Electrically driven single-photon emission from an isolated single molecule

Zhang, Li; Yu, Yunjie; Chen, Liuguo; Luo, Yang; Yang, Ben; Kong, Fan-Fang; Chen, Gong; Zhang, Yang; Zhang, Qiang; Luo, Yi; Yang, Jinlong; Dong, Zhen‐Chao; Hou, Jian

doi:10.1038/s41467-017-00681-7

Cited by 115 publications

(109 citation statements)

References 49 publications

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“…The experimental and theoretical findings presented in this work likewise shed light onto the notion of electronic decoupling, which is generally used to characterize the extent of hybridization of an adsorbate with the hosting substrate. The weak hybridization is often attributed to the submolecular resolution in STM images of adsorbed molecules, [ 206–210 ] the occurrence of electronic states, [ 211–219 ] vibrational quanta, [ 220–224 ] and fluorescence photons [ 225–237 ] with particularly sharp spectroscopic line shapes. In the case of graphene, the results summarized here are able to provide a more precise and quantitative description of the hybridization.…”

Section: Summary and Concluding Remarksmentioning

confidence: 99%

Local Probes of Graphene Lattice Dynamics

2020

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Inelastic electron tunneling spectroscopy with a scanning tunneling microscope is a powerful method to excite and detect vibrational quanta with atomic resolution. The focus of this review article is on the local spectroscopy of graphene phonons. The experimental observation of their spectroscopic signatures together with theoretical modeling highlight the importance of the graphene–surface as well as the graphene–tip hybridization, the electron–phonon coupling strength, phonon‐mediated tunneling, local doping profiles, and the phonon density of state for the measured signal. Meanwhile, a comprehensive understanding of the underlying mechanisms has been attained and justifies an overview on available findings.

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Section: Summary and Concluding Remarksmentioning

confidence: 99%

Local Probes of Graphene Lattice Dynamics

2020

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“…The dynamic behaviour as described can be analysed by a three-state kinetic model 20 ) that can be obtained from fitting the transients in Fig. 3.…”

Section: Figure 4 | Model Of Exciton Formation and Recombination Dynamentioning

confidence: 99%

Single Charge and Exciton Dynamics Probed by Molecular-Scale-Induced Electroluminescence

et al. 2018

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Excitons and their constituent charge carriers play the central role in electroluminescence mechanisms determining the ultimate performance of organic optoelectronic devices. The involved processes and their dynamics are often studied with time-resolved techniques limited by spatial averaging that obscures the properties of individual electron-hole pairs. Here, we overcome this limit and characterize single charge and exciton dynamics at the nanoscale by using time-resolved scanning tunneling microscopy-induced luminescence (TR-STML) stimulated with nanosecond voltage pulses. We use isolated defects in C thin films as a model system into which we inject single charges and investigate the formation dynamics of a single exciton. Tunable hole and electron injection rates are obtained from a kinetic model that reproduces the measured electroluminescent transients. These findings demonstrate that TR-STML can track dynamics at the quantum limit of single charge injection and can be extended to other systems and materials important for nanophotonic devices.

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“…An isolated atom provides a particularly well defined quantum system [10,11], but the need for ultra-high vacuum and some sort of trap makes this difficult to scale up in practical devices. Consequently, there is great interest in solid-state alternatives [12] such as quantum dots [13][14][15][16], defects in diamond [17,18], impurities in other solids [19], and our system of choice-single organic molecules [20][21][22]. If the photons are required to interfere with each other, they should be identical and then the source needs to be cooled to very low temperature to suppress spectral broadening due to thermal phonons.…”

Section: Introductionmentioning

confidence: 99%

Efficient excitation of dye molecules for single photon generation

et al. 2018

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A reliable single photon source is required for many aspects of quantum technology. Organic molecules are attractive for this application because they can have high quantum yield and can be photostable, even at room temperature. To generate a photon with high probability, a laser must excite the molecule efficiently. We develop a simple model for that efficiency and discuss how to optimise it. We demonstrate the validity of our model through experiments on a single dibenzoterrylene (DBT) molecule in an anthracene crystal. We show that the excitation probability cannot exceed 75% at room temperature, but can increase to over 99% if the sample is cooled to liquid nitrogen temperature. The possibility of high photon generation efficiency with only modest cooling is a significant step towards a reliable photon source that is simple and practical.

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Electrically driven single-photon emission from an isolated single molecule

Cited by 115 publications

References 49 publications

Local Probes of Graphene Lattice Dynamics

Local Probes of Graphene Lattice Dynamics

Single Charge and Exciton Dynamics Probed by Molecular-Scale-Induced Electroluminescence

Efficient excitation of dye molecules for single photon generation

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