scholarly journals Ordered arrays of InGaN/GaN dot-in-a-wire nanostructures as single photon emitters

2015 ◽  
Author(s):  
Snežana Lazić ◽  
Ekaterina Chernysheva ◽  
Žarko Gačević ◽  
Noemi García-Lepetit ◽  
Herko P. van der Meulen ◽  
...  
Keyword(s):  
Single Photon ◽  
Ordered Arrays ◽  
Single Photon Emitters

scholarly journals Moiré excitons in defective van der Waals heterostructures

2021 ◽  
Vol 118 (32) ◽  
pp. e2105468118
Author(s):  
Hongli Guo ◽  
Xu Zhang ◽  
Gang Lu
Keyword(s):  
Electric Fields ◽  
Single Photon ◽  
Van Der Waals ◽  
Energy Charge ◽  
Defect Engineering ◽  
One Dimensional ◽  
Competition And Cooperation ◽  
Ordered Arrays ◽  
Promising Strategy ◽  
Single Photon Emitters

Excitons can be trapped by moiré potentials in van der Waals (vdW) heterostructures, forming ordered arrays of quantum dots. Excitons can also be trapped by defect potentials as single photon emitters. While the moiré and defect potentials in vdW heterostructures have been studied separately, their interplay remains largely unexplored. Here, we perform first-principles calculations to elucidate the interplay of the two potentials in determining the optoelectronic properties of twisted MoS2/WS2 heterobilayers. The binding energy, charge density, localization, and hybridization of the moiré excitons can be modulated by the competition and cooperation of the two potentials. Their interplay can also be tuned by vertical electric fields, which can either de-trap the excitons or strongly localize them. One can further tailor the interplay of the two potentials via defect engineering to create one-dimensional exciton lattices with tunable orientations. Our work establishes defect engineering as a promising strategy to realize on-demand optoelectronic responses.

scholarly journals First-Principles Identification of Single Photon Emitters Based on Carbon Clusters in Hexagonal Boron Nitride

2021 ◽  
Vol 125 (6) ◽  
pp. 1325-1335 ◽  
Author(s):  
Cesar Jara ◽  
Tomáš Rauch ◽  
Silvana Botti ◽  
Miguel A. L. Marques ◽  
Ariel Norambuena ◽  
...  
Keyword(s):  
Boron Nitride ◽  
First Principles ◽  
Single Photon ◽  
Hexagonal Boron Nitride ◽  
Carbon Clusters ◽  
Single Photon Emitters

Experimental Optical Properties of Single-Photon Emitters in Aluminum Nitride Films

2021 ◽  
Author(s):  
Yongzhou Xue ◽  
Tongbo Wei ◽  
Hongliang Chang ◽  
Dongdong Liang ◽  
Xiuming Dou ◽  
...  
Keyword(s):  
Optical Properties ◽  
Aluminum Nitride ◽  
Single Photon ◽  
Single Photon Emitters

scholarly journals Localization of Narrowband Single Photon Emitters in Nanodiamonds

2016 ◽  
Vol 8 (11) ◽  
pp. 7590-7594 ◽  
Author(s):  
Kerem Bray ◽  
Russell Sandstrom ◽  
Christopher Elbadawi ◽  
Martin Fischer ◽  
Matthias Schreck ◽  
...  
Keyword(s):  
Single Photon ◽  
Single Photon Emitters

scholarly journals Symmetry-tailored patterns and polarizations of single-photon emission

Nanophotonics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 3557-3565
Author(s):  
Guorui Zhang ◽  
Ying Gu ◽  
Qihuang Gong ◽  
Jianjun Chen
Keyword(s):  
Single Photon ◽  
Photon Emission ◽  
Silver Nanowire ◽  
Emission Rates ◽  
Single Photon Emission ◽  
Emission Pattern ◽  
Single Photon Emitters ◽  
Resonant Modes ◽  
Oriented Dipole ◽  
Centrally Symmetric

AbstractDue to small optical mode volumes and linear polarizations of surface-plasmon-polariton (SPP) resonant modes in metallic antennas, it is very difficult to obtain complex emission patterns and polarizations for single-photon emitters. Herein, nonresonant enhancement in a silver nanowire is used to both enhance emission rates and extract a z-oriented dipole, and then the symmetry of metallic nanostructures is proposed to tailor the patterns and polarizations of single-photon emission. The emission pattern of a quantum dot located close to a metallic nanostructure with a symmetric axis is split into multiple flaps. The number of splitting flaps is equal to the order of the symmetric axis. Moreover, the electric vectors of the emitted photons become centrally symmetric about the symmetric axis. The above phenomena are well explained by both a simulation and an image dipole model. The structural-symmetry-tailoring mechanism may open up a new avenue in the design of multifunctional and novel quantum-plasmonic devices.

scholarly journals Radiative properties of quantum emitters in boron nitride from excited state calculations and Bayesian analysis

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Shiyuan Gao ◽  
Hsiao-Yi Chen ◽  
Marco Bernardi
Keyword(s):  
Boron Nitride ◽  
Density Functional ◽  
Single Photon ◽  
Radiative Lifetime ◽  
Radiative Properties ◽  
Data Set ◽  
Radiative Lifetimes ◽  
Emission Energy ◽  
Single Photon Emitters ◽  
Quantum Emitters

AbstractPoint defects in hexagonal boron nitride (hBN) have attracted growing attention as bright single-photon emitters. However, understanding of their atomic structure and radiative properties remains incomplete. Here we study the excited states and radiative lifetimes of over 20 native defects and carbon or oxygen impurities in hBN using ab initio density functional theory and GW plus Bethe-Salpeter equation calculations, generating a large data set of their emission energy, polarization and lifetime. We find a wide variability across quantum emitters, with exciton energies ranging from 0.3 to 4 eV and radiative lifetimes from ns to ms for different defect structures. Through a Bayesian statistical analysis, we identify various high-likelihood charge-neutral defect emitters, among which the native VNNB defect is predicted to possess emission energy and radiative lifetime in agreement with experiments. Our work advances the microscopic understanding of hBN single-photon emitters and introduces a computational framework to characterize and identify quantum emitters in 2D materials.

Single Photon Emitters Coupled to Plasmonic Waveguides: A Review

2021 ◽  
Vol 4 (10) ◽  
pp. 2100057
Author(s):  
Shailesh Kumar ◽  
Sergey I. Bozhevolnyi
Keyword(s):  
Single Photon ◽  
Plasmonic Waveguides ◽  
Single Photon Emitters

scholarly journals Engineering single photon emitters by ion implantation in diamond

2009 ◽  
Vol 95 (18) ◽  
pp. 181109 ◽  
Author(s):  
B. Naydenov ◽  
R. Kolesov ◽  
A. Batalov ◽  
J. Meijer ◽  
S. Pezzagna ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Single Photon ◽  
Single Photon Emitters

InP1−xAsx quantum dots in InP nanowires: A route for single photon emitters

2013 ◽  
Vol 378 ◽  
pp. 519-523 ◽  
Author(s):  
Jean-Christophe Harmand ◽  
Fauzia Jabeen ◽  
Linsheng Liu ◽  
Gilles Patriarche ◽  
Karine Gauthron ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Single Photon ◽  
Single Photon Emitters
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