Issue 11: Quantum Nanophotonics in Emerging Materials (2019)

Quantum defects by design

Quantum defects by design

Optically active point defects in wide-bandgap crystals are leading building blocks for quantum information technologies including quantum processors, repeaters, simulators, and sensors. Although defects and impurities are ubiquitous in all …

Colour centre generation in diamond for quantum technologies

Colour centre generation in diamond for quantum technologies

Effective methods to generate colour centres in diamond and other wide band-gap materials are essential to the realisation of solid state quantum technologies based on such systems. Such methods have been the subject of intensive research effort in …

Ab initio theory of the nitrogen-vacancy center in diamond

Ab initio theory of the nitrogen-vacancy center in diamond

The nitrogen-vacancy (NV) center in diamond is a solid-state defect qubit with favorable coherence time up to room temperature, which could be harnessed in several quantum-enhanced sensor and quantum communication applications, and has a potential …

Principles and techniques of the quantum diamond microscope

Principles and techniques of the quantum diamond microscope

We provide an overview of the experimental techniques, measurement modalities, and diverse applications of the quantum diamond microscope (QDM). The QDM employs a dense layer of fluorescent nitrogen-vacancy (NV) color centers near the surface of a …

Emerging rare-earth doped material platforms for quantum nanophotonics

Emerging rare-earth doped material platforms for quantum nanophotonics

Rare-earth dopants are arguably one of the most studied optical centers in solids, with applications spanning from laser optoelectronics, biosensing, lighting to displays. Nevertheless, harnessing rare-earth dopants’ extraordinary coherence …

Advances in quantum light emission from 2D materials

Advances in quantum light emission from 2D materials

Two-dimensional (2D) materials are being actively researched due to their exotic electronic and optical properties, including a layer-dependent bandgap, a strong exciton binding energy, and a direct optical access to electron valley index in …

Spin coherent quantum transport of electrons between defects in diamond

Spin coherent quantum transport of electrons between defects in diamond

The nitrogen-vacancy (NV) color center in diamond has rapidly emerged as an important solid-state system for quantum information processing. Whereas individual spin registers have been used to implement small-scale diamond quantum computing, the …

The fine structure of the neutral nitrogen-vacancy center in diamond

The fine structure of the neutral nitrogen-vacancy center in diamond

The nitrogen-vacancy (NV) center in diamond is a widely utilized system due to its useful quantum properties. Almost all research focuses on the negative charge state (NV?) and comparatively little is understood about the neutral charge state (NV0). …

Discovery of ST1 centers in natural diamond

Discovery of ST1 centers in natural diamond

The ST1 center is a point defect in diamond with bright fluorescence and a mechanism for optical spin initialization and readout. The center has impressive potential for applications in diamond quantum computing as a quantum bus to a register of …

Perspectives on deterministic control of quantum point defects by scanned probes

Perspectives on deterministic control of quantum point defects by scanned probes

Control over individual point defects in solid-state systems is becoming increasingly important, not only for current semiconductor industries but also for next generation quantum information science and technologies. To realize the potential of …

New insights into nonclassical light emission from defects in multi-layer hexagonal boron nitride

New insights into nonclassical light emission from defects in multi-layer hexagonal boron nitride

In recent years, mono-layers and multi-layers of hexagonal boron nitride (hBN) have been demonstrated as host materials for localized atomic defects that can be used as emitters for ultra-bright, non-classical light. The origin of the emission, …

Purification of single-photon emission from hBN using post-processing treatments

Purification of single-photon emission from hBN using post-processing treatments

Single-photon emitters (SPEs) in hexagonal boron nitride (hBN) are promising components for on-chip quantum information processing. Recently, large-area hBN films prepared by chemical vapor deposition (CVD) were found to host uniform, high densities …

Coupling of deterministically activated quantum emitters in hexagonal boron nitride to plasmonic surface lattice resonances

Coupling of deterministically activated quantum emitters in hexagonal boron nitride to plasmonic surface lattice resonances

The cooperative phenomena stemming from the radiation field-mediated coupling between individual quantum emitters are presently attracting broad interest for applications related to on-chip photonic quantum memories and long-range entanglement. …