Large-scale quantum-emitter arrays in atomically thin semiconductors

Palacios-Berraquero, Carmen; Kara, Dhiren M.; Montblanch, Alejandro R.‐P.; Barbone, Matteo; Latawiec, Pawel; Yoon, Duhee; Ott, A. K.; Lončar, Marko; Ferrari, Andrea C.; Atatüre, Mete

doi:10.1038/ncomms15093

Cited by 498 publications

(669 citation statements)

References 37 publications

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“…The first tests conducted during this work prove that typical SCD nanopillars are robust in the applied transfer process. Using such photonic structures will enhance the PL rates from single NV centers and will also allow for the modification of the excitonic properties of 2D materials via inducing local strain . While traditionally FRET pairs are formed by attaching FRET partners to larger molecules or nanoparticles or directly within a biological specimen, the extension to stable solid‐state systems could enable the realization of scanning devices where FRET is established between a single quantum probe scanning the system under investigation.…”

Section: Discussionmentioning

confidence: 99%

Near‐Field Energy Transfer between a Luminescent 2D Material and Color Centers in Diamond

et al. 2019

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Energy transfer between fluorescent probes lies at the heart of many applications ranging from bio‐sensing and bio‐imaging to enhanced photodetection and light harvesting. In this work, Förster resonance energy transfer (FRET) between shallow defects in diamond—nitrogen‐vacancy (NV) centers—and atomically thin, 2D materials—tungsten diselenide (WSe2)—is studied. By means of fluorescence lifetime imaging, the occurrence of FRET in the WSe2/NV system is demonstrated. Further, it is shown that in the coupled system, NV centers provide an additional excitation pathway for WSe2 photoluminescence. The results constitute the first step toward the realization of hybrid quantum systems involving single‐crystal diamond and 2D materials that may lead to new strategies for studying and controlling spin transfer phenomena and spin valley physics.

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Section: Discussionmentioning

confidence: 99%

Near‐Field Energy Transfer between a Luminescent 2D Material and Color Centers in Diamond

et al. 2019

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“…Recently, it has been discovered that a single-layer TMD can be used as a host material for single quantum emitters [6][7][8][9][10][11][12] at low temperature, which provides a new platform to develop on-chip integrated single photon source and quantum information processing. In addition, the single photon emission has been realized with several approaches, such as heterostructures driven electrically [13], nanoscale strain engineering [14][15][16][17] and sub-nm focused helium ion irradiation [18], which are mostly defect related. Meanwhile, the properties of such a 2D host of quantum emitters have been intensely investigated, including 3D localized trions in heterostuctures [19], manipulation of fine structure splitting (FSS) [20] and photon-phonon interaction [21].…”

Section: Introductionmentioning

confidence: 99%

Identifying defect-related quantum emitters in monolayer WSe2

et al. 2020

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Monolayer transition metal dichalcogenides have recently attracted great interests because the quantum dots embedded in monolayer can serve as optically active single photon emitters. Here, we provide an interpretation of the recombination mechanisms of these quantum emitters through polarization-resolved and magneto-optical spectroscopy at low temperature. Three types of defect-related quantum emitters in monolayer tungsten diselenide (WSe 2 ) are observed, with different exciton g factors of 2.02, 9.36 and unobservable Zeeman shift, respectively. The various magnetic response of the spatially localized excitons strongly indicate that the radiative recombination stems from the different transitions between defect-induced energy levels, valance and conduction bands. Furthermore, the different g factors and zerofield splittings of the three types of emitters strongly show that quantum dots embedded in monolayer have various types of confining potentials for localized excitons, resulting in electron-hole exchange interaction with a range of values in the presence of anisotropy. Our work further sheds light on the recombination mechanisms of defect-related quantum emitters and paves a way toward understanding the role of defects in single photon emitters in atomically thin semiconductors. * xlxu@iphy.ac.cn arXiv:2002.03526v1 [cond-mat.mes-hall]

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“…Subwavelength emitter lattices could also be created using monolayer semiconductors, such as transition metal dichalcogenides (TMDCs) [61][62][63][64][65][66]. Large splitting of the σ þ , σ − valley polarizations due to interaction-induced paramagnetic responses was recently demonstrated in TMDCs [67].…”

Section: Prl 119 023603 (2017) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 99%

Topological Quantum Optics in Two-Dimensional Atomic Arrays

et al. 2017

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We demonstrate that two-dimensional atomic emitter arrays with subwavelength spacing constitute topologically protected quantum optical systems where the photon propagation is robust against large imperfections while losses associated with free space emission are strongly suppressed. Breaking timereversal symmetry with a magnetic field results in gapped photonic bands with nontrivial Chern numbers and topologically protected, long-lived edge states. Due to the inherent nonlinearity of constituent emitters, such systems provide a platform for exploring quantum optical analogs of interacting topological systems. DOI: 10.1103/PhysRevLett.119.023603 Charged particles in two-dimensional systems exhibit exotic macroscopic behavior in the presence of magnetic fields and interactions. These include the integer [1], fractional [2], and spin [3] quantum Hall effects. Such systems support topologically protected edge states [4,5] that are robust against defects and disorder. There is a significant interest in realizing topologically protected photonic systems. Photonic analogs of quantum Hall behavior have been studied in gyromagnetic photonic crystals [6][7][8][9][10][11], helical waveguides [12], two-dimensional lattices of optical resonators [13][14][15] and in polaritons coupled to optical cavities [16]. An outstanding challenge is to realize optical systems which are robust not only to some specific backscattering processes but to all loss processes, including scattering into unconfined modes and spontaneous emission. Another challenge is to extend these effects into a nonlinear quantum domain with strong interactions between individual excitations. These considerations motivate the search for new approaches to topological photonics.In this Letter, we introduce and analyze a novel platform for engineering topological states in the optical domain. It is based on atomic or atomlike quantum optical systems [17], where time-reversal symmetry can be broken by applying magnetic fields and the constituent emitters are inherently nonlinear. Specifically, we focus on optical excitations in a two-dimensional honeycomb array of closely spaced emitters. We show that such systems maintain topologically protected confined optical modes that are immune to large imperfections as well as to the most common loss processes such as scattering into free-space modes. Such modes can be used to control individual atom emission, and to create quantum nonlinearity at a single photon level.The key idea is illustrated in Fig. 1(a). We envision an array with interatomic spacing a and quantization axisẑ

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Large-scale quantum-emitter arrays in atomically thin semiconductors

Cited by 498 publications

References 37 publications

Near‐Field Energy Transfer between a Luminescent 2D Material and Color Centers in Diamond

Near‐Field Energy Transfer between a Luminescent 2D Material and Color Centers in Diamond

Identifying defect-related quantum emitters in monolayer WSe2

Topological Quantum Optics in Two-Dimensional Atomic Arrays

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