@article{40431,
  author       = {{Praschan, Tom and Heinze, Dirk and Breddermann, Dominik and Zrenner, Artur and Walther, Andrea and Schumacher, Stefan}},
  issn         = {{2469-9950}},
  journal      = {{Physical Review B}},
  number       = {{4}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton}}},
  doi          = {{10.1103/physrevb.105.045302}},
  volume       = {{105}},
  year         = {{2022}},
}

@misc{40428,
  author       = {{Jonas, Björn and Heinze, Dirk Florian and Schöll, Eva and Kallert, Patricia and Langer, Timo and Krehs, Sebastian and Widhalm, Alex and Jöns, Klaus and Reuter, Dirk and Zrenner, Artur}},
  publisher    = {{LibreCat University}},
  title        = {{{Nonlinear down-conversion in a single quantum dot}}},
  doi          = {{10.5281/ZENODO.6024228}},
  year         = {{2022}},
}

@article{37711,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Polarons influence decisively the performance of lithium niobate for optical applications. In this work, the formation of (defect) bound polarons in lithium niobate is studied by ab initio molecular dynamics. The calculations show a broad scatter of polaron formation times. Rising temperature increases the share of trajectories with long formation times, which leads to an overall increase of the average formation time with temperature. However, even at elevated temperatures, the average formation time does not exceed the value of 100 femtoseconds, i.e., a value close to the time measured for free, i.e., self-trapped polarons. Analyzing individual trajectories, it is found that the time required for the structural relaxation of the polarons depends sensitively on the excitation of the lithium niobate high-frequency phonon modes and their phase relation.</jats:p>}},
  author       = {{Krenz, Marvin and Gerstmann, Uwe and Schmidt, Wolf Gero}},
  issn         = {{0947-8396}},
  journal      = {{Applied Physics A}},
  keywords     = {{General Materials Science, General Chemistry}},
  pages        = {{480}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Bound polaron formation in lithium niobate from ab initio molecular dynamics}}},
  doi          = {{10.1007/s00339-022-05577-y}},
  volume       = {{128}},
  year         = {{2022}},
}

@inproceedings{43744,
  abstract     = {{We demonstrate theoretically and experimentally complex correlations in the photon numbers of two-mode quantum states using measurement-induced nonlinearity. For this, we combine the interference of coherent states and single photons with photon sub-traction.}},
  author       = {{Meier, Torsten and Hoepker, Jan Philipp and Protte, Maximilian and Eigner, Christof and Silberhorn, Christine and Sharapova, Polina R. and Sperling, Jan and Bartley, Tim}},
  booktitle    = {{Conference on Lasers and Electro-Optics: Applications and Technology}},
  isbn         = {{978-1-957171-05-0}},
  location     = {{San Jose, California United States}},
  pages        = {{JTu3A. 17}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Two-Mode Photon-Number Correlations Created by Measurement-Induced Nonlinearity}}},
  doi          = {{10.1364/CLEO_AT.2022.JTu3A.17}},
  year         = {{2022}},
}

@article{33484,
  abstract     = {{We study the DC conductivity in potassium titanyl phosphate (KTiOPO4, KTP) and its isomorphs KTiOAsO4 (KTA) and Rb1%K99%TiOPO4 (RKTP) and introduce a method by which to reduce the overall ionic conductivity in KTP by a potassium nitrate treatment. Furthermore, we create so-called gray tracking in KTP and investigate the ionic conductivity in theses areas. A local unintended reduction of the ionic conductivity is observed in the gray-tracked regions, which also induce additional optical absorption in the material. We show that a thermal treatment in an oxygen-rich atmosphere removes the gray tracking and brings the ionic conductivity as well as the optical transmission back to the original level. These studies can help to choose the best material and treatment for specific applications.}},
  author       = {{Padberg, Laura and Quiring, Viktor and Bocchini, Adriana and Santandrea, Matteo and Gerstmann, Uwe and Schmidt, Wolf Gero and Silberhorn, Christine and Eigner, Christof}},
  issn         = {{2073-4352}},
  journal      = {{Crystals}},
  pages        = {{1359}},
  title        = {{{DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking}}},
  doi          = {{10.3390/cryst12101359}},
  volume       = {{12}},
  year         = {{2022}},
}

@inproceedings{30389,
  abstract     = {{Online solvers for a series of standard 1-D or 2-D problems in integrated optics will be discussed. Implemented on the basis of HTML/JavaScript/SVG with core routines compiled from well tested C++-sources, the quasi-analytical algorithms require a computational load that can be handled easily even by current mobile devices. So far the series covers the 1-D guided modes of dielectric multilayer slab waveguides and the oblique plane wave reflection from these, the modes of rectangular channel waveguides (in an approximation of effective indices), bend modes of curved multilayer slabs, whispering-gallery resonances (“Quasi-Normal-Modes”) supported by circular dielectric cavities, the hybrid modes of circular multi-step-index optical fibers, bound and leaky modes of 1-D complex multilayers, including plasmonic surface modes, and, with restrictions, quite general rectangular scattering problems in 2-D.}},
  author       = {{Hammer, Manfred}},
  booktitle    = {{Integrated Optics: Devices, Materials, and Technologies XXVI}},
  editor       = {{García-Blanco, Sonia M. and Cheben, Pavel}},
  keywords     = {{tet_topic_waveguide}},
  pages        = {{1200414}},
  publisher    = {{SPIE}},
  title        = {{{Small-scale online simulations in guided-wave photonics}}},
  doi          = {{10.1117/12.2612208}},
  year         = {{2022}},
}

@article{26627,
  abstract     = {{Many-body perturbation theory based on density-functional theory calculations is used to determine the quasiparticle band structures and the dielectric functions of the isomorphic ferroelectrics rubidium titanyl phosphate (RbTiOPO4) and potassium titanyl arsenide (KTiOAsO4). Self-energy corrections of more than 2 eV are found to widen the transport band gaps of both materials considerably to 5.3 and 5.2 eV, respectively. At the same time, both materials are characterized by strong exciton binding energies of 1.4 and 1.5 eV, respectively. The solution of the Bethe-Salpeter equation based on the quasiparticle energies results in onsets of the optical absorption within the range of the measured data.}},
  author       = {{Neufeld, Sergej and Schindlmayr, Arno and Schmidt, Wolf Gero}},
  issn         = {{2515-7639}},
  journal      = {{Journal of Physics: Materials}},
  number       = {{1}},
  publisher    = {{IOP Publishing}},
  title        = {{{Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4}}},
  doi          = {{10.1088/2515-7639/ac3384}},
  volume       = {{5}},
  year         = {{2022}},
}

@article{37656,
  author       = {{Glahn, Luis Joel and Ruiz Alvarado, Isaac Azahel and Neufeld, Sergej and Zare Pour, Mohammad Amin and Paszuk, Agnieszka and Ostheimer, David and Shekarabi, Sahar and Romanyuk, Oleksandr and Moritz, Dominik Christian and Hofmann, Jan Philipp and Jaegermann, Wolfram and Hannappel, Thomas and Schmidt, Wolf Gero}},
  issn         = {{0370-1972}},
  journal      = {{physica status solidi (b)}},
  keywords     = {{Condensed Matter Physics, Electronic, Optical and Magnetic Materials}},
  number       = {{11}},
  publisher    = {{Wiley}},
  title        = {{{Clean and Hydrogen‐Adsorbed AlInP(001) Surfaces: Structures and Electronic Properties}}},
  doi          = {{10.1002/pssb.202200308}},
  volume       = {{259}},
  year         = {{2022}},
}

@article{37710,
  author       = {{Ruiz Alvarado, Isaac Azahel and Schmidt, Wolf Gero}},
  issn         = {{2470-1343}},
  journal      = {{ACS Omega}},
  keywords     = {{General Chemical Engineering, General Chemistry}},
  number       = {{23}},
  pages        = {{19355--19364}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Water/InP(001) from Density Functional Theory}}},
  doi          = {{10.1021/acsomega.2c00948}},
  volume       = {{7}},
  year         = {{2022}},
}

@article{37681,
  author       = {{Moritz, Dominik Christian and Ruiz Alvarado, Isaac Azahel and Zare Pour, Mohammad Amin and Paszuk, Agnieszka and Frieß, Tilo and Runge, Erich and Hofmann, Jan P. and Hannappel, Thomas and Schmidt, Wolf Gero and Jaegermann, Wolfram}},
  issn         = {{1944-8244}},
  journal      = {{ACS Applied Materials &amp; Interfaces}},
  keywords     = {{General Materials Science}},
  number       = {{41}},
  pages        = {{47255--47261}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{P-Terminated InP (001) Surfaces: Surface Band Bending and Reactivity to Water}}},
  doi          = {{10.1021/acsami.2c13352}},
  volume       = {{14}},
  year         = {{2022}},
}

@article{37714,
  author       = {{Karmo, Marsel and Ruiz Alvarado, Isaac Azahel and Schmidt, Wolf Gero and Runge, Erich}},
  issn         = {{2470-1343}},
  journal      = {{ACS Omega}},
  keywords     = {{General Chemical Engineering, General Chemistry}},
  number       = {{6}},
  pages        = {{5064--5068}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Reconstructions of the As-Terminated GaAs(001) Surface Exposed to Atomic Hydrogen}}},
  doi          = {{10.1021/acsomega.1c06019}},
  volume       = {{7}},
  year         = {{2022}},
}

@article{34884,
  author       = {{Prasannan, Nidhin and Sperling, Jan and Brecht, Benjamin and Silberhorn, Christine}},
  issn         = {{0031-9007}},
  journal      = {{Physical Review Letters}},
  keywords     = {{General Physics and Astronomy}},
  number       = {{26}},
  publisher    = {{American Physical Society (APS)}},
  title        = {{{Direct Measurement of Higher-Order Nonlinear Polarization Squeezing}}},
  doi          = {{10.1103/physrevlett.129.263601}},
  volume       = {{129}},
  year         = {{2022}},
}

@article{40423,
  abstract     = {{<jats:p>Lewis-acid doping of organic semiconductors (OSCs) opens up new ways of p-type doping and has recently become of significant interest.</jats:p>}},
  author       = {{Bauch, Fabian and Dong, Chuan-Ding and Schumacher, Stefan}},
  issn         = {{2046-2069}},
  journal      = {{RSC Advances}},
  keywords     = {{General Chemical Engineering, General Chemistry}},
  number       = {{22}},
  pages        = {{13999--14006}},
  publisher    = {{Royal Society of Chemistry (RSC)}},
  title        = {{{Protonation-induced charge transfer and polaron formation in organic semiconductors doped by Lewis acids}}},
  doi          = {{10.1039/d2ra02032g}},
  volume       = {{12}},
  year         = {{2022}},
}

@article{40425,
  author       = {{Bathe, Thomas and Dong, Chuan-Ding and Schumacher, Stefan}},
  issn         = {{1089-5639}},
  journal      = {{The Journal of Physical Chemistry A}},
  keywords     = {{Physical and Theoretical Chemistry}},
  number       = {{13}},
  pages        = {{2075--2081}},
  publisher    = {{American Chemical Society (ACS)}},
  title        = {{{Microscopic Study of Molecular Double Doping}}},
  doi          = {{10.1021/acs.jpca.1c09179}},
  volume       = {{126}},
  year         = {{2022}},
}

@article{33965,
  author       = {{Bocchini, Adriana and Gerstmann, Uwe and Bartley, Tim and Steinrück, Hans-Georg and Henkel, Gerald and Schmidt, Wolf Gero}},
  journal      = {{Phys. Rev. Materials}},
  pages        = {{105401}},
  publisher    = {{American Physical Society}},
  title        = {{{Electrochemical performance of KTiOAsO_4 (KTA) in potassium-ion batteries from density-functional theory}}},
  doi          = {{10.1103/PhysRevMaterials.6.105401}},
  volume       = {{6}},
  year         = {{2022}},
}

@article{31254,
  author       = {{Bocchini, Adriana and Gerstmann, Uwe and Schmidt, Wolf Gero}},
  journal      = {{Phys. Rev. B}},
  pages        = {{205118}},
  publisher    = {{American Physical Society}},
  title        = {{{Oxygen vacancies in KTiOPO_4: Optical absorption from hybrid DFT}}},
  doi          = {{10.1103/PhysRevB.105.205118}},
  volume       = {{105}},
  year         = {{2022}},
}

@article{32068,
  abstract     = {{Inspired by plant grafting, grafted vortex beams can be formed through grafting two or more helical phase profiles of optical vortex beams. Recently, grafted perfect vortex beams (GPVBs) have attracted much attention due to their unique optical properties and potential applications. However, the current method to generate and manipulate GPVBs requires a complex and bulky optical system, hindering further investigation and limiting its practical applications. Here, a compact metasurface approach for generating and manipulating GPVBs in multiple channels is proposed and demonstrated, which eliminates the need for such a complex optical setup. A single metasurface is utilized to realize various superpositions of GPVBs with different combinations of topological charges in four channels, leading to asymmetric singularity distributions. The positions of singularities in the superimposed beam can be further modulated by introducing an initial phase difference in the metasurface design. The work demonstrates a compact metasurface platform that performs a sophisticated optical task that is very challenging with conventional optics, opening opportunities for the investigation and applications of GPVBs in a wide range of emerging application areas, such as singular optics and quantum science.}},
  author       = {{Ahmed, Hammad and Intaravanne, Yuttana and Ming, Yang and Ansari, Muhammad Afnan and Buller, Gerald S. and Zentgraf, Thomas and Chen, Xianzhong}},
  issn         = {{0935-9648}},
  journal      = {{Advanced Materials}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  number       = {{30}},
  publisher    = {{Wiley}},
  title        = {{{Multichannel Superposition of Grafted Perfect Vortex Beams}}},
  doi          = {{10.1002/adma.202203044}},
  volume       = {{34}},
  year         = {{2022}},
}

@inproceedings{34238,
  abstract     = {{<jats:p>A monolithically integrated electronic-photonic Mach-Zehnder modulator is presented, incorporating electronic linear drivers along photonic components. An electro-optical 3 dB &amp; 6 dB bandwidth of 24 GHz and 34 GHz respectively was measured. The on-chip drivers decrease the V<jats:italic>
      <jats:sub>π</jats:sub>
    </jats:italic> by a factor of 10.</jats:p>}},
  author       = {{Kress, Christian and Schwabe, Tobias and Rhee, Hanjo and Kerman, Sarp and Scheytt, J. Christoph}},
  booktitle    = {{Optica Advanced Photonics Congress 2022}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Broadband Mach-Zehnder Modulator with Linear Driver in Electronic-Photonic Co-Integrated Platform}}},
  doi          = {{10.1364/iprsn.2022.im4c.1}},
  year         = {{2022}},
}

@inproceedings{46484,
  abstract     = {{Efficient third-harmonic generation control is theoretically studied. Dielectric nanostructures placed on the metallic substrate could offer effective geometric-phase modulation on third-harmonic signals by selecting proper structure rotational symmetry.}},
  author       = {{Liu, Bingyi and Huang, Lingling and Zentgraf, Thomas}},
  booktitle    = {{Conference on Lasers and Electro-Optics}},
  location     = {{San Jose, USA}},
  publisher    = {{Optica Publishing Group}},
  title        = {{{Efficient Third-harmonic Generation Control with Ultrathin Dielectric Geometric-phase Metasurface}}},
  doi          = {{10.1364/cleo_qels.2022.fth1a.7}},
  year         = {{2022}},
}

@article{32088,
  abstract     = {{Subwavelength dielectric resonators assembled into metasurfaces have become a versatile tool for miniaturizing optical components approaching the nanoscale. An important class of metasurface functionalities is associated with asymmetry in both the generation and transmission of light with respect to reversals of the positions of emitters and receivers. The nonlinear light–matter interaction in metasurfaces offers a promising pathway towards miniaturization of the asymmetric control of light. Here we demonstrate asymmetric parametric generation of light in nonlinear metasurfaces. We assemble dissimilar nonlinear dielectric resonators into translucent metasurfaces that produce images in the visible spectral range on being illuminated by infrared radiation. By design, the metasurfaces produce different and completely independent images for the reversed direction of illumination, that is, when the positions of the infrared emitter and the visible light receiver are exchanged. Nonlinearity-enabled asymmetric control of light by subwavelength resonators paves the way towards novel nanophotonic components via dense integration of large quantities of nonlinear resonators into compact metasurface designs.}},
  author       = {{Kruk, Sergey S. and Wang, Lei and Sain, Basudeb and Dong, Zhaogang and Yang, Joel and Zentgraf, Thomas and Kivshar, Yuri}},
  issn         = {{1749-4885}},
  journal      = {{Nature Photonics}},
  keywords     = {{Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials}},
  pages        = {{561–565}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Asymmetric parametric generation of images with nonlinear dielectric metasurfaces}}},
  doi          = {{10.1038/s41566-022-01018-7}},
  volume       = {{16}},
  year         = {{2022}},
}