Single-photon electroluminescence for on-chip quantum networks

Bentham, C.; Hallett, D.; Prtljaga, N.; Royall, B.; Vaitiekus, D.; Coles, R. J.; Clarke, Edmund M.; Fox, A. M.; Skolnick, M. S.; Itskevich, I. E.; Wilson, L. R.

doi:10.1063/1.4965295

Cited by 10 publications

(11 citation statements)

References 28 publications

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“…As shown in ( 4)-( 11), the QD density increases gradually from center to the edge within the radius of 2 cm, but increase more rapidly from 2 cm to the edge. Other crystallographic directions including [1][2][3][4][5][6][7][8][9][10], diagonal 1, diagonal 2 demonstrate the same regularity as well, as shown in Figure 2c. These results indicate that there is a temperature distribution over the threeinch wafer.…”

Section: Resultssupporting

confidence: 57%

“…Semiconductor quantum dots (QDs), due to its discrete energy levels as artificial atoms, serve as a core element in the emerging application of optoelectronic devices including lasers [ 1 ], solar cells [ 2 ], and photodetectors [ 3 ]. The rapid development of quantum computing [ 4 ], quantum cryptography [ 5 ], as well as quantum key distribution (QKD) [ 6 ] in recent years, busting many researches in low-density quantum dots for the generation of ideal single-photons and entangled-photon pairs via external optical/electrical pulses [ 7 , 8 ]. Last three decades have witnessed the rapid development of QDs from concept to reality via advanced molecular beam epitaxial technique, including Stranski–Krastanow (S–K) mode growth [ 9 ], droplet epitaxy [ 8 , 10 ], as well as site-controlled growth [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Wafer-Scale Epitaxial Low Density InAs/GaAs Quantum Dot for Single Photon Emitter in Three-Inch Substrate

Huang

Yang

et al. 2021

Nanomaterials

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In this work, we successfully achieved wafer-scale low density InAs/GaAs quantum dots (QDs) for single photon emitter on three-inch wafer by precisely controlling the growth parameters. The highly uniform InAs/GaAs QDs show low density of μ0.96/μm2 within the radius of 2 cm. When embedding into a circular Bragg grating cavity on highly efficient broadband reflector (CBR-HBR), the single QDs show excellent optoelectronic properties with the linewidth of 3± 0.08 GHz, the second-order correlation factor g2(τ)=0.0322 ±0.0023, and an exciton life time of 323 ps under two-photon resonant excitation.

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Section: Resultssupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Wafer-Scale Epitaxial Low Density InAs/GaAs Quantum Dot for Single Photon Emitter in Three-Inch Substrate

Huang

Yang

et al. 2021

Nanomaterials

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“…This work demonstrates that the electrical approach to QD energy tuning (required to overcome spectral mismatch between QDs) is fully compatible with the realisation of a single photon nonlinearity in a waveguide-coupled geometry. Electrical tuning is a local approach 36 and will allow for individual electrical control of separate QDs coupled to the same waveguide mode.…”

Section: Transmission Photon Statistics and Optical Nonlinearitymentioning

confidence: 99%

Electrical control of nonlinear quantum optics in a nano-photonic waveguide

Hallett¹,

Foster²,

Hurst³

et al. 2018

Optica

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Corresponding author: A. P. Foster: andrew.foster@sheffield.ac.uk † These authors contributed equally to this work. Local control of the generation and interaction of indistinguishable single photons is a key requirement for photonic quantum networks. Waveguide-based architectures, in which embedded quantum emitters act as both highly coherent single photon sources and as nonlinear elements to mediate photon-photon interactions, offer a scalable route to such networks. However, local electrical control of a quantum optical nonlinearity has yet to be demonstrated in a waveguide geometry. Here, we demonstrate local electrical tuning and switching of single photon generation and nonlinear interaction by embedding a quantum dot in a nano-photonic waveguide with enhanced light-matter interaction. A power-dependent transmission extinction as large as 40±2% and clear, voltage-controlled bunching in the photon statistics of the transmitted light demonstrate the single photon character of the nonlinearity. The deterministic nature of the nonlinearity is particularly attractive for the future realization of photonic gates for scalable nano-photonic waveguide-based quantum information processing.

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“…Despite the fragility, a single‐photon purity larger than 99.4% and a photon indistinguishability of up to 94% was measured for a quasiresonantly excited QD embedded within a p‐i‐n waveguide structure allowing not only for stabilization of the emitters environment but also making the emission tuning via the quantum confined Stark effect possible . Further works show the coherent photon generation via resonant pumping schemes as well as single‐photon electroluminescence for nanobeam‐integrated quantum emitters . Beneficial is also the direct integration of 1D photonic crystal mirrors and cavities within the waveguide structure via the etching of air holes.…”

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 99%

Semiconductor Quantum Dots for Integrated Quantum Photonics

et al. 2019

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Quantum mechanics promises to have a strong impact on many aspects of research and technology, improving classical analogues via purely quantum effects. A large variety of tasks are currently under investigation, for example, the implementation of quantum computing, sensing, metrology, and communication. From a general perspective, in a similar way as classical computing benefited by the reduction of the device footprint, enabling the realization of highly complex chips, a range of quantum applications will sensibly improve thanks to the successful realization of on-chip quantum photonics. Conversely to bulky table-top experiments, it would be very advantageous to transfer all required functionalities on the same quantum photonic chip. The key elements for quantum photonic circuits are on-demand nonclassical light sources, a versatile photonic logic, the ability to store quantum information, and highly efficient detectors, directly integrated on-chip. Among several systems capable of the efficient generation of singleand indistinguishable photons, quantum dots are rapidly establishing as one of the most appealing candidates. This paper reviews the recent progress in the on-chip integration of quantum-dot-based nonclassical light sources as well as in the development of the main building blocks, either integrated monolithically or hybridly on a compact and scalable platform. IntroductionFrom the foundation of quantum mechanics in the early 20th century to explain fundamental physical observations, over the development of transistors and lasers in the 1950s and 1960s, the second quantum revolution is now in full swing. The driving force behind this continuing "quantum footrace" are quantum mechanical effects based on superposition and entanglement that can lead to profound changes. Especially in the field of quantum information science, dramatic improvements are expected in terms of increased computational speed and communication security if compared with classical counterparts.Talking about quantum supremacy, two problems-Grover's algorithm for the efficient search in large unsorted databases and Shor's algorithm for the prime factorization of large integers-are frequently mentioned. [1][2][3] Grover's quantum search algorithm can find an element of a search space M in O( √ M) operations compared to the best known classical algorithms approximately requiring O(M) steps. [4] Shor's algorithm can prime factorize large integers with N bits in polynomial speed compared to the exponential scaling of classical algorithms. Currently, several cryptography schemes in electronic communication systems rely on the difficulty of prime factorization as its security method. Consequently, a quantum computer could break the cryptographic keys quickly by calculating or searching exhaustively all key possibilities, which may allow an eavesdropper to intercept the communication channel. [5] However, quantum key distribution schemes can be alternatively used, which are based on the secure exchange of a cryptographic key between remote...

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Single-photon electroluminescence for on-chip quantum networks

Cited by 10 publications

References 28 publications

Wafer-Scale Epitaxial Low Density InAs/GaAs Quantum Dot for Single Photon Emitter in Three-Inch Substrate

Wafer-Scale Epitaxial Low Density InAs/GaAs Quantum Dot for Single Photon Emitter in Three-Inch Substrate

Electrical control of nonlinear quantum optics in a nano-photonic waveguide

Semiconductor Quantum Dots for Integrated Quantum Photonics

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