@article{21032,
  abstract     = {{<jats:p>In the last few decades, there has been much progress on low loss waveguides, very efficient photon-number detectors and nonlinear processes. Engineered sum-frequency conversion is now at a stage where it allows operation on arbitrary temporal broadband modes, thus making the spectral degree of freedom accessible for information coding. Hereby the information is often encoded into the temporal modes of a single photon. Here, we analyse the prospect of using multi-photon states or squeezed states in different temporal modes based on integrated optics devices. We describe an analogy between mode-selective sum-frequency conversion and a network of spatial beam splitters. Furthermore, we analyse the limits on the achievable squeezing in waveguides with current technology and the loss limits in the conversion process.</jats:p>
          <jats:p>This article is part of the themed issue ‘Quantum technology for the 21st century’.</jats:p>}},
  author       = {{Harder, G. and Ansari, V. and Bartley, Tim and Brecht, Benjamin and Silberhorn, Christine}},
  issn         = {{1364-503X}},
  journal      = {{Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences}},
  number       = {{2099}},
  title        = {{{Harnessing temporal modes for multi-photon quantum information processing based on integrated optics}}},
  doi          = {{10.1098/rsta.2016.0244}},
  volume       = {{375}},
  year         = {{2017}},
}

@article{21031,
  author       = {{Allgaier, Markus and Vigh, Gesche and Ansari, Vahid and Eigner, Christof and Quiring, Viktor and Ricken, Raimund and Brecht, Benjamin and Silberhorn, Christine}},
  issn         = {{2058-9565}},
  journal      = {{Quantum Science and Technology}},
  title        = {{{Fast time-domain measurements on telecom single photons}}},
  doi          = {{10.1088/2058-9565/aa7abb}},
  volume       = {{2}},
  year         = {{2017}},
}

@article{13906,
  author       = {{Sharapova, Polina and Luo, Kai Hong and Herrmann, Harald and Reichelt, Matthias and Meier, Torsten and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{12}},
  publisher    = {{IOP Publishing}},
  title        = {{{Toolbox for the design of LiNbO3-based passive and active integrated quantum circuits}}},
  doi          = {{10.1088/1367-2630/aa9033}},
  volume       = {{19}},
  year         = {{2017}},
}

@article{13905,
  author       = {{Sharapova, Polina and Luo, Kai Hong and Herrmann, Harald and Reichelt, Matthias and Silberhorn, Christine and Meier, Torsten}},
  issn         = {{2469-9926}},
  journal      = {{Physical Review A}},
  number       = {{4}},
  pages        = {{043857}},
  publisher    = {{American Physical Society}},
  title        = {{{Modified two-photon interference achieved by the manipulation of entanglement}}},
  doi          = {{10.1103/physreva.96.043857}},
  volume       = {{96}},
  year         = {{2017}},
}

@article{26061,
  author       = {{Sharapova, Polina and Luo, Kai Hong and Herrmann, Harald and Reichelt, Matthias and Meier, Torsten and Silberhorn, Christine}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  number       = {{12}},
  publisher    = {{IOP Publishing}},
  title        = {{{Toolbox for the design of LiNbO3-based passive and active integrated quantum circuits}}},
  doi          = {{10.1088/1367-2630/aa9033}},
  volume       = {{19}},
  year         = {{2017}},
}

@inproceedings{13903,
  author       = {{Höpker, Jan Philipp and Bartnick, Moritz and Meyer-Scott, Evan and Thiele, Frederik and Meier, Torsten and Bartley, Tim and Krapick, Stephan and Montaut, Nicola M. and Santandrea, Matteo and Herrmann, Harald and Lengeling, Sebastian and Ricken, Raimund and Quiring, Viktor and Lita, Adriana E. and Verma, Varun B. and Gerrits, Thomas and Nam, Sae Woo and Silberhorn, Christine}},
  booktitle    = {{Quantum Photonic Devices}},
  editor       = {{Agio, Mario and Srinivasan, Kartik and Soci, Cesare}},
  isbn         = {{9781510611733}},
  pages        = {{1035809}},
  publisher    = {{SPIE}},
  title        = {{{Towards integrated superconducting detectors on lithium niobate waveguides}}},
  doi          = {{10.1117/12.2273388}},
  volume       = {{10358}},
  year         = {{2017}},
}

@article{26040,
  author       = {{Stefszky, Michael and Ricken, R. and Eigner, Christof and Quiring, V. and Herrmann, Harald and Silberhorn, Christine}},
  issn         = {{2331-7019}},
  journal      = {{Physical Review Applied}},
  title        = {{{Waveguide Cavity Resonator as a Source of Optical Squeezing}}},
  doi          = {{10.1103/physrevapplied.7.044026}},
  year         = {{2017}},
}

@article{4239,
  abstract     = {{Confocal Raman spectroscopy is applied to identify ferroelectric domain structure sensitive
phonon modes in potassium titanyl phosphate. Therefore, polarization-dependent measurements in
various scattering configurations have been performed to characterize the fundamental Raman
spectra of the material. The obtained spectra are discussed qualitatively based on an internal mode
assignment. In the main part of this work, we have characterized z-cut periodically poled potassium
titanyl phosphate in terms of polarity- and structure-sensitive phonon modes. Here, we find vibrations
whose intensities are linked to the ferroelectric domain walls. We interpret this in terms of
changes in the polarizability originating from strain induced by domain boundaries and the inner
field distribution. Hence, a direct and 3D visualization of ferroelectric domain structures becomes
possible in potassium titanyl phosphate.}},
  author       = {{Rüsing, Michael and Eigner, Christof and Mackwitz, P. and Berth, Gerhard and Silberhorn, Christine and Zrenner, Artur}},
  issn         = {{0021-8979}},
  journal      = {{Journal of Applied Physics}},
  number       = {{4}},
  publisher    = {{AIP Publishing}},
  title        = {{{Identification of ferroelectric domain structure sensitive phonon modes in potassium titanyl phosphate: A fundamental study}}},
  doi          = {{10.1063/1.4940964}},
  volume       = {{119}},
  year         = {{2016}},
}

@article{38061,
  author       = {{Schleich, Wolfgang P. and Ranade, Kedar S. and Anton, Christian and Arndt, Markus and Aspelmeyer, Markus and Bayer, Manfred and Berg, Gunnar and Calarco, Tommaso and Fuchs, Harald and Giacobino, Elisabeth and Grassl, Markus and Hänggi, Peter and Heckl, Wolfgang M. and Hertel, Ingolf-Volker and Huelga, Susana and Jelezko, Fedor and Keimer, Bernhard and Kotthaus, Jörg P. and Leuchs, Gerd and Lütkenhaus, Norbert and Maurer, Ueli and Pfau, Tilman and Plenio, Martin B. and Rasel, Ernst Maria and Renn, Ortwin and Silberhorn, Christine and Schiedmayer, Jörg and Schmitt-Landsiedel, Doris and Schönhammer, Kurt and Ustinov, Alexey and Walther, Philip and Weinfurter, Harald and Welzl, Emo and Wiesendanger, Roland and Wolf, Stefan and Zeilinger, Anton and Zoller, Peter}},
  issn         = {{0946-2171}},
  journal      = {{Applied Physics B}},
  keywords     = {{General Physics and Astronomy, Physics and Astronomy (miscellaneous), General Engineering}},
  number       = {{5}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Quantum technology: from research to application}}},
  doi          = {{10.1007/s00340-016-6353-8}},
  volume       = {{122}},
  year         = {{2016}},
}

@article{38068,
  author       = {{Szemendera, L. and Darré, P. and Baudoin, R. and Grossard, L. and Delage, L. and Herrmann, Harald and Silberhorn, Christine and Reynaud, F.}},
  issn         = {{0035-8711}},
  journal      = {{Monthly Notices of the Royal Astronomical Society}},
  keywords     = {{Space and Planetary Science, Astronomy and Astrophysics}},
  number       = {{3}},
  pages        = {{3115--3118}},
  publisher    = {{Oxford University Press (OUP)}},
  title        = {{{In-lab ALOHA mid-infrared up-conversion interferometer with high fringe contrast @λ = 3.39 μm}}},
  doi          = {{10.1093/mnras/stw196}},
  volume       = {{457}},
  year         = {{2016}},
}

@article{38071,
  author       = {{Harder, G. and Silberhorn, Christine and Rehacek, J. and Hradil, Z. and Motka, L. and Stoklasa, B. and Sánchez-Soto, L. L.}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  keywords     = {{General Physics and Astronomy}},
  number       = {{13}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Local Sampling of the Wigner Function at Telecom Wavelength with Loss-Tolerant Detection of Photon Statistics}}},
  doi          = {{10.1103/physrevlett.116.133601}},
  volume       = {{116}},
  year         = {{2016}},
}

@article{38086,
  author       = {{Tiranov, Alexey and Lavoie, Jonathan and Ferrier, Alban and Goldner, Philippe and Verma, Varun B. and Nam, Sae Woo and Mirin, Richard P. and Lita, Adriana E. and Marsili, Francesco and Herrmann, Harald and Silberhorn, Christine and Gisin, Nicolas and Afzelius, Mikael and Bussières, Félix}},
  issn         = {{2334-2536}},
  journal      = {{Optica}},
  keywords     = {{Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}},
  number       = {{4}},
  publisher    = {{The Optical Society}},
  title        = {{{Storage of hyperentanglement in a solid-state quantum memory}}},
  doi          = {{10.1364/optica.2.000279}},
  volume       = {{2}},
  year         = {{2015}},
}

@article{38087,
  author       = {{Covi, M. and Pressl, B. and Günthner, T. and Laiho, K. and Krapick, Stefan and Silberhorn, Christine and Weihs, G.}},
  issn         = {{0946-2171}},
  journal      = {{Applied Physics B}},
  keywords     = {{General Physics and Astronomy, Physics and Astronomy (miscellaneous), General Engineering}},
  number       = {{3}},
  pages        = {{489--495}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Liquid-nitrogen cooled, free-running single-photon sensitive detector at telecommunication wavelengths}}},
  doi          = {{10.1007/s00340-015-6019-y}},
  volume       = {{118}},
  year         = {{2015}},
}

@article{26333,
  author       = {{Sperling, Jan and Bohmann, M. and Vogel, W. and Harder, G. and Brecht, Benjamin and Ansari, V. and Silberhorn, Christine}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  title        = {{{Uncovering Quantum Correlations with Time-Multiplexed Click Detection}}},
  doi          = {{10.1103/physrevlett.115.023601}},
  year         = {{2015}},
}

@article{31296,
  author       = {{Barkhofen, Sonja and Faure, F and Weich, Tobias}},
  issn         = {{0951-7715}},
  journal      = {{Nonlinearity}},
  keywords     = {{Applied Mathematics, General Physics and Astronomy, Mathematical Physics, Statistical and Nonlinear Physics}},
  number       = {{8}},
  pages        = {{1829--1858}},
  publisher    = {{IOP Publishing}},
  title        = {{{Resonance chains in open systems, generalized zeta functions and clustering of the length spectrum}}},
  doi          = {{10.1088/0951-7715/27/8/1829}},
  volume       = {{27}},
  year         = {{2014}},
}

@article{38088,
  author       = {{Shayovitz, Dror and Herrmann, Harald and Sohler, Wolfgang and Ricken, Raimund and Silberhorn, Christine and Marom, Dan M.}},
  issn         = {{1094-4087}},
  journal      = {{Optics Express}},
  keywords     = {{Atomic and Molecular Physics, and Optics}},
  number       = {{25}},
  publisher    = {{The Optical Society}},
  title        = {{{Real-time coherent detection of phase modulated ultrashort pulses after time-to-space conversion and spatial demultiplexing}}},
  doi          = {{10.1364/oe.22.031138}},
  volume       = {{22}},
  year         = {{2014}},
}

@article{38089,
  author       = {{Harder, G. and Silberhorn, Christine and Rehacek, J. and Hradil, Z. and Motka, L. and Stoklasa, B. and Sánchez-Soto, L. L.}},
  issn         = {{1050-2947}},
  journal      = {{Physical Review A}},
  keywords     = {{Atomic and Molecular Physics, and Optics}},
  number       = {{4}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Time-multiplexed measurements of nonclassical light at telecom wavelengths}}},
  doi          = {{10.1103/physreva.90.042105}},
  volume       = {{90}},
  year         = {{2014}},
}

@article{38090,
  author       = {{Bussières, Félix and Clausen, Christoph and Tiranov, Alexey and Korzh, Boris and Verma, Varun B. and Nam, Sae Woo and Marsili, Francesco and Ferrier, Alban and Goldner, Philippe and Herrmann, Harald and Silberhorn, Christine and Sohler, Wolfgang and Afzelius, Mikael and Gisin, Nicolas}},
  issn         = {{1749-4885}},
  journal      = {{Nature Photonics}},
  keywords     = {{Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}},
  number       = {{10}},
  pages        = {{775--778}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory}}},
  doi          = {{10.1038/nphoton.2014.215}},
  volume       = {{8}},
  year         = {{2014}},
}

@article{38091,
  author       = {{Clausen, C and Bussières, F and Tiranov, A and Herrmann, Harald and Silberhorn, Christine and Sohler, W and Afzelius, M and Gisin, N}},
  issn         = {{1367-2630}},
  journal      = {{New Journal of Physics}},
  keywords     = {{General Physics and Astronomy}},
  number       = {{9}},
  publisher    = {{IOP Publishing}},
  title        = {{{A source of polarization-entangled photon pairs interfacing quantum memories with telecom photons}}},
  doi          = {{10.1088/1367-2630/16/9/093058}},
  volume       = {{16}},
  year         = {{2014}},
}

@article{38095,
  author       = {{Solntsev, Alexander S. and Setzpfandt, Frank and Clark, Alex S. and Wu, Che Wen and Collins, Matthew J. and Xiong, Chunle and Schreiber, Andreas and Katzschmann, Fabian and Eilenberger, Falk and Schiek, Roland and Sohler, Wolfgang and Mitchell, Arnan and Silberhorn, Christine and Eggleton, Benjamin J. and Pertsch, Thomas and Sukhorukov, Andrey A. and Neshev, Dragomir N. and Kivshar, Yuri S.}},
  issn         = {{2160-3308}},
  journal      = {{Physical Review X}},
  keywords     = {{General Physics and Astronomy}},
  number       = {{3}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Generation of Nonclassical Biphoton States through Cascaded Quantum Walks on a Nonlinear Chip}}},
  doi          = {{10.1103/physrevx.4.031007}},
  volume       = {{4}},
  year         = {{2014}},
}