Publications (34)
Waveguide Resonator with Integrated Phase Modulator for Second Harmonic Generation
Michael Stefszky, Matteo Santandrea, Felix vom Bruch +6
We report second harmonic generation from a titanium indiffused lithium niobate waveguide resonator device whose cavity length is locked to the fundamental pump laser using an on-c…
A source of polarization-entangled photon pairs interfacing quantum memories with telecom photons
Christoph Clausen, Felix Bussieres, Alexey Tiranov +5
We present a source of polarization-entangled photon pairs suitable for the implementation of long-distance quantum communication protocols using quantum memories. Photon pairs wit…
Harnessing of temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes
Julian Brockmeier, Timon Schapeler, Nina Amelie Lange +4
Cointegration of heralded single-photon generation and on-chip detection requires the ability to differentiate between pump light and single photons. We explored the dispersion-ind…
Cryogenic second harmonic generation in periodically-poled lithium niobate waveguides
Moritz Bartnick, Matteo Santandrea, Jan Philipp Hoepker +7
Prospective integrated quantum optical technologies will combine nonlinear optics and components requiring cryogenic operating temperatures. Despite the prevalence of integrated pl…
Storage of hyperentanglement in a solid-state quantum memory
Alexey Tiranov, Jonathan Lavoie, Alban Ferrier +11
Two photons can simultaneously share entanglement between several degrees of freedom such as polarization, energy-time, spatial mode and orbital angular momentum. This resource is…
Two-color narrowband photon pair source with high brightness based on clustering in a monolithic waveguide resonator
Kai-Hong Luo, Harald Herrmann, Stephan Krapick +5
We report on an integrated non-degenerate narrowband photon pair source produced at 890 nm and 1320nm via type II parametric down-conversion in a periodically poled waveguide with…
The Role of Stickiness in the Rheology of Semiflexible Polymers
Tom Golde, Martin Glaser, Cary Tutmarc +7
Semiflexible polymers form central structures in biological material. Modeling approaches usually neglect influences of polymer-specific molecular features aiming to describe semif…
Fully guided and phase locked Ti:PPLN waveguide squeezing for applications in quantum sensing
Renato Domeneguetti, Michael Stefszky, Harald Herrmann +4
This work reports a fully guided setup for single-mode squeezing generation on integrated titanium-indiffused periodically poled nonlinear resonators. A continuous wave laser beam…
Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides
Nina Amelie Lange, Sebastian Lengeling, Philipp Mues +6
The titanium in-diffused lithium niobate waveguide platform is well-established for reliable prototyping and packaging of many quantum photonic components at room temperature. Neve…
Integrated transition edge sensors on lithium niobate waveguides
Jan Philipp Höpker, Thomas Gerrits, Adriana Lita +8
We show the proof-of-principle detection of light at 1550 nm coupled evanescently from a titanium in-diffused lithium niobate waveguide to a superconducting transition edge sensor.…
Lossy SU(1,1) interferometers in the single-photon-pair regime
Matteo Santandrea, Kai-Hong Luo, Michael Stefszky +3
The success of quantum technologies is intimately connected to the possibility of using them in real-world applications. To this aim, we study the sensing capabilities of quantum S…
Counter-propagating photon pair generation in a nonlinear waveguide
Kai-Hong Luo, Vahid Ansari, Marcello Massaro +5
Counter-propagating parametric conversion processes in non-linear bulk crystals have been shown to feature unique properties for efficient narrowband frequency conversion. In quant…
Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO and polymer technology
Christian KieÃler, Hauke Conradi, Moritz Kleinert +3
A reliable, but cost-effective generation of single-photon states is key for practical quantum communication systems. For real-world deployment, waveguide sources offer optimum com…
A versatile design for resonant guided-wave parametric down-conversion sources for quantum repeaters
Benjamin Brecht, Kai-Hong Luo, Harald Herrmann +1
Quantum repeaters - fundamental building blocks for long-distance quantum communication - are based on the interaction between photons and quantum memories. The photons must fulfil…
Towards integrated superconducting detectors on lithium niobate waveguides
Jan Philipp Höpker, Moritz Bartnick, Evan Meyer-Scott +15
Superconducting detectors are now well-established tools for low-light optics, and in particular quantum optics, boasting high-efficiency, fast response and low noise. Similarly, l…
On-chip generation of photon-triplet states
Stephan Krapick, Benjamin Brecht, Harald Herrmann +2
Efficient sources of many-partite non-classical states are key for the advancement of quantum technologies and for the fundamental testing of quantum mechanics. We demonstrate the…
Cryogenic electro-optic modulation in titanium in-diffused lithium niobate waveguides
Frederik Thiele, Felix vom Bruch, Julian Brockmeier +9
Lithium niobate is a promising platform for integrated quantum optics. In this platform we aim to efficiently manipulate and detect quantum states by combining superconducting sing…
A two-channel, spectrally degenerate polarization entangled source on chip
Linda Sansoni, Kai Hong Luo, Christof Eigner +4
Integrated optics provides the platform for the experimental implementation of highly complex and compact circuits for quantum information applications. In this context integrated…
Direct generation of genuine single-longitudinal-mode narrowband photon pairs
Kai-Hong Luo, Harald Herrmann, Stephan Krapick +6
The practical prospect of quantum communication and information processing relies on sophisticated single photon pairs which feature controllable waveform, narrow spectrum, excelle…
An Efficient Integrated Two-Color Source for Heralded Single Photons
Stephan Krapick, Harald Herrmann, Viktor Quiring +3
We present a pulsed and integrated, highly non-degenerate parametric downconversion (PDC) source of heralded single photons at telecom wavelengths, paired with heralding photons ar…
Comparison of nanomechanical properties of in vivo and in vitro keratin 8/18 networks
Tobias Paust, Anke Leitner, Ulla Nolte +3
In our work we compare the mechanical properties of the extracted keratin cytoskeleton of pancreatic carcinoma cells with the mechanical properties of in vitro assembled keratin 8/…
Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory
Felix Bussieres, Christoph Clausen, Alexey Tiranov +11
In quantum teleportation, the state of a single quantum system is disembodied into classical information and purely quantum correlations, to be later reconstructed onto a second sy…
Cryogenic Electro-Optic Polarisation Conversion in Titanium in-diffused Lithium Niobate Waveguides
Frederik Thiele, Felix vom Bruch, Victor Quiring +5
Many technologies in quantum photonics require cryogenic conditions to operate. However, the underlying platform behind active components such as switches, modulators and phase shi…
Limits on the heralding efficiencies and spectral purities of spectrally-filtered single photons from photon pair sources
Evan Meyer-Scott, Nicola Montaut, Johannes Tiedau +4
Photon pairs produced by parametric down-conversion or four-wave mixing can interfere with each other in multiport interferometers, or carry entanglement between distant nodes for…
High efficiency 'plug & play' source of heralded single photons
Nicola Montaut, Linda Sansoni, Evan Meyer-Scott +4
Reliable generation of single photons is of key importance for fundamental physical experiments and to demonstrate quantum technologies. Waveguide-based photon pair sources have sh…
Spectrally multimode integrated SU(1,1) interferometer
Alessandro Ferreri, Matteo Santandrea, Michael Stefszky +4
Nonlinear SU(1,1) interferometers are fruitful and promising tools for spectral engineering and precise measurements with phase sensitivity below the classical bound. Such interfer…
Metasurface interferometry towards quantum sensors
Philip Georgi, Marcello Massaro, Kai-Hong Luo +7
Optical metasurfaces open new avenues for precise wavefront control of light for integrated quantum technology. Here, we demonstrate a hybrid integrated quantum photonic system tha…
Nonlinear integrated quantum electro-optic circuits
Kai-Hong Luo, Sebastian Brauner, Christof Eigner +5
Future quantum computation and networks require scalable monolithic circuits, which incorporate various advanced functionalities on a single physical substrate. Although substantia…
Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler
Silia Babel, Laura Bollmers, Marcello Massaro +9
Interference between single photons is key for many quantum optics experiments and applications in quantum technologies, such as quantum communication or computation. It is advanta…
Two-photon phase-sensing with single-photon detection
Panagiotis Vergyris, Charles Babin, Raphael Nold +6
Path-entangled multi-photon states allow optical phase-sensing beyond the shot-noise limit, provided that an efficient parity measurement can be implemented. Realising this experim…
Engineering integrated pure narrow-band photon sources
Enrico Pomarico, Bruno Sanguinetti, Clara I. Osorio +2
Engineering and controlling well defined states of light for quantum information applications is of increasing importance as the complexity of quantum systems grows. For example, i…
Pyroelectric Influence on Lithium Niobate During the Thermal Transition for Cryogenic Integrated Photonics
Frederik Thiele, Thomas Hummel, Nina Amelie Lange +8
Lithium niobate has emerged as a promising platform for integrated quantum optics, enabling efficient generation, manipulation, and detection of quantum states of light. However, i…
A ultrabright, two-colour photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths
Silia Babel, Laura Bollmers, Franz Roeder +9
We present the design and characterisation of a guided-wave, bright and highly frequency non-degenerate parametric down-conversion source in thin-film lithium niobate. The source g…
Post-selection free, integrated optical source of non-degenerate, polarization entangled photon pairs
Harald Herrmann, Xu Yang, Abu Thomas +3
We present an integrated source of polarization entangled photon pairs in the telecom regime, which is based on type II-phasematched parametric down-conversion (PDC) in a Ti-indiff…