Monolithic on-chip integration of semiconductor waveguides, beamsplitters and single-photon sources

Jöns, Klaus D.; Rengstl, Ulrich; Oster, M.; Hargart, F.; Heldmaier, Matthias; Bounouar, S.; Ulrich, S.; Jetter, Michael; Michler, Peter

doi:10.1088/0022-3727/48/8/085101

Cited by 49 publications

(51 citation statements)

References 41 publications

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“…15,16 It has been demonstrated that very high coupling efficiencies of quantum emitters into photonic crystals (PCs) are possible 17,18 and a high coupling to ridge WGs can also be expected. 19 Together with the implementation of beamsplitters (BSs) 20,21 or single-photon detectors, 22,23 several building blocks for on-chip LOQC have been realized. For the LOQC scheme, it is furthermore necessary to achieve a two-photon quantum interference with indistinguishable photons.…”

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confidence: 99%

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On-chip beamsplitter operation on single photons from quasi-resonantly excited quantum dots embedded in GaAs rib waveguides

Rengstl

Schwartz

Herzog

et al. 2015

Applied Physics Letters

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We present an on-chip beamsplitter operating on a single-photon level by means of a quasi-resonantly driven InGaAs/GaAs quantum dot. The single photons are guided by rib waveguides and split into two arms by an evanescent field coupler. Although the waveguides themselves support the fundamental TE and TM modes, the measured degree of polarization (∼90%) reveals the main excitation and propagation of the TE mode. We observe the preserved single-photon nature of a quasi-resonantly excited quantum dot by performing a cross-correlation measurement on the two output arms of the beamsplitter. Additionally, the same quantum dot is investigated under resonant excitation, where the same splitting ratio is observed. An autocorrelation measurement with an off-chip beamsplitter on a single output arm reveal the single-photon nature after evanescent coupling inside the on-chip splitter. Due to their robustness, adjustable splitting ratio, and their easy implementation, rib waveguide beamsplitters with embedded quantum dots provide a promising step towards fully integrated quantum circuits.

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confidence: 99%

“…A more detailed description of the measurement method can be found in Ref. 21. The overall propagation length of the photons between the excitation and the out-coupling is approximately 430-450 lm.…”

mentioning

confidence: 99%

On-chip beamsplitter operation on single photons from quasi-resonantly excited quantum dots embedded in GaAs rib waveguides

Rengstl

Schwartz

Herzog

et al. 2015

Applied Physics Letters

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“…For these reasons, sources producing different quantum states while maintaining a high degree of compactness and integratability are highly desirable. GaAs and its material derivatives like AlGaAs present a strong case for the miniaturization of different quantum components in the same chip [21]. Its direct bandgap has already led to the monolithic integration of the primary laser source and the nonlinear medium into a single device emitting photon pairs under electrical injection at room temperature [22].…”

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confidence: 99%

Integrated AlGaAs source of highly indistinguishable and energy-time entangled photons

Autebert¹,

Bruno²,

Martin³

et al. 2016

Optica

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The generation of nonclassical states of light in miniature chips is a crucial step toward practical implementations of future quantum technologies. Semiconductor materials are ideal for achieving extremely compact and massively parallel systems and several platforms are currently under development. In this context, spontaneous parametric downconversion in AlGaAs devices combines the advantages of room temperature operation, possibility of electrical injection, and emission in the telecom band. Here we report on a chip-based AlGaAs source, producing indistinguishable and energy-time entangled photons with a brightness of 7.2×106 pairs/s and a signal-to-noise ratio of 141±12. Indistinguishability between the photons is demonstrated via a Hong–Ou–Mandel experiment with a visibility of 89±3%, mainly limited by the reflectivity of the chip facets, while energy-time entanglement is tested via a Franson interferometer leading to a visibility of 96±4

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“…To fully exploit the advantages of integrated photonics, it would be ideal to integrate these different components on a single substrate. Motivated by this, many researchers have recently demonstrated the hybrid integration of different quantum-optical components [103][104][105][106][107][108][109]. Hence, the stage of integrated quantum photonics research is now moving to hybrid integration on a chip.…”

Section: On-chip Quantum Buffermentioning

confidence: 99%

Generation and manipulation of entangled photons on silicon chips

Matsuda

Takesue²

2016

Nanophotonics

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Integrated quantum photonics is now seen as one of the promising approaches to realize scalable quantum information systems. With optical waveguides based on silicon photonics technologies, we can realize quantum optical circuits with a higher degree of integration than with silica waveguides. In addition, thanks to the large nonlinearity observed in silicon nanophotonic waveguides, we can implement active components such as entangled photon sources on a chip. In this paper, we report recent progress in integrated quantum photonic circuits based on silicon photonics. We review our work on correlated and entangled photon-pair sources on silicon chips, using nanoscale silicon waveguides and silicon photonic crystal waveguides. We also describe an on-chip quantum buffer realized using the slow-light effect in a silicon photonic crystal waveguide. As an approach to combine the merits of different waveguide platforms, a hybrid quantum circuit that integrates a silicon-based photon-pair source and a silica-based arrayed waveguide grating is also presented.

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Monolithic on-chip integration of semiconductor waveguides, beamsplitters and single-photon sources

Cited by 49 publications

References 41 publications

On-chip beamsplitter operation on single photons from quasi-resonantly excited quantum dots embedded in GaAs rib waveguides

On-chip beamsplitter operation on single photons from quasi-resonantly excited quantum dots embedded in GaAs rib waveguides

Integrated AlGaAs source of highly indistinguishable and energy-time entangled photons

Generation and manipulation of entangled photons on silicon chips

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