Path-dependent initialization of a single quantum dot exciton spin in a nanophotonic waveguide

Coles, R. J.; Price, D. M.; Royall, B.; Clarke, Edmund M.; Skolnick, M. S.; Fox, A. M.; Makhonin, M. N.

doi:10.1103/physrevb.95.121401

Cited by 23 publications

(23 citation statements)

References 36 publications

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“…Chiral light-matter interactions are directional, enabling non-reciprocal devices and circuits, including unidirectional single photon emission. This directionality arises from the interaction of elliptical dipoles with finely structured light fields of nanophotonic systems such as plasmonic surfaces [39,64], nanowaveguides [16,56], resonators [48,72] and photonic-crystal waveguides (PhCWs) [37,79,88] using either classical or quantum light sources [41]. Chiral light-matter interactions enable non-reciprocal devices such as optical isolators [79], circulators [69,70,84] and quantum gates [55,76] and, in waveguides, are the basis for several protocols for quantum networks [44].…”

Section: Introductionmentioning

confidence: 99%

Chiral quantum optics in broken-symmetry and topological photonic crystal waveguides

Nils¹,

Hughes²,

Jeannic³

et al. 2021

Preprint

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On-chip chiral quantum light-matter interfaces, which support directional interactions, provide a promising platform for efficient spin-photon coupling, non-reciprocal photonic elements, and quantum logic architectures. We present full-wave three-dimensional calculations to quantify the performance of conventional and topological photonic crystal waveguides as chiral emitter-photon interfaces. Specifically, the ability of these structures to support and enhance directional interactions while suppressing subsequent backscattering losses is quantified. Broken symmetry waveguides, such as the non-topological glide-plane waveguide and topological bearded interface waveguide are found to act as efficient chiral interfaces, with the topological waveguide modes allowing for operation at significantly higher Purcell enhancement factors. Finally, although all structures suffer from backscattering losses due to fabrication imperfections, these are found to be smaller at high enhancement factors for the topological waveguide. These reduced losses occur because the optical mode is pushed away from the air-dielectric interfaces where scattering occurs, and not because of any topological protection. These results are important to the understanding of light-matter interactions in topological photonic crystal and to the design of efficient, on-chip chiral quantum devices.

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Section: Introductionmentioning

confidence: 99%

Chiral quantum optics in broken-symmetry and topological photonic crystal waveguides

Nils¹,

Hughes²,

Jeannic³

et al. 2021

Preprint

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“…First demonstrated by coupling a semiconductor quantum dot (QD) to a dielectric nanobeam waveguide [8,9], the chiral quantum optical interface was subsequently extended to atomic [10][11][12] and nano-particle [13] quantum emitters. More recent developments, however, have returned to the on-chip nano-photonic platform, using single QDs coupled to dielectric waveguides [14][15][16][17][18]. A particular strength of such an approach lies in harnessing the tightly-confined optical waveguide modes common to the nano-photonic platform.…”

Section: Introductionmentioning

confidence: 99%

Chiral topological photonics with an embedded quantum emitter

Mehrabad¹,

Foster²,

Dost³

et al. 2020

Optica

101

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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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Path-dependent initialization of a single quantum dot exciton spin in a nanophotonic waveguide

Cited by 23 publications

References 36 publications

Chiral quantum optics in broken-symmetry and topological photonic crystal waveguides

Chiral quantum optics in broken-symmetry and topological photonic crystal waveguides

Chiral topological photonics with an embedded quantum emitter

Semiconductor Quantum Dots for Integrated Quantum Photonics

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