Plug‐and‐Play Single‐Photon Devices with Efficient Fiber‐Quantum Dot Interface

Jeon, Woong Bae; Moon, Jong Sung; Kim, Kyuyoung; Ko, Young‐Ho; Richardson, Christopher J. K.; Waks, Edo; Kim, Je‐Hyung

doi:10.1002/qute.202200022

Cited by 29 publications

(18 citation statements)

References 55 publications

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“…For photon sources based on the vertical Fabry–Pérot-cavity approach that emits photons out-of-plane, the implementation of cavity-to-fiber coupling requires tailoring the emission NA to fit that of the fiber for high-efficiency collection. For example, specifically designed surface nanostructures can efficiently converge the emitted beams [367,368] . Alternatively, an engineered fiber tip might be incorporated directly as the top mirror for the open-cavity-type source [21] .…”

Section: Challenges and Outlookmentioning

confidence: 99%

See 1 more Smart Citation

Epitaxial quantum dots: a semiconductor launchpad for photonic quantum technologies

2022

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Epitaxial quantum dots formed by III-V compound semiconductors are excellent sources of nonclassical photons, creating single photons and entangled multi-photon states on demand. Their semiconductor nature allows for a straightforward combination with mature integrated photonic technologies, leading to novel functional devices at the single-photon level. Integrating a quantum dot into a carefully engineered photonic cavity enables control of the radiative decay rate using the Purcell effect and the realization of photon-photon nonlinear gates. In this review, we introduce the basis of epitaxial quantum dots and discuss their applications as non-classical light sources. We highlight two interfaces-one between flying photons and the quantum-dot dipole, and the other between the photons and the spin. We summarize the recent development of integrated photonics and reconfigurable devices that have been combined with quantum dots or are suitable for hybrid integration. Finally, we provide an outlook of employing quantum-dot platforms for practical applications in large-scale quantum computation and the quantum Internet.

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Section: Challenges and Outlookmentioning

confidence: 99%

“…Alternatively, an engineered fiber tip might be incorporated directly as the top mirror for the open-cavity-type source [21] . The end goal is a “plug-and-play” source chip with both excitation and collection paths efficiently and reliably packaged with standard optical fibers [368,369] .…”

Section: Challenges and Outlookmentioning

confidence: 99%

Epitaxial quantum dots: a semiconductor launchpad for photonic quantum technologies

2022

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“…However, the controlled fiber coupling of individual photonic structures is the goal, and has already been reported for micromesas [127], nanowires [160], and micropillars [130,131]. We refrain from a detailed analysis here and refer to the already mentioned tables at the end of the article, as we would like to highlight three publications that show the state-of-the-art [85,150,161].…”

Section: Near-field Coupling Of Solid-state Emitters To Cleaved Fibersmentioning

confidence: 99%

“…The third example used a hole-based circular diffraction cavity containing InAs QDs, designed for very narrow-angled radiation [161]. This is of significant advantage for coupling systems in the near field, as it addresses the typically very small NA of SMFs.…”

Section: Near-field Coupling Of Solid-state Emitters To Cleaved Fibersmentioning

confidence: 99%

Fiber-coupled quantum light sources based on solid-state quantum emitters

Bremer

Rodt

Reitzenstein

2022

Mater. Quantum. Technol.

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Photonic quantum technology is essentially based on the exchange of individual photons as information carriers. Therefore, the development of practical single-photon sources that emit single photons on-demand is a crucial contribution to advance this emerging technology and to promoting its first real-world applications. In the last two decades, a large number of quantum light sources based on solid state emitters have been developed on a laboratory scale. Corresponding structures today have almost ideal optical and quantum-optical properties. For practical applications, however, one crucial factor is usually missing, namely direct on-chip fiber coupling, which is essential, for example, for the direct integration of such quantum devices into fiber-based quantum networks. In fact, the development of fiber-coupled quantum light sources is still in its infancy, with very promising advances having been made in recent years. Against this background, this review article presents the current status of the de-velopment of fiber-coupled quantum light sources based on solid state quantum emitters and discusses challenges, technological solutions and future prospects. Among other things, the numerical optimiza-tion of the fiber coupling efficiency, coupling methods, and important realizations of such quantum devices are presented and compared. Overall, this article provides an important overview of the state of the art and the performance parameters of fiber-coupled quantum light sources that have been achieved so far. It is aimed equally at experts in the scientific field and at students and newcomers who want to get an overview of the current developments.

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“…Therefore, the practical, efficient implementation of fiber-integrated quantum emitters still remains a demanding experimental goal. In this paper, we demonstrate efficient plug-and-play single-photon sources based on telecom-emitting QDs with optimal fiber interfacing photonic structures [17]. Newly designed diffraction optics of hole-circular Bragg gratings (H-CBG) realize narrow vertical beaming with Gaussian far-field profile.…”

Section: Introductionmentioning

confidence: 99%

Fiber-integrated single-photon device with an efficient fiber-quantum dot interface

Jeon,

Moon,

et al. 2023

Quantum Nanophotonic Materials, Devices, and Systems 2023

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Recent advances in solid-state quantum emitters have led to the realization of quantum communication, quantum teleportation, and quantum simulations. However, to implement such quantum technologies in a practical way, it is essential to interface quantum emitters with low-loss optical platforms, such as fiber optics. So far, there have been several different approaches for coupling single-photon emissions from quantum dots into fiber optics. In particular, integrating quantum dots into nanophotonic structures can significantly enhance light extraction and produce Gaussian like far-field patterns. However, a small numerical aperture of fiber still limits single-photon coupling efficiency. Alternatively, adiabatic coupling between tapered single-photon devices and fibers can provide near-unit coupling efficiency, while the delicate tapered structures cause long-term stability problems. Therefore, none of the previous approaches have realized an efficient and reliable implementation of fiber-integrated quantum emitters. In this study, we demonstrate efficient and compact plug-and-play single-photon sources based on hole-based circular Bragg gratings. A thin-membrane planar resonator with hole gratings produces an ultra-narrow vertical beam whose emission angle matches the small numerical aperture of a single-mode fiber. Using a pick-and-place technique, the fabricated single photon devices can be precisely integrated into the core of a single-mode fiber. The integrated fiber–QD system enables the compact plug-and-play operation of single photons from a source to a detector with high coupling efficiency and long-term stability.

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Plug‐and‐Play Single‐Photon Devices with Efficient Fiber‐Quantum Dot Interface

Cited by 29 publications

References 55 publications

Epitaxial quantum dots: a semiconductor launchpad for photonic quantum technologies

Epitaxial quantum dots: a semiconductor launchpad for photonic quantum technologies

Fiber-coupled quantum light sources based on solid-state quantum emitters

Fiber-integrated single-photon device with an efficient fiber-quantum dot interface

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