@article{40381,
  abstract     = {{<jats:title>Abstract</jats:title>
               <jats:p>The phenomenon of entanglement is the basis of quantum information and quantum communication processes. Entangled systems with a large number of photons are of great interest at present because they provide a platform for streaming technologies based on photonics. In this paper we present a device which operates with four-photons and based on the Hong–Ou–Mandel interference. The presented device allows to maximize the degree of spatial entanglement and generate the highly entangled four-dimensional Bell states. Furthermore, the use of the interferometer in different regimes leads to fast interference fringes in the coincidence probability with period of oscillations twice smaller than the pump wavelength. We have a good agreement between theoretical simulations and experimental results.</jats:p>}},
  author       = {{Ferreri, A and Ansari, V and Brecht, Benjamin and Silberhorn, Christine and Sharapova, Polina R.}},
  issn         = {{2058-9565}},
  journal      = {{Quantum Science and Technology}},
  keywords     = {{Electrical and Electronic Engineering, Physics and Astronomy (miscellaneous), Materials Science (miscellaneous), Atomic and Molecular Physics, and Optics}},
  number       = {{4}},
  publisher    = {{IOP Publishing}},
  title        = {{{Spatial entanglement and state engineering via four-photon Hong–Ou–Mandel interference}}},
  doi          = {{10.1088/2058-9565/abb411}},
  volume       = {{5}},
  year         = {{2020}},
}

@article{37933,
  abstract     = {{<jats:p>We present a time-over-threshold readout technique to count the number of activated pixels from an array of superconducting nanowire single photon detectors (SNSPDs). This technique places no additional heatload on the cryostat, and retains the intrinsic count rate of the time-tagger. We demonstrate proof-of-principle operation with respect to a four-pixel device. Furthermore, we show that, given some permissible error threshold, the number of pixels that can be reliably read out scales linearly with the intrinsic signal-to-noise ratio of the individual pixel response.</jats:p>}},
  author       = {{Tiedau, Johannes and Schapeler, Timon and Anant, Vikas and Fedder, Helmut and Silberhorn, Christine and Bartley, Tim}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  keywords     = {{Atomic and Molecular Physics, and Optics}},
  number       = {{4}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Single-channel electronic readout of a multipixel superconducting nanowire single photon detector}}},
  doi          = {{10.1364/oe.383111}},
  volume       = {{28}},
  year         = {{2020}},
}

@article{20156,
  author       = {{Schapeler, Timon and Höpker, Jan Philipp and Bartley, Tim}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  title        = {{{Quantum detector tomography of a 2×2 multi-pixel array of superconducting nanowire single photon detectors}}},
  doi          = {{10.1364/oe.404285}},
  year         = {{2020}},
}

@article{63038,
  author       = {{Sistani, Masiar and Bartmann, Maximilian G. and Güsken, Nicholas Alexander and Oulton, Rupert F. and Keshmiri, Hamid and Luong, Minh Anh and Momtaz, Zahra Sadre and Den Hertog, Martien I. and Lugstein, Alois}},
  issn         = {{2330-4022}},
  journal      = {{ACS Photonics}},
  number       = {{7}},
  pages        = {{1642--1648}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Plasmon-Driven Hot Electron Transfer at Atomically Sharp Metal–Semiconductor Nanojunctions}}},
  doi          = {{10.1021/acsphotonics.0c00557}},
  volume       = {{7}},
  year         = {{2020}},
}

@article{63042,
  author       = {{Sistani, Masiar and Bartmann, Maximilian G. and Güsken, Nicholas Alexander and Oulton, Rupert F. and Keshmiri, Hamid and Luong, Minh Anh and Robin, Eric and den Hertog, Martien I. and Lugstein, Alois}},
  issn         = {{1932-7447}},
  journal      = {{The Journal of Physical Chemistry C}},
  number       = {{25}},
  pages        = {{13872--13877}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Stimulated Raman Scattering in Ge Nanowires}}},
  doi          = {{10.1021/acs.jpcc.0c02602}},
  volume       = {{124}},
  year         = {{2020}},
}

@inbook{24959,
  author       = {{Bauer, Anna and Reinhold, Peter and Sacher, Marc}},
  booktitle    = {{Naturwissenschaftliche Bildung als Grundlage für berufliche und gesellschaftliche Teilhabe}},
  editor       = {{Maurer, Christian}},
  pages        = {{632--635}},
  publisher    = {{Gesellschaft für Didaktik der Chemie und Physik}},
  title        = {{{Erhebung der experimentellen Performanz (Physik-)Studierender}}},
  year         = {{2019}},
}

@article{25038,
  author       = {{Massaro, Marcello and Meyer-Scott, Evan and Montaut, Nicola and Herrmann, Harald and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Improving SPDC single-photon sources via extended heralding and feed-forward control}}},
  doi          = {{10.1088/1367-2630/ab1ec3}},
  year         = {{2019}},
}

@article{26226,
  author       = {{Santandrea, Matteo and Stefszky, Michael and Ansari, Vahid and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  title        = {{{Fabrication limits of waveguides in nonlinear crystals and their impact on quantum optics applications}}},
  doi          = {{10.1088/1367-2630/aaff13}},
  year         = {{2019}},
}

@article{26237,
  author       = {{Luo, Kai-Hong and Ansari, Vahid and Massaro, Marcello and Santandrea, Matteo and Eigner, Christof and Ricken, Raimund and Herrmann, Harald and Silberhorn, Christine}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  title        = {{{Counter-propagating photon pair generation in a nonlinear waveguide}}},
  doi          = {{10.1364/oe.378789}},
  year         = {{2019}},
}

@article{20890,
  author       = {{Engelkemeier, Katja and Lindner, Jörg K N and Bürger, Julius and Vaupel, Kathrin and Hartmann, Marc and Tiemann, Michael and Hoyer, Kay-Peter and Schaper, Mirko}},
  issn         = {{0957-4484}},
  journal      = {{Nanotechnology}},
  title        = {{{Nano-architectural complexity of zinc oxide nanowall hollow microspheres and their structural properties}}},
  doi          = {{10.1088/1361-6528/ab55bc}},
  year         = {{2019}},
}

@article{7800,
  author       = {{Henksmeier, Tobias and Shvarkov, Stepan and Trapp, Alexander and Reuter, Dirk}},
  issn         = {{0022-0248}},
  journal      = {{Journal of Crystal Growth}},
  pages        = {{164--168}},
  publisher    = {{Elsevier BV}},
  title        = {{{Molecular beam epitaxy growth and temperature-dependent electrical characterization of carbon-doped GaAs on GaAs(1 1 1)B}}},
  doi          = {{10.1016/j.jcrysgro.2019.02.006}},
  volume       = {{512}},
  year         = {{2019}},
}

@article{8797,
  abstract     = {{Free from phase-matching constraints, plasmonic metasurfaces have contributed significantly to the control of optical nonlinearity and enhancement of nonlinear generation efficiency by engineering subwavelength meta-atoms. However, high dissipative losses and inevitable thermal heating limit their applicability in nonlinear nanophotonics. All-dielectric metasurfaces, supporting both electric and magnetic Mie-type resonances in their nanostructures, have appeared as a promising alternative to nonlinear plasmonics. High-index dielectric nanostructures, allowing additional magnetic resonances, can induce magnetic nonlinear effects, which, along with electric nonlinearities, increase the nonlinear conversion efficiency. In addition, low dissipative losses and high damage thresholds provide an extra degree of freedom for operating at high pump intensities, resulting in a considerable enhancement of the nonlinear processes. We discuss the current state of the art in the intensely developing area of all-dielectric nonlinear nanostructures and metasurfaces, including the role of Mie modes, Fano resonances, and anapole moments for harmonic generation, wave mixing, and ultrafast optical switching. Furthermore, we review the recent progress in the nonlinear phase and wavefront control using all-dielectric metasurfaces. We discuss techniques to realize all-dielectric metasurfaces for multifunctional applications and generation of second-order nonlinear processes from complementary metal–oxide–semiconductor-compatible materials.}},
  author       = {{Sain, Basudeb and Meier, Cedrik and Zentgraf, Thomas}},
  issn         = {{2577-5421}},
  journal      = {{Advanced Photonics}},
  number       = {{2}},
  pages        = {{024002}},
  title        = {{{Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review}}},
  doi          = {{10.1117/1.ap.1.2.024002}},
  volume       = {{1}},
  year         = {{2019}},
}

@inproceedings{9635,
  author       = {{Meyer-Scott, Evan and Prasannan, Nidhin and Montaut, Nicola and Tiedau, Johannes and Eigner, Christof and Harder, Georg and Sansoni, Linda and Nitsche, Thomas and Herrmann, Harald and Ricken, Raimund and Quiring, Viktor and Bartley, Tim and Barkhofen, Sonja and Silberhorn, Christine}},
  booktitle    = {{Advances in Photonics of Quantum Computing, Memory, and Communication XII}},
  editor       = {{Hasan, Zameer U. and Hemmer, Philip R. and Migdall, Alan L.}},
  isbn         = {{9781510625082}},
  title        = {{{Engineering integrated photon pair sources and multiplexed detectors (Conference Presentation)}}},
  doi          = {{10.1117/12.2513753}},
  year         = {{2019}},
}

@article{9698,
  author       = {{Golla, C. and Weber, N. and Meier, Cedrik}},
  issn         = {{0021-8979}},
  journal      = {{Journal of Applied Physics}},
  number       = {{7}},
  title        = {{{Zinc oxide based dielectric nanoantennas for efficient nonlinear frequency conversion}}},
  doi          = {{10.1063/1.5082720}},
  volume       = {{125}},
  year         = {{2019}},
}

@article{9826,
  author       = {{Tiedau, Johannes and Meyer-Scott, Evan and Nitsche, Thomas and Barkhofen, Sonja and Bartley, Tim and Silberhorn, Christine}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  title        = {{{A high dynamic range optical detector for measuring single photons and bright light}}},
  doi          = {{10.1364/oe.27.000001}},
  year         = {{2019}},
}

@article{9897,
  author       = {{Protte, Maximilian and Weber, Nils and Golla, Christian and Zentgraf, Thomas and Meier, Cedrik}},
  issn         = {{0021-8979}},
  journal      = {{Journal of Applied Physics}},
  title        = {{{Strong nonlinear optical response from ZnO by coupled and lattice-matched nanoantennas}}},
  doi          = {{10.1063/1.5093257}},
  volume       = {{125}},
  year         = {{2019}},
}

@article{11953,
  abstract     = {{As flexible optical devices that can manipulate the phase and amplitude of light, metasurfaces would clearly benefit from directional optical properties. However, single layer metasurface systems consisting of two-dimensional nanoparticle arrays exhibit only a weak spatial asymmetry perpendicular to the surface and therefore have mostly symmetric transmission features. Here, we present a metasurface design principle for nonreciprocal polarization encryption of holographic images. Our approach is based on a two-layer plasmonic metasurface design that introduces a local asymmetry and generates a bidirectional functionality with full phase and amplitude control of the transmitted light. The encoded hologram is designed to appear in a particular linear cross-polarization channel, while it is disappearing in the reverse propagation direction. Hence, layered metasurface systems can feature asymmetric transmission with full phase and amplitude control and therefore expand the design freedom in nanoscale optical devices toward asymmetric information processing and security features for anticounterfeiting applications.}},
  author       = {{Frese, Daniel and Wei, Qunshuo and Wang, Yongtian and Huang, Lingling and Zentgraf, Thomas}},
  issn         = {{1530-6984}},
  journal      = {{Nano Letters}},
  number       = {{6}},
  pages        = {{3976--3980}},
  title        = {{{Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces}}},
  doi          = {{10.1021/acs.nanolett.9b01298}},
  volume       = {{19}},
  year         = {{2019}},
}

@article{11955,
  author       = {{Li, Tianyou and Wei, Qunshuo and Reineke, Bernhard and Walter, Felicitas and Wang, Yongtian and Zentgraf, Thomas and Huang, Lingling}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  number       = {{15}},
  pages        = {{21153--21162}},
  title        = {{{Reconfigurable metasurface hologram by utilizing addressable dynamic pixels}}},
  doi          = {{10.1364/oe.27.021153}},
  volume       = {{27}},
  year         = {{2019}},
}

@article{12917,
  author       = {{Reineke, Bernhard and Sain, Basudeb and Zhao, Ruizhe and Carletti, Luca and Liu, Bingyi and Huang, Lingling and de Angelis, Costantino and Zentgraf, Thomas}},
  issn         = {{1530-6984}},
  journal      = {{Nano Letters}},
  number       = {{9}},
  pages        = {{6585–6591}},
  title        = {{{Silicon metasurfaces for third harmonic geometric phase manipulation and multiplexed holography}}},
  doi          = {{10.1021/acs.nanolett.9b02844}},
  volume       = {{19}},
  year         = {{2019}},
}

@article{12919,
  author       = {{Georgi, Philip and Massaro, Marcello and Luo, Kai Hong and Sain, Basudeb and Montaut, Nicola and Herrmann, Harald and Weiss, Thomas and Li, Guixin and Silberhorn, Christine and Zentgraf, Thomas}},
  issn         = {{2047-7538}},
  journal      = {{Light: Science & Applications}},
  pages        = {{70}},
  title        = {{{Metasurface interferometry toward quantum sensors}}},
  doi          = {{10.1038/s41377-019-0182-6}},
  volume       = {{8}},
  year         = {{2019}},
}