Diamond Nanophotonics

Aharonovich, Igor; Neu, Elke

doi:10.1002/adom.201400189

Cited by 284 publications

(239 citation statements)

References 166 publications

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“…Readout of such local information can be greatly augmented by coupling these point defects to high-quality optical cavities which can enhance their optical emission properties, enabling large increases in the emission rate into their ZPLs (15)(16)(17)(18). A number of groups have fabricated photonic crystal cavities in SiC, achieving passively measured (i.e., without emitters in the cavity) quality factors, Q, at telecom frequencies of 10 3 -10 4 in 3C-SiC (19)(20)(21) and 6H-SiC and of ∼7 × 10 4 in amorphous SiC (22).…”

mentioning

confidence: 99%

Selective Purcell enhancement of two closely linked zero-phonon transitions of a silicon carbide color center

Bracher

Zhang

2017

Proc. Natl. Acad. Sci. U.S.A.

107

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Point defects in silicon carbide are rapidly becoming a platform of great interest for single-photon generation, quantum sensing, and quantum information science. Photonic crystal cavities (PCCs) can serve as an efficient light–matter interface both to augment the defect emission and to aid in studying the defects’ properties. In this work, we fabricate 1D nanobeam PCCs in 4H-silicon carbide with embedded silicon vacancy centers. These cavities are used to achieve Purcell enhancement of two closely spaced defect zero-phonon lines (ZPL). Enhancements of >80-fold are measured using multiple techniques. Additionally, the nature of the cavity coupling to the different ZPLs is examined.

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confidence: 99%

Selective Purcell enhancement of two closely linked zero-phonon transitions of a silicon carbide color center

Bracher

Zhang

2017

Proc. Natl. Acad. Sci. U.S.A.

107

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“…[4][5][6] In addition, they can host photostable optically active defects, such as the nitrogen vacancy (NV) or the silicon vacancy (SiV) that have already been shown as effective bioimaging probes. [7][8][9][10] Moreover, single NV defects can be leveraged for high resolution magnetometry and sensing of single spins and individual biomolecules with unprecedented sensitivity.…”

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confidence: 99%

Enhanced photoluminescence from single nitrogen-vacancy defects in nanodiamonds coated with phenol-ionic complexes

et al. 2015

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Fluorescent nanodiamonds are attracting major attention in the field of bio-sensing and biolabeling. In this work we demonstrate a robust approach to surface functionalize individual nanodiamonds with metal-phenolic networks that enhance the photoluminescence from single nitrogen vacancy (NV) centers. We show that single NV centres in the coated nanodiamonds also exhibit shorter lifetimes, opening another channel for high resolution sensing. We propose that the nanodiamond encapsulation suppresses the non-radiative decay pathways of the NV color centers. Our results provide a versatile and assessable way to enhance photoluminescence from nanodiamond defects that can be used in a variety of sensing and imaging applications.

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“…purity. Crystal color centers in diamond [27], silicon carbide [28], or other inorganic crystals [29] have been investigated but currently suffer from low brightness due to the presence of other decay channels or other crystal defects [22]. Note that approaches using single molecules [30] and, recently, two-dimensional monolayers [22] have shown promise for high brightness.…”

Section: Introductionmentioning

confidence: 99%

Memory-assisted quantum key distribution resilient against multiple-excitation effects

Piparo

Sinclair

Razavi

2017

Quantum Sci. Technol.

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Memory-assisted measurement-device-independent quantum key distribution (MA-MDI-QKD) has recently been proposed as a technique to improve the rate-versus-distance behavior of QKD systems by using existing, or nearly-achievable, quantum technologies. The promise is that MA-MDI-QKD would require less demanding quantum memories than the ones needed for probabilistic quantum repeaters. Nevertheless, early investigations suggest that, in order to beat the conventional memoryless QKD schemes, the quantum memories used in the MA-MDI-QKD protocols must have high bandwidth-storage products and short interaction times. Among different types of quantum memories, ensemble-based memories offer some of the required specifications, but they typically suffer from multiple excitation effects. To avoid the latter issue, in this paper, we propose two new variants of MA-MDI-QKD both relying on single-photon sources for entangling purposes. One is based on known techniques for entanglement distribution in quantum repeaters. This scheme turns out to offer no advantage even if one uses ideal single-photon sources. By finding the root cause of the problem, we then propose another setup, which can outperform single memory-less setups even if we allow for some imperfections in our single-photon sources. For such a scheme, we compare the key rate for different types of ensemble-based memories and show that certain classes of atomic ensembles can improve the rate-versus-distance behavior.

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Diamond Nanophotonics

Abstract: The burgeoning field of nanophotonics has grown to be a major research area, primarily because of the ability to control and manipulate single quantum systems (emitters)

Cited by 284 publications

References 166 publications

Selective Purcell enhancement of two closely linked zero-phonon transitions of a silicon carbide color center

Selective Purcell enhancement of two closely linked zero-phonon transitions of a silicon carbide color center

Enhanced photoluminescence from single nitrogen-vacancy defects in nanodiamonds coated with phenol-ionic complexes

Memory-assisted quantum key distribution resilient against multiple-excitation effects

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