A Waveguide-Coupled On-Chip Single-Photon Source

Laucht, Arne; Pütz, Simon; Günthner, T.; Hauke, N.; Saive, Rebecca; Frédérick, Simon; Bichler, Max; Amann, Markus‐Christian; Holleitner, Alexander W.; Kaniber, M.; Finley, Jonathan J.

doi:10.1103/physrevx.2.011014

Cited by 160 publications

(185 citation statements)

References 40 publications

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“…The use of III-V materials, especially GaAs and InP compounds, is very promising for QPIC [3] because it allows the integration of on-demand single-photon sources. Semiconductor quantum dots (QDs) have been shown to be nearly ideal sources of non-classical light [4] that can be efficiently routed into nanophotonic circuits [5][6][7][8]. As compared to integrated single-photon sources based on parametric processes in LiNbO 3 [9] or Si waveguides [10], QDs offer the advantage of much higher efficiency and easier filtering of the pump beam.…”

Section: Introductionmentioning

confidence: 99%

Integration of Single-Photon Sources and Detectors on GaAs

Digeronimo¹,

Petruzzella²,

Birindelli³

et al. 2016

Photonics

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Quantum photonic integrated circuits (QPICs) on a GaAs platform allow the generation, manipulation, routing, and detection of non-classical states of light, which could pave the way for quantum information processing based on photons. In this article, the prototype of a multi-functional QPIC is presented together with our recent achievements in terms of nanofabrication and integration of each component of the circuit. Photons are generated by excited InAs quantum dots (QDs) and routed through ridge waveguides towards photonic crystal cavities acting as filters. The filters with a transmission of 20% and free spectral range ≥66 nm are able to select a single excitonic line out of the complex emission spectra of the QDs. The QD luminescence can be measured by on-chip superconducting single photon detectors made of niobium nitride (NbN) nanowires patterned on top of a suspended nanobeam, reaching a device quantum efficiency up to 28%. Moreover, two electrically independent detectors are integrated on top of the same nanobeam, resulting in a very compact autocorrelator for on-chip g (2) (τ) measurements.

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Section: Introductionmentioning

confidence: 99%

Integration of Single-Photon Sources and Detectors on GaAs

Digeronimo¹,

Petruzzella²,

Birindelli³

et al. 2016

Photonics

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show abstract

“…Recent studies have reported the integration of QDs in photonic circuits, in particular photonic crystal waveguides, [16][17][18][19][20][21] which extended the use of these emitters as integrated in-plane quantum light sources.…”

mentioning

confidence: 99%

In-plane emission of indistinguishable photons generated by an integrated quantum emitter

Kalliakos

Brody

Schwagmann

et al. 2014

Applied Physics Letters

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We demonstrate the emission of indistinguishable photons along a semiconductor chip originating from carrier recombination in an InAs quantum dot. The emitter is integrated in the waveguiding region of a photonic crystal structure, allowing for onchip light propagation. We perform a Hong-Ou-Mandel-type of experiment with photons collected from the exit of the waveguide and we observe two-photon interference under continuous wave excitation. Our results pave the way for the integration of quantum emitters in advanced photonic quantum circuits.

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“…However, in the emerging field of photonic quantum information technology, it is highly desirable for the integrated quantum emitter to be able to emit highly indistinguishable photons into an on-chip quantum circuit. The integration of QDs in photonic circuits, in particular photonic crystal waveguides (PCWGs), [21][22][23][24][25][26][27] has extended the use of these emitters as integrated in-plane quantum light sources. These systems offer broadband operation, 20 efficiency 23,28 and scalability.…”

mentioning

confidence: 99%

Enhanced indistinguishability of in-plane single photons by resonance fluorescence on an integrated quantum dot

Kalliakos

Brody

Bennett

et al. 2016

Applied Physics Letters

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Integrated quantum light sources in photonic circuits are envisaged as building blocks of future on-chip architectures for quantum logic operations. While semiconductor quantum dots have been proven to be highly efficient emitters of quantum light, their interaction with the host material induces spectral decoherence, which decreases the indistinguishability of the emitted photons and limits their functionality. Here, we show that the indistinguishability of in-plane photons can be greatly enhanced by performing resonance fluorescence on a quantum dot coupled to a photonic crystal waveguide. We find that the resonant optical excitation of an exciton state induces an increase of the emitted single-photon coherence by a factor of 15. Twophoton interference experiments reveal a visibility of 0.80 ± 0.03, which is good agreement with

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A Waveguide-Coupled On-Chip Single-Photon Source

Cited by 160 publications

References 40 publications

Integration of Single-Photon Sources and Detectors on GaAs

Integration of Single-Photon Sources and Detectors on GaAs

In-plane emission of indistinguishable photons generated by an integrated quantum emitter

Enhanced indistinguishability of in-plane single photons by resonance fluorescence on an integrated quantum dot

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