Review on the quantum emitters in two-dimensional materials

Abstract

The solid state single photon source is fundamental key device for application of quantum communication, quantum computing, quantum information and quantum precious metrology. After years of searching, researchers have found the single photon emitters in zero-dimensional quantum dots (QDs), one-dimensional nanowires, three-dimensional wide bandgap materials, as well as two-dimensional (2D) materials developed recently. Here we will give a brief review on the single photon emitters in 2D van der Waals materials. We will firstly introduce the quantum emitters from various 2D materials and their characteristics. Then we will introduce the electrically driven quantum light in the transition metal dichalcogenides (TMDs)-based light emitting diode (LED). In addition, we will introduce how to tailor the quantum emitters by nanopillars and strain engineering, the entanglement between chiral phonons (CPs) and single photon in monolayer TMDs. Finally, we will give a perspective on the opportunities and challenges of 2D materials-based quantum light sources.

2D Metallic Transition‐Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications

“…Compared to bulk counterparts, 2D materials possess unusual properties and promising applications owing to the reducing dimensionality and/or quantum confinement effect. [1][2][3][4][5][6] 2D materials have been rapidly expanded to graphene, [7,8] hexagonal boron nitride (BN), [9,10] black phosphorus, [11] borophene, [12] silicene, [13,14] and transition metal dichalcogenides (TMDs). [15][16][17][18][19][20] As the key members of 2D materials, TMDs with the formula MX 2 (where M is a transition metal atom of group IV-VIII and X is the…”

“…Compared to bulk counterparts, 2D materials possess unusual properties and promising applications owing to the reducing dimensionality and/or quantum confinement effect. [ 1–6 ] 2D materials have been rapidly expanded to graphene, [ 7,8 ] hexagonal boron nitride (BN), [ 9,10 ] black phosphorus, [ 11 ] borophene, [ 12 ] silicene, [ 13,14 ] and transition metal dichalcogenides (TMDs). [ 15–20 ] As the key members of 2D materials, TMDs with the formula MX 2 (where M is a transition metal atom of group IV–VIII and X is the chalcogen atom including S, Se, or Te) have recently drawn intense scientific and engineering interest because of the advantages of diverse crystal structures, ultrathin thickness, layer‐dependent band gap, as well as new functional applications in electronics, optoelectronics, catalysis, energy storage, and many others.…”

Chip-Scale Quantum Emitters

“…Easier coupling with a lensed fiber was achieved by tapering the waveguide's ends. Ren and co-workers provided a brief review on single-photon emitters in 2D van der Waals materials [70]. In their report, the quantum emitters from various 2D materials were firstly introduced and their characteristics presented.…”

“…Furthermore, they introduced the quantum emitter tailoring process by nanopillars, strain engineering, the entanglement between chiral phonons (CPs) and single photons in monolayer TMDs. Finally, a perspective on the opportunities and challenges of 2D material-based quantum light sources was presented [70]. Paur et al [71] pointed out that achieving optically active and electrically controlled quantum emitters makes these materials attractive for applications ranging from quantum communication and optoelectronics to high resolution metrology.…”

MoS2 Homojunctions Transistors Enabled by Dimension Tailoring Strategy

“…Notably, the atom thickness of 2D materials, such as MoS 2 , offer a possible solution to fabricate ultrathin high-performance transistors, as well as the electronic circuits. [6][7][8][9][10][11] 2D materials are immune to surface roughness induced carrier scattering, which can overcome the limitation of channel thickness variation confronted by silicon-based MOSFETs. On the other hand, the lateral confinement in 2D materials has also been proved to be an effective way for band modulation.…”