Directional Emission of a Deterministically Fabricated Quantum Dot–Bragg Reflection Multimode Waveguide System

Mrowiński, P.; Schnauber, Peter; Gutsche, Philipp; Kaganskiy, Arsenty; Schall, Johannes; Burger, Sven; Rodt, Sven; Reitzenstein, Stephan

doi:10.1021/acsphotonics.9b00369

Cited by 25 publications

(33 citation statements)

References 38 publications

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“…A promising approach is to exploit chiral quantum optics to form a chiral interface that facilitates the unidirectional transfer of the spin to the guided photons. [27] To date, chiral coupling has been intensively evaluated in various nanophotonic structures including metal surfaces, [28,29] optical fibers, [30,31] semiconductor waveguides, [32][33][34][35] microresonators, [36][37][38][39][40][41][42][43] and topological nanostructures. [44,45] Particularly, the tightly confined light field carries transverse spin angular momentum; thus, a link between the spin and propagation direction of light can be introduced.…”

Section: Introductionmentioning

confidence: 99%

“…To date, chiral coupling has been intensively evaluated in various nanophotonic structures including metal surfaces, [ 28,29 ] optical fibers, [ 30,31 ] semiconductor waveguides, [ 32–35 ] microresonators, [ 36–43 ] and topological nanostructures. [ 44,45 ] Particularly, the tightly confined light field carries transverse spin angular momentum; thus, a link between the spin and propagation direction of light can be introduced.…”

Section: Introductionmentioning

confidence: 99%

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Chiral Photonic Circuits for Deterministic Spin Transfer

Xiao

Xie

et al. 2021

Laser & Photonics Reviews

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Chiral quantum optics has attracted considerable interest in the field of quantum information science. Exploiting the spin-polarization properties of quantum emitters and engineering rational photonic nanostructures has made it possible to transform information from spin to path encoding. Here, compact chiral photonic circuits with deterministic circularly polarized chiral routing and beamsplitting are demonstrated using two laterally adjacent waveguides coupled with quantum dots. Chiral routing arises from the electromagnetic field chirality in waveguide, and beamsplitting is obtained via the evanescent field coupling. The spin-and position-dependent directional spontaneous emission are achieved by spatially selective micro-photoluminescence measurements, with a chiral contrast of up to 0.84 in the chiral photonic circuits. This makes a significant advancement for broadening the application scenarios of chiral quantum optics and developing scalable quantum photonic networks.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chiral Photonic Circuits for Deterministic Spin Transfer

Xiao

Xie

et al. 2021

Laser & Photonics Reviews

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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

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“…If a quantum emitter is then placed at the so‐called C ‐point and a strong magnetic field is applied in the growth direction of the QD, the two circularly polarized exciton transitions lead to a unidirectional photon emission depending on the helicity as seen in Figure . This behavior was also demonstrated for QDs in nanobeam waveguides as well as for ridge waveguides . For a more general overview on chiral quantum optics see ref.…”

Section: Gaas‐based Photonic Integrated Circuitsmentioning

confidence: 80%

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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Directional Emission of a Deterministically Fabricated Quantum Dot–Bragg Reflection Multimode Waveguide System

Cited by 25 publications

References 38 publications

Chiral Photonic Circuits for Deterministic Spin Transfer

Chiral Photonic Circuits for Deterministic Spin Transfer

Chiral topological photonics with an embedded quantum emitter

Semiconductor Quantum Dots for Integrated Quantum Photonics

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