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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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Zhang, Z. (author), Delsing, A.C.A. (author), Notten, P.H.L. (author), Zhao, J. (author), Dorenbos, P. (author), Hintzen, H.T. (author)Mn2+-doped CaAlSiN3 phosphors have been prepared by a solid-state reaction method at high temperature and the solubility of Mn2+ in the host lattice as well as their photoluminescence properties were investigated. In CaAlSiN3, not only Ca2+ sites, but also Al3+ sites can be substituted by Mn2+ ions. CaAlSiN3 : Mn2+ absorbs blue light in the...journal article 2013
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Dorenbos, P. (author)Models and methods to determine the absolute binding energy of 4f-shell electrons in lanthanide dopants will be combined with data on the energy of electron transfer from the valence band to a lanthanide dopant. This work will show that it provides a powerful tool to determine the absolute binding energy of valence band electrons throughout the...journal article 2013
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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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Dorenbos, P. (author)The energy of the 4f-5d transitions of divalent and trivalent lanthanide impurities in compounds depends strongly on the type of lanthanide, its valence, and the type of compound. Despite this large variability there is much systematic in 4f-5d transition energy. Once it is known for one lanthanide that for all others when in the same compound...journal article 2012
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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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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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Dorenbos, P. (author)Lanthanides in compounds can adopt the tetravalent [Xe]4fn?1 (like Ce4+, Pr4+, Tb4+), the trivalent [Xe]4fn (all lanthanides), or the divalent [Xe]4f n+1 configuration (like Eu2+, Yb2+, Sm2+, Tm2+). The 4f-electron binding energy depends on the charge Q of the lanthanide ion and its chemical environment A. Experimental data on three environments...journal article 2012
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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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Thermoluminescence investigation of donor (Ce3+, Pr3+, Tb3+) acceptor (Eu3+, Yb3+) pairs in Y3Al5O12You, F. (author), Bos, A.J.J. (author), Shi, Q. (author), Huang, S. (author), Dorenbos, P. (author)The thermoluminescence properties of Y3Al5O12 (YAG) doped with an electron donor lanthanide (Ce3+, Pr3+, or Tb3+) together with an electron acceptor lanthanide (Yb3+ or Eu3+) were studied with the aim to locate the energy levels of each divalent and each trivalent lanthanide within the band gap. The activation energies needed to liberate...journal article 2012
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Khodyuk, I.V. (author), Rodnyi, P.A. (author), Dorenbos, P. (author)The nonlinear dependence of the relative light output on the energy deposited in single-crystal scintillation materials YAlO3:Ce (YAP:Ce), Y2SiO5:Ce (YSO:Ce), and YPO4:Ce (YPO:Ce) has been studied. The investigations have been conducted under quasi-monochromatic X-ray excitation in the energy range of 9.5–100 keV. In addition to the standard...journal article 2012
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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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Botterman, J. (author), Van den Eeckhout, K. (author), Bos, A.J.J. (author), Dorenbos, P. (author), Smet, P.F. (author)In this work we study the persistent luminescence properties of europium-doped alkaline earth silicon oxynitrides (CaSi2O2N2, SrSi2O2N2 and BaSi2O2N2). All compounds show afterglow emission, with an emission spectrum which is similar to the steady state photoluminescence. The afterglow decay time for BaSi2O2N2:Eu and SrSi2O2N2:Eu is about 50 and...journal article 2012
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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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Ding, X. (author), Liang, H. (author), Hou, D. (author), Su, Q. (author), Dorenbos, P. (author), Sun, S. (author), Tao, Y. (author)Ce3+-doped Ba3MgSi2O8 phosphors were prepared by a solid-state reaction route. The photoluminescence properties in the vacuum ultraviolet-vis spectral range and the x ray excited radioluminescence were investigated. Ce3+ ions were found to enter three different sites in the host lattice. Five excitation bands and two emission bands of Ce(1)3+...journal article 2011
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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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Dorenbos, S.N. (author)This thesis is about the development of a detector for single photons, particles of light. New techniques are being developed that require high performance single photon detection, such as quantum cryptography, single molecule detection, optical radar, ballistic imaging, circuit testing and fluorescence spectroscopy. Superconducting single...doctoral thesis 2011
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Rogers, E.G. (author), Dorenbos, P. (author), Van der Kolk, E. (author)The basic optical, electrical and chemical properties of the binary divalent, trivalent and tetravalent lanthanide (Ln = La, . . . , Lu) halides (F, Cl, Br and I), chalcogenides (O, S, Se and Te) and pnictides (N, P, As and Sb) were studied using an empirical model that utilizes the systematic behaviour in the energy difference between the...journal article 2011
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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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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