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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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Photon pair generation and manipulation in an integrated silicon chip

Bonneau, D. (author), Silverstone, J.W. (author), Hadfield, R.H. (author), Zwiller, V. (author), Ohira, K. (author), Suzuki, N. (author), Yoshida, H. (author), Iizuka, N. (author), Ezaki, M. (author), Rarity, J.G. (author), O'Brien, J.L. (author), Thompson, M.G. (author)

Quantum photonics is a promising technology for implementing quantum information tasks. We demonstrate integration of multiple photon pair sources together with a circuit enabling creation and manipulation of photon pairs in a monolithic silicon-on-insulator chip.

conference paper 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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Optical polarization properties of a nanowire quantum dot probed along perpendicular orientations

Bugarini, G. (author), Reimer, M.E. (author), Zwiller, V. (author)

We report on the optical properties of single quantum dots in nanowires probed along orthogonal directions. We address the same quantum dot from either the nanowire side or along the nanowire axis via reflection on a micro-prism. The collected photoluminescence intensity from nanowires lying on a substrate is improved 3-fold using the prism as...

journal article 2012

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Superconducting detector dynamics studied by quantum pump-probe spectroscopy

Heeres, R.W. (author), Zwiller, V. (author)

We explore the dynamics of superconducting single-photon detectors (SSPDs) on the picosecond time-scale using a correlated photon-pair source based on spontaneous parametric downconversion (SPDC), corresponding to a pump-probe experiment at the single-photon level. We show that the detector can operate in a regime where the two-photon detection...

journal article 2012

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Efficient single particle detection with a superconducting nanowire

Azzouz, H. (author), Dorenbos, S.N. (author), De Vries, D. (author), Bermudez Urena, E. (author), Zwiller, V. (author)

Detection of ?- and ?-particles is of paramount importance in a wide range of applications. Current particle detectors are all macroscopic and have limited time resolution. We demonstrate a nanoscale particle detector with a small detection volume, high detection efficiency, short dead times and low dark count levels. We measure ?- and ?...

journal article 2012

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Quantum interference and manipulation of entanglement in silicon wire waveguide quantum circuits

Bonneau, D. (author), Engin, E. (author), Dorenbos, S.N. (author), Zwiller, V. (author)

Integrated quantum photonic waveguide circuits are a promising approach to realizing future photonic quantum technologies. Here, we present an integrated photonic quantum technology platform utilizing the silicon-oninsulator material system, where quantum interference and the manipulation of quantum states of light are demonstrated in components...

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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Read-out of superconducting single photon detectors

Dorenbos, S.N. (author), Zwiller, V.G. (author), Schouten, R.N. (author)

Detection arrangement having an array of at least one superconducting single photon detector (SSPD). The detection arrangement further has a cryogenic part (9) with the array of at least one SSPD (1), the cryogenic part (9) being at a superconducting temperature in operation. Also, a separate charge storage element (5) in the form of an...

patent 2011