence rate consistent with Purcell enhancement. The results represent an important step towards the efficient readout of single rare earth ions with excellent optical and spin coherence properties, which is promising for applications in quantum communication and distributed quantum computation.

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“…Additionally, some applications require diamonds of the size of a few ten nanometers. Examples include applications as fluorescence markers [11,12] or the implementation of SiV centers in photonic structures such as microcavities [13,14] or optical antennas [15,16].…”

Section: Introductionmentioning

confidence: 99%

Strongly inhomogeneous distribution of spectral properties of silicon-vacancy color centers in nanodiamonds

et al. 2018

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The silicon-vacancy (SiV) color center in diamond is a solid-state single photon emitter and spin quantum bit suited as a component in quantum devices. Here, we show that SiV centers in nanodiamonds exhibit a strongly inhomogeneous distribution with regard to the center wavelengths and linewidths of the zero-phonon-line (ZPL) emission at room temperature. We find that the SiV centers separate in two clusters: one group exhibits ZPLs with center wavelengths within a narrow range ≈730-742 nm and broad linewidths between 5 and 17 nm, whereas the second group comprises a very broad distribution of center wavelengths between 715 and 835 nm, but narrow linewidths from below 1 up to 4 nm. Supported by ab initio Kohn-Sham density functional theory calculations we show that the ZPL shifts of the first group are consistently explained by strain in the diamond lattice. Further, we suggest, that the second group showing the strongly inhomogeneous distribution of center wavelengths might be comprised of a new class of silicon-related defects. Whereas single photon emission is demonstrated for defect centers of both clusters, we show that emitters from different clusters show different spectroscopic features such as variations of the phonon sideband spectra and different blinking dynamics.

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Cavity-Enhanced Single-Photon Source Based on the Silicon-Vacancy Center in Diamond

Cited by 92 publications

References 51 publications

Building Blocks for Quantum Network Based on Group‐IV Split‐Vacancy Centers in Diamond

Building Blocks for Quantum Network Based on Group‐IV Split‐Vacancy Centers in Diamond

Cavity-enhanced spectroscopy of a few-ion ensemble in Eu³⁺:Y₂O₃

Strongly inhomogeneous distribution of spectral properties of silicon-vacancy color centers in nanodiamonds

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Cavity-Enhanced Single-Photon Source Based on the Silicon-Vacancy Center in Diamond

Cited by 92 publications

References 51 publications

Building Blocks for Quantum Network Based on Group‐IV Split‐Vacancy Centers in Diamond

Building Blocks for Quantum Network Based on Group‐IV Split‐Vacancy Centers in Diamond

Cavity-enhanced spectroscopy of a few-ion ensemble in Eu3+:Y2O3

Strongly inhomogeneous distribution of spectral properties of silicon-vacancy color centers in nanodiamonds

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Cavity-enhanced spectroscopy of a few-ion ensemble in Eu³⁺:Y₂O₃