Teil­pro­jekt A5

2025

Microscopic origin of gray tracks in KTiOPO4

A. Bocchini, U. Gerstmann, W.G. Schmidt, Physical Review B 111 (2025).


Mg dopants in lithium niobate (LiNbO3, LN): Defect models and impact on domain inversion

A. Bocchini, M. Rüsing, L. Bollmers, S. Lengeling, P. Mues, L. Padberg, U. Gerstmann, C. Silberhorn, C. Eigner, W.G. Schmidt, Physical Review Materials 9 (2025).


Phosphonic acid adsorption on α-Bi2O3 surfaces

A. Bocchini, S. Kollmann, U. Gerstmann, W.G. Schmidt, G. Grundmeier, Surface Science 760 (2025).


Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror

V. Devaraj, I.A. Ruiz Alvarado, J.-M. Lee, J.-W. Oh, U. Gerstmann, W.G. Schmidt, T. Zentgraf, Nanoscale Horizons 10 (2025) 537–548.


Entanglement between dependent degrees of freedom: Quasiparticle correlations

F. Barkhausen, L. Ares Santos, S. Schumacher, J. Sperling, Physical Review A 111 (2025).


Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface

J. Diederich, A. Paszuk, I.A. Ruiz Alvarado, M. Krenz, M.A. Zare Pour, D.S. Babu, J. Velazquez Rojas, C. Höhn, Y. Gao, K. Schwarzburg, D. Ostheimer, R. Eichberger, W.G. Schmidt, T. Hannappel, R. van de Krol, D. Friedrich, Advanced Materials Interfaces 12 (2025).


Finite-size and relativistic effects onto hyperfine interaction of muonic hydrogen

K.L. Franzke, W.G. Schmidt, U. Gerstmann, Journal of Physics: Conference Series 3027 (2025).



Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities

J. Wingenbach, L. Ares Santos, X. Ma, J. Sperling, S. Schumacher, Arxiv (2025).


TFLN channel waveguides of rib and strip type: Properties of guided modes

M. Hammer, S. Khan, B. Taheri, H. Farheen, J. Förstner, Optics Continuum 4 (2025) 2356.


Topology-optimized silicon nitride coupler for integrated single-photon emitters

H. Farheen, Y. Chen, P. Chen, A. Kryvobok, S. Peana, A. Senichev, V.M. Shalaev, A. Boltasseva, J. Förstner, A.V. Kildishev, in: X. Ni, W. Cai (Eds.), Photonic Computing: From Materials and Devices to Systems and Applications II, SPIE, 2025.


2024

Unbreakable and breakable quantum censorship

J. Pinske, J. Sperling, Physical Review A 109 (2024).


Relativistic calculation of the orbital hyperfine splitting in complex microscopic structures

K. Franzke, W.G. Schmidt, U. Gerstmann, Journal of Physics: Conference Series 2701 (2024).


Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H Interface

M. Krenz, U. Gerstmann, W.G. Schmidt, Physical Review Letters 132 (2024).



Quantum walks and entanglement in cavity networks

C. Di Fidio, L. Ares, J. Sperling, Physical Review A 110 (2024).


Optical Stark effect in type-II semiconductor heterostructures

F. Schäfer, A. Trautmann, C. Ngo, J.T. Steiner, C. Fuchs, K. Volz, F. Dobener, M. Stein, T. Meier, S. Chatterjee, Physical Review B 109 (2024).



Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides

M. Hammer, S. Babel, H. Farheen, L. Padberg, J.C. Scheytt, C. Silberhorn, J. Förstner, Optics Express 32 (2024) 22878.


Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with shallow etching

N. Üstün, H. Farheen, M. Hammer, J. Förstner, Journal of the Optical Society of America B 41 (2024) 2077.


Microscopic simulations of the dynamics of excitonic many-body correlations coupled to quantum light

H. Rose, P.R. Sharapova, T. Meier, in: M. Betz, A.Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XXVIII, SPIE, 2024.


An efficient compact blazed grating antenna for optical phased arrays

H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Journal of Physics: Photonics 6 (2024) 045010.


Guided modes of thin-film lithium niobate slabs

M. Hammer, H. Farheen, J. Förstner, Optics Continuum (2024) 532822.


Spin-Dependent Exciton–Exciton Interactions in a Mixed Lead Halide Perovskite Crystal

S. Grisard, A.V. Trifonov, T. Hahn, T. Kuhn, O. Hordiichuk, M.V. Kovalenko, D.R. Yakovlev, M. Bayer, I.A. Akimov, ACS Photonics 11 (2024).


Charge transfer magnetoexcitons in magnetoabsorption spectra of asymmetric type-II double quantum wells

J. Röder, M. Gerhard, C. Fuchs, W. Stolz, W. Heimbrodt, M. Koch, C. Ngo, J.T. Steiner, T. Meier, Physical Review B 110 (2024).


Experimental retrieval of photon statistics from click detection

S. Krishnaswamy, F. Schlue, L. Ares, V. Dyachuk, M. Stefszky, B. Brecht, C. Silberhorn, J. Sperling, Physical Review A 110 (2024).


Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities

A.D. Carr, C. Ruppert, A.K. Samusev, G. Magnabosco, N. Vogel, T.L. Linnik, A.W. Rushforth, M. Bayer, A.V. Scherbakov, A.V. Akimov, ACS Photonics 11 (2024).


Time-bin entanglement in the deterministic generation of linear photonic cluster states

D. Bauch, N. Köcher, N. Heinisch, S. Schumacher, APL Quantum 1 (2024).


Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons and entangled photon pairs

N. Heinisch, N. Köcher, D. Bauch, S. Schumacher, Physical Review Research 6 (2024).


Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates

T. Schneider, W. Gao, T. Zentgraf, S. Schumacher, X. Ma, Nanophotonics 13 (2024) 509–518.



Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells

M. Krenz, S. Sanna, U. Gerstmann, W.G. Schmidt, The Journal of Physical Chemistry C 128 (2024) 17774–17778.


2023

Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers

D. Scharwald, T. Meier, P.R. Sharapova, Physical Review Research 5 (2023).


On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs

D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, Advanced Quantum Technologies (2023).



Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family

S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn, L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).



Theoretical analysis of four-wave mixing on semiconductor quantum dot ensembles with quantum light

H. Rose, S. Grisard, A.V. Trifonov, R. Reichhardt, M. Reichelt, M. Bayer, I.A. Akimov, T. Meier, Theoretical Analysis of Four-Wave Mixing on Semiconductor Quantum Dot Ensembles with Quantum Light, LibreCat University, 2023.


Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays

H. Farheen, A. Strauch, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Photonics and Nanostructures - Fundamentals and Applications 58 (2023) 101207.


How to suppress radiative losses in high-contrast integrated Bragg gratings

M. Hammer, H. Farheen, J. Förstner, Journal of the Optical Society of America B 40 (2023) 862.


Optimized silicon antennas for optical phased arrays

H. Farheen, A. Strauch, J.C. Scheytt, V. Myroshnychenko, J. Förstner, in: S.M. García-Blanco, P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies XXVII, SPIE, 2023, p. 124241D.


Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas

H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, in: 2023 IEEE Photonics Conference (IPC), IEEE, 2023.


Temporal Sorting of Optical Multiwave-Mixing Processes in Semiconductor Quantum Dots

S. Grisard, A.V. Trifonov, H. Rose, R. Reichhardt, M. Reichelt, C. Schneider, M. Kamp, S. Höfling, M. Bayer, T. Meier, I.A. Akimov, ACS Photonics 10 (2023) 3161–3170.


Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers

D. Scharwald, T. Meier, P. Sharapova, Physical Review Research 5 (2023).


Nonlinear Dielectric Nanoresonators and Metasurfaces: Toward Efficient Generation of Entangled Photons

P.R. Sharapova, S.S. Kruk, A.S. Solntsev, Laser & Photonics Reviews (2023).


Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates

J. De, X. Ma, F. Yin, J. Ren, J. Yao, S. Schumacher, Q. Liao, H. Fu, G. Malpuech, D. Solnyshkov, Journal of the American Chemical Society (JACS) 145 (2023) 1557–1563.


Temporal sorting of optical multi-wave-mixing processes in semiconductor quantum dots

T. Meier, S. Grisard, A.V. Trifonov, H. Rose, R. Reichhardt, M. Reichelt, C. Schneider, M. Kamp, S. Höfling, M. Bayer, I.A. Akimov, Arxiv:2302.02480 (2023).



Detector entanglement: Quasidistributions for Bell-state measurements

J. Sperling, I. Gianani, M. Barbieri, E. Agudelo, Physical Review A 107 (2023).


Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography

C. Lüders, M. Pukrop, F. Barkhausen, E. Rozas, C. Schneider, S. Höfling, J. Sperling, S. Schumacher, M. Aßmann, Physical Review Letters 130 (2023).


A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces

D. Hähnel, C. Golla, M. Albert, T. Zentgraf, V. Myroshnychenko, J. Förstner, C. Meier, Light: Science & Applications 12 (2023) 97.


Efficient Modeling and Tailoring of Nonlinear Wavefronts in Dielectric Metasurfaces

D. Hähnel, J. Förstner, V. Myroshnychenko, ACS Photonics (2023).


Theoretical analysis of four-wave mixing on semiconductor quantum dot ensembles with quantum light

H. Rose, S. Grisard, A.V. Trifonov, R. Reichhardt, M. Reichelt, M. Bayer, I.A. Akimov, T. Meier, in: Ultrafast Phenomena and Nanophotonics XXVII, SPIE, 2023.



Revealing the nonadiabatic tunneling dynamics in solid-state high harmonic generation

R. Zuo, X. Song, S. Ben, T. Meier, W. Yang, Physical Review Research 5 (2023).


Long-Lived Exciton Coherence in Mixed-Halide Perovskite Crystals

S. Grisard, A.V. Trifonov, I.A. Solovev, D.R. Yakovlev, O. Hordiichuk, M.V. Kovalenko, M. Bayer, I.A. Akimov, Nano Letters 23 (2023).


Tailoring the directive nature of optical waveguide antennas

H. Farheen, L.-Y. Yan, T. Leuteritz, S. Qiao, F. Spreyer, C. Schlickriede, V. Quiring, C. Eigner, C. Silberhorn, T. Zentgraf, S. Linden, V. Myroshnychenko, J. Förstner, in: S.M. García-Blanco, P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies XXVII, SPIE, 2023, p. 124241E.


Coherent Phonons in van der Waals MoSe2/WSe2 Heterobilayers

C. Li, A.V. Scherbakov, P. Soubelet, A.K. Samusev, C. Ruppert, N. Balakrishnan, V.E. Gusev, A.V. Stier, J.J. Finley, M. Bayer, A.V. Akimov, Nano Letters 23 (2023).


Valence band electronic structure of the van der Waals antiferromagnet FePS3

J.E. Nitschke, D.L. Esteras, M. Gutnikov, K. Schiller, S. Mañas-Valero, E. Coronado, M. Stupar, G. Zamborlini, S. Ponzoni, J.J. Baldoví, M. Cinchetti, Materials Today Electronics 6 (2023).


On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs

D. Bauch, D. Siebert, K.D. Jöns, J. Förstner, S. Schumacher, Advanced Quantum Technologies 7 (2023).


Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance

C. Eigner, L. Padberg, V. Quiring, A. Bocchini, M. Santandrea, U. Gerstmann, W.G. Schmidt, C. Silberhorn, in: CLEO 2023, Optica Publishing Group, 2023.


2022

Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber

M. Hammer, L. Ebers, J. Förstner, in: D.L. Andrews, E.J. Galvez, H. Rubinsztein-Dunlop (Eds.), Complex Light and Optical Forces XVI, SPIE, 2022, p. 120170F.


Light Scattering by Large Densely Packed Clusters of Particles

Y. Grynko, Y. Shkuratov, S. Alhaddad, J. Förstner, in: A. Kokhanovsky (Ed.), Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media, Springer International Publishing, Cham, 2022.


Third‐Order Susceptibility of Lithium Niobate: Influence of Polarons and Bipolarons

A.L. Kozub, U. Gerstmann, W.G. Schmidt, Physica Status Solidi (b) 260 (2022).


Optimization of optical waveguide antennas for directive emission of light

H. Farheen, T. Leuteritz, S. Linden, V. Myroshnychenko, J. Förstner, Journal of the Optical Society of America B 39 (2022) 83.



Broadband optical Ta2O5 antennas for directional emission of light

H. Farheen, L.-Y. Yan, V. Quiring, C. Eigner, T. Zentgraf, S. Linden, J. Förstner, V. Myroshnychenko, Optics Express 30 (2022) 19288.



Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses

S. Grisard, H. Rose, A.V. Trifonov, R. Reichhardt, D.E. Reiter, M. Reichelt, C. Schneider, M. Kamp, S. Höfling, M. Bayer, T. Meier, I.A. Akimov, Physical Review B 106 (2022).


Microscopic simulations of high harmonic generation from semiconductors

A. Trautmann, R. Zuo, G. Wang, W.-R. Hannes, S. Yang, L.H. Thong, C. Ngo, J. Steiner, M. Ciappina, M. Reichelt, H.T. Duc, X. Song, W. Yang, T. Meier, in: M. Betz, A.Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XXVI, 2022.


Coherent contributions to population dynamics in a semiconductor microcavity

J. Paul, H. Rose, E. Swagel, T. Meier, J.K. Wahlstrand, A.D. Bristow, Physical Review B 105 (2022).


Nonlinear down-conversion in a single quantum dot

B. Jonas, D.F. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K. Jöns, D. Reuter, S. Schumacher, A. Zrenner, Nature Communications 13 (2022).


Helical Polariton Lasing from Topological Valleys in an Organic Crystalline Microcavity

T. Long, X. Ma, J. Ren, F. Li, Q. Liao, S. Schumacher, G. Malpuech, D. Solnyshkov, H. Fu, Advanced Science 9 (2022).


Manipulating polariton condensates by Rashba-Dresselhaus coupling at room temperature

Y. Li, X. Ma, X. Zhai, M. Gao, H. Dai, S. Schumacher, T. Gao, Nature Communications 13 (2022).


Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton

T. Praschan, D. Heinze, D. Breddermann, A. Zrenner, A. Walther, S. Schumacher, Physical Review B 105 (2022).


Unidirectional vortex waveguides and multistable vortex pairs in polariton condensates

X. Gao, W. Hu, S. Schumacher, X. Ma, Optics Letters 47 (2022) 3235–3238.


Switching Off a Microcavity Polariton Condensate near the Exceptional Point

Y. Li, X. Ma, Z. Hatzopoulos, P.G. Savvidis, S. Schumacher, T. Gao, ACS Photonics 9 (2022) 2079–2086.


Nonlinear down-conversion in a single quantum dot

B. Jonas, D.F. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K. Jöns, D. Reuter, A. Zrenner, Nonlinear Down-Conversion in a Single Quantum Dot, LibreCat University, 2022.


Electron polarons in lithium niobate: Charge localization, lattice deformation, and optical response

F. Schmidt, A.L. Kozub, U. Gerstmann, W.G. Schmidt, A. Schindlmayr, in: G. Corradi, L. Kovács (Eds.), New Trends in Lithium Niobate: From Bulk to Nanocrystals, MDPI, Basel, 2022, pp. 231–248.


Bound polaron formation in lithium niobate from ab initio molecular dynamics

M. Krenz, U. Gerstmann, W.G. Schmidt, Applied Physics A 128 (2022) 480.


DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking

L. Padberg, V. Quiring, A. Bocchini, M. Santandrea, U. Gerstmann, W.G. Schmidt, C. Silberhorn, C. Eigner, Crystals 12 (2022) 1359.


Flexible source of correlated photons based on LNOI rib waveguides

L. Ebers, A. Ferreri, M. Hammer, M. Albert, C. Meier, J. Förstner, P.R. Sharapova, Journal of Physics: Photonics 4 (2022) 025001.


Small-scale online simulations in guided-wave photonics

M. Hammer, in: S.M. García-Blanco, P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies XXVI, SPIE, 2022, p. 1200414.


Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4

S. Neufeld, A. Schindlmayr, W.G. Schmidt, Journal of Physics: Materials 5 (2022).


Tilting nondispersive bands in an empty microcavity

Y. Gao, Y. Li, X. Ma, M. Gao, H. Dai, S. Schumacher, T. Gao, Applied Physics Letters 121 (2022).


Electron–Nuclear Coherent Coupling and Nuclear Spin Readout through Optically Polarized VB Spin States in hBN

F.F. Murzakhanov, G.V. Mamin, S.B. Orlinskii, U. Gerstmann, W.G. Schmidt, T. Biktagirov, I. Aharonovich, A. Gottscholl, A. Sperlich, V. Dyakonov, V.A. Soltamov, Nano Letters 22 (2022) 2718–2724.


Electrochemical performance of KTiOAsO_4 (KTA) in potassium-ion batteries from density-functional theory

A. Bocchini, U. Gerstmann, T. Bartley, H.-G. Steinrück, G. Henkel, W.G. Schmidt, Phys. Rev. Materials 6 (2022) 105401.


Oxygen vacancies in KTiOPO_4: Optical absorption from hybrid DFT

A. Bocchini, U. Gerstmann, W.G. Schmidt, Phys. Rev. B 105 (2022) 205118.


Driven Gaussian quantum walks

P. Held, M. Engelkemeier, S. De, S. Barkhofen, J. Sperling, C. Silberhorn, Physical Review A 105 (2022).


Coherent Phononics of van der Waals Layers on Nanogratings

A.V. Akimov, M. Barra-Burillo, M. Bayer, J. Bradford, V.E. Gusev, L.E. Hueso, A. Kent, S. Kukhtaruk, A. Nadzeyka, A. Patanè, A.W. Rushforth, A.V. Scherbakov, D.D. Yaremkevich, T.L. Linnik, Nano Letters 22 (2022).


Ultrafast All-Optical Polarization Switch Controlled by Optically Excited Picosecond Acoustic Perturbation of Exciton Resonance in Planar Microcavities

A.A. Demenev, D.D. Yaremkevich, A.V. Scherbakov, S.S. Gavrilov, D.R. Yakovlev, V.D. Kulakovskii, M. Bayer, Physical Review Applied 18 (2022).


A density-functional theory study of hole and defect-bound exciton polarons in lithium niobate

F. Schmidt, A.L. Kozub, U. Gerstmann, W.G. Schmidt, A. Schindlmayr, Crystals 12 (2022).


2021

Optical evidence of many-body effects in the zincblende Al$_\mathrm{x}$Ga$_\mathrm{1-x}$N alloy system

E. Baron, M. Feneberg, R. Goldhahn, M. Deppe, F. Tacken, D.J. As, Journal of Physics D: Applied Physics (2021).


Selective Etching of (111)B-Oriented AlxGa1−xAs-Layers for Epitaxial Lift-Off

T. Henksmeier, M. Eppinger, B. Reineke, T. Zentgraf, C. Meier, D. Reuter, Physica Status Solidi (A) 218 (2021) 2000408.


Optical in-situ temperature management for high-quality ZnO molecular beam epitaxy

M. Albert, C. Golla, C. Meier, Journal of Crystal Growth 557 (2021).


Nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays

J. Mundry, F. Spreyer, V. Jmerik, S. Ivanov, T. Zentgraf, M. Betz, Optical Materials Express 11 (2021).



Selective area growth of cubic gallium nitride on silicon (001) and 3C-silicon carbide (001)

F. Meier, M. Protte, E. Baron, M. Feneberg, R. Goldhahn, D. Reuter, D.J. As, AIP Advances (2021).


Nondegenerate two-photon absorption in ZnSe: Experiment and theory

L. Krauss-Kodytek, W.-R. Hannes, T. Meier, C. Ruppert, M. Betz, Nondegenerate Two-Photon Absorption in ZnSe: Experiment and Theory, LibreCat University, 2021.


Controlling the emission time of photon echoes by optical freezing of exciton dephasing and rephasing in quantum-dot ensembles

M. Reichelt, H. Rose, A.N. Kosarev, S.V. Poltavtsev, M. Bayer, I.A. Akimov, C. Schneider, M. Kamp, S. Höfling, T. Meier, Controlling the Emission Time of Photon Echoes by Optical Freezing of Exciton Dephasing and Rephasing in Quantum-Dot Ensembles, LibreCat University, 2021.


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