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Bright nanoscale source of deterministic entangled photon pairs violating Bell's inequality

Jöns, K.D. (author), Schweickert, L.S. (author), Versteegh, M.A.M. (author), Dalacu, Dan (author), Poole, Philip J. (author), Gulinatti, Angelo (author), Giudice, Andrea (author), Zwiller, V.G. (author), Reimer, M.E. (author)

Global, secure quantum channels will require efficient distribution of entangled photons. Long distance, low-loss interconnects can only be realized using photons as quantum information carriers. However, a quantum light source combining both high qubit fidelity and on-demand bright emission has proven elusive. Here, we show a bright photonic...

journal article 2017

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Observation of strongly entangled photon pairs from a nanowire quantum dot

Versteegh, M.A. (author), Reimer, M.E. (author), Jöns, K.D. (author), Dalacu, D. (author), Poole, P.J. (author), Gulinatti, A. (author), Giudice, A. (author), Zwiller, V. (author)

A bright photon source that combines high-fidelity entanglement, on-demand generation, high extraction efficiency, directional and coherent emission, as well as position control at the nanoscale is required for implementing ambitious schemes in quantum information processing, such as that of a quantum repeater. Still, all of these properties...

journal article 2014

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Photon pair generation in a silicon micro-ring resonator with reverse bias enhancement

Engin, E. (author), Bonneau, D. (author), Natarajan, C.M. (author), Clark, A.S. (author), Tanner, M.G. (author), Hadfield, R.H. (author), Dorenbos, S.N. (author), Zwiller, V.G. (author), Ohira, K. (author), Suzuki, N. (author), Yoshida, H. (author), Iizuka, N. (author), Ezaki, M. (author), O’Brien, J.L. (author), Thompson, M.G. (author)

Photon sources are fundamental components for any quantum photonic technology. The ability to generate high count-rate and low-noise correlated photon pairs via spontaneous parametric down-conversion using bulk crystals has been the cornerstone of modern quantum optics. However, future practical quantum technologies will require a scalable...

journal article 2013

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Single carbon nanotube photovoltaic device

Barkelid, K.M. (author), Zwiller, V.G. (author)

Here we present photocurrent measurements on a single suspended carbon nanotube p-n junction. The p-n junction was induced by electrostatic doping by local gates, and the E11 and E22 resonances in the nanotube could be probed using photocurrent spectroscopy. Current-voltage characteristics were recorded, revealing an enhanced optoelectronic...

journal article 2013

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Capacitive readout and gating of superconducting single photon detectors

Azzouz, H. (author), Heeres, R.W. (author), Dorenbos, S.N. (author), Schouten, R.N. (author), Zwiller, V. (author)

We propose and develop a readout scheme for superconducting single-photon detectors based on an integrated circuit, relaxing the need for large bandwidth amplification and resulting in voltage steps proportional to the number of detected photons. We also demonstrate time gating, to filter scattered light in time and reduce dark counts. This...

journal article 2013

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Kilometer-range, high resolution depth imaging via 1560 nm wavelength single-photon detection

McCarthy, A. (author), Krichel, N.J. (author), Gemmell, N.R. (author), Ren, X. (author), Tanner, M.G. (author), Dorenbos, S.N. (author), Zwiller, V. (author), Hadfield, R.H. (author), Buller, G.S. (author)

This paper highlights a significant advance in time-of-flight depth imaging: by using a scanning transceiver which incorporated a free-running, low noise superconducting nanowire single-photon detector, we were able to obtain centimeter resolution depth images of low-signature objects in daylight at stand-off distances of the order of one...

journal article 2013

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Singlet oxygen luminescence detection with a fiber-coupled superconducting nanowire single-photon detector

Gemmell, N.R. (author), McCarthy, A. (author), Liu, B. (author), Tanner, M.G. (author), Dorenbos, S.N. (author), Zwiller, V. (author), Patterson, M.S. (author), Buller, G.S. (author), Wilson, B.C. (author), Hadfield, R.H. (author)

Direct monitoring of singlet oxygen (1O2) luminescence is a particularly challenging infrared photodetection problem. 1O2, an excited state of the oxygen molecule, is a crucial intermediate in many biological processes. We employ a low noise superconducting nanowire single-photon detector to record 1O2 luminescence at 1270 nm wavelength from a...

journal article 2013

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Quantum detector tomography of a time-multiplexed superconducting nanowire single-photon detector at telecom wavelengths

Natarajan, C.M. (author), Zhang, L. (author), Coldenstrodt-Ronge, H. (author), Donati, G. (author), Dorenbos, S.N. (author), Zwiller, V. (author), Walmsley, I.A. (author), Hadfield, R.H. (author)

Superconducting nanowire single-photon detectors (SNSPDs) are widely used in telecom wavelength optical quantum information science applications. Quantum detector tomography allows the positive-operator-valued measure (POVM) of a single-photon detector to be determined. We use an all-fiber telecom wavelength detector tomography test bed to...

journal article 2013

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Measuring the quantum nature of light with a single source and a single detector

Steudle, G.A. (author), Schietinger, S. (author), Höckel, D. (author), Dorenbos, S.N. (author), Zadeh, I.E. (author), Zwiller, V. (author), Benson, O. (author)

An elementary experiment in optics consists of a light source and a detector. Yet, if the source generates nonclassical correlations such an experiment is capable of unambiguously demonstrating the quantum nature of light. We realized such an experiment with a defect center in diamond and a superconducting detector. Previous experiments relied...

journal article 2012

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Spontaneous emission control of single quantum dots in bottom-up nanowire waveguides

Bulgarini, G. (author), Reimer, M.E. (author), Zehender, T. (author), Hocevar, M. (author), Bakkers, E.P.A.M. (author), Kouwenhoven, L.P. (author), Zwiller, V. (author)

Nanowire waveguides with controlled shape are promising for engineering the collection efficiency of quantum light sources. We investigate the exciton lifetime in individual InAsP quantum dots, perfectly positioned on-axis of InP nanowire waveguides. We demonstrate control over the quantum dot spontaneous emission by varying the nanowire...

journal article 2012

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Longitudinal and transverse exciton-spin relaxation in a single InAsP quantum dot embedded inside a standing InP nanowire using photoluminescence spectroscopy

Sasakura, H. (author), Hermannstädter, C. (author), Dorenbos, S.N. (author), Akopian, N. (author), Van Kouwen, M.P. (author), Motohisa, J. (author), Kobayashi, Y. (author), Kumano, H. (author), Kondo, K. (author), Tomioka, K. (author), Fukui, T. (author), Suemune, I. (author), Zwiller, V. (author)

We have investigated the optical properties of a single InAsP quantum dot embedded in a standing InP nanowire. Elongation of the transverse exciton-spin relaxation time of the exciton state with decreasing excitation power was observed by first-order photon correlation measurements. This behavior is well explained by the motional narrowing...

journal article 2012

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Fast Path and Polarization Manipulation of Telecom Wavelength Single Photons in Lithium Niobate Waveguide Devices

Bonneau, D. (author), Lobino, M. (author), Jiang, P. (author), Natarajan, C.M. (author), Tanner, M.G. (author), Hadfield, R.H. (author), Dorenbos, S.N. (author), Zwiller, V. (author), Thompson, M.G. (author), O'Brien, J.L. (author)

We demonstrate fast polarization and path control of photons at 1550 nm in lithium niobate waveguide devices using the electro-optic effect. We show heralded single photon state engineering, quantum interference, fast state preparation of two entangled photons, and feedback control of quantum interference. These results point the way to a single...

journal article 2012

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Generation of degenerate, factorizable, pulsed squeezed light at telecom wavelengths

Gerrits, T. (author), Stevens, M.J. (author), Baek, B. (author), Calkins, B. (author), Lita, A. (author), Glancy, S. (author), Knill, E. (author), Nam, S.W. (author), Mirin, R.P. (author), Hadfield, R.H. (author), Bennink, R.S. (author), Grice, W.P. (author), Dorenbos, S.N. (author), Zijlstra, T. (author), Klapwijk, T.M. (author), Zwiller, V. (author)

We characterize a periodically poled KTP crystal that produces an entangled, two-mode, squeezed state with orthogonal polarizations, nearly identical, factorizable frequency modes, and few photons in unwanted frequency modes. We focus the pump beam to create a nearly circular joint spectral probability distribution between the two modes. After...

journal article 2011

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Imaging the formation of a p-n junction in a suspended carbon nanotube with scanning photocurrent microscopy

Buchs, G. (author), Barkelid, K.M. (author), Bagiante, S. (author), Steele, G.A. (author), Zwiller, V. (author)

We use scanning photocurrent microscopy (SPCM) to investigate individual suspended semiconducting carbon nanotube devices where the potential profile is engineered by means of local gates. In situ tunable p-n junctions can be generated at any position along the nanotube axis. Combining SPCM with transport measurements allows a detailed...

journal article 2011

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Correlated photon-pair generation in a periodically poled MgO doped stoichiometric lithium tantalate reverse proton exchanged waveguide

Lobino, M. (author), Marshall, G.D. (author), Xiong, C. (author), Clark, A.S. (author), Bonneau, D. (author), Natarajan, C.M. (author), Tanner, M.G. (author), Hadfield, R.H. (author), Dorenbos, S.N. (author), Zijlstra, T. (author), Zwiller, V. (author), Marangoni, M. (author), Ramponi, R. (author), Thompson, M.G. (author), Eggleton, B.J. (author), O'Brien, J.L. (author)

We demonstrate photon-pair generation in a reverse proton exchanged waveguide fabricated on a periodically poled magnesium doped stoichiometric lithium tantalate substrate. Detected pairs are generated via a cascaded second order nonlinear process where a pump laser at wavelength of 1.55 ?m is first doubled in frequency by second harmonic...

journal article 2011

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Erratum: “Generation of correlated photon pairs in a chalcogenide As2S3 waveguide” [ Appl. Phys. Lett. 98, 051101 (2011) ]

Xiong, C. (author), Marshall, G.D. (author), Peruzzo, A. (author), Lobino, M. (author), Clark, A.S. (author), Choi, D.Y. (author), Madden, S.J. (author), Natarajan, C.M. (author), Tanner, M.G. (author), Hadfield, R.H. (author), Dorenbos, S.N. (author), Zijlstra, T. (author), Zwiller, V. (author), Thompson, M.G. (author), Rarity, J.G. (author), Steel, M.J. (author), Luther-Davies, B. (author), Eggleton, B.J. (author), O'Brien, J.L. (author)

journal article 2011

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Generation of correlated photon pairs in a chalcogenide As2S3 waveguide

Xiong, C. (author), Marshall, G.D. (author), Peruzzo, A. (author), Lobino, M. (author), Clark, A.S. (author), Choi, D.Y. (author), Madden, S.J. (author), Natarajan, C.M. (author), Tanner, M.G. (author), Hadfield, R.H. (author), Dorenbos, S.N. (author), Zijlstra, T. (author), Zwiller, V. (author), Thompson, M.G. (author), Rarity, J.G. (author), Steel, M.J. (author), Luther-Davies, B. (author), Eggleton, B.J. (author), O'Brien, J.L. (author)

We demonstrate a 1550 nm correlated photon-pair source in an integrated glass platform—a chalcogenide As2S3 waveguide. A measured pair coincidence rate of 80?s?1 was achieved using 57 mW of continuous-wave pump. The coincidence to accidental ratio was shown to be limited by spontaneous Raman scattering effects that are expected to be mitigated...

journal article 2011

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A high efficiency superconducting nanowire single electron detector

Rosticher, M. (author), Ladan, F.R. (author), Maneval, J.P. (author), Dorenbos, S.N. (author), Zijlstra, T. (author), Klapwijk, T.M. (author), Zwiller, V. (author), Lupa?cu, A. (author), Nogues, G. (author)

We report the detection of single electrons using a Nb0.7Ti0.3N superconducting wire deposited on an oxidized silicon substrate. While it is known that this device is sensitive to single photons, we show that it also detects single electrons with kilo-electron-volt energy emitted from the cathode of a scanning electron microscope with an...

journal article 2010

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Position controlled nanowires for infrared single photon emission

Dorenbos, S.N. (author), Sasakura, H. (author), Van Kouwen, M.P. (author), Akopian, N. (author), Adachi, S. (author), Namekata, N. (author), Jo, M. (author), Motohisa, J. (author), Kobayashi, Y. (author), Tomioka, K. (author), Fukui, T. (author), Inoue, S. (author), Kumano, H. (author), Natarajan, C.M. (author), Hadfield, R.H. (author), Zijlstra, T. (author), Klapwijk, T.M. (author), Zwiller, V. (author), Suemune, I. (author)

We report the experimental demonstration of single-photon and cascaded photon pair emission in the infrared, originating from a single InAsP quantum dot embedded in a standing InP nanowire. A regular array of nanowires is fabricated by epitaxial growth on an electron-beam patterned substrate. Photoluminescence spectra taken on single quantum...

journal article 2010

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Single quantum dot nanowire photodetectors

Van Kouwen, M.P. (author), Van Weert, M.H.M. (author), Reimer, M.E. (author), Akopian, N. (author), Perinetti, U. (author), Algra, R.E. (author), Bakkers, E.P.A.M. (author), Kouwenhoven, L.P. (author), Zwiller, V. (author)

We report InP nanowire photodetectors with a single InAsP quantum dot as light absorbing element. With excitation above the InP band gap, the nanowire photodetectors are efficient (quantum efficiency of 4%). Under resonant excitation of the quantum dot, the photocurrent amplitude depends on the linear polarization direction of the incident light...

journal article 2010