A5064475135- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Advanced Electron Microscopy Techniques and Applications
- Quantum Information and Cryptography
- Laser-Matter Interactions and Applications
- Near-Field Optical Microscopy
- Electron and X-Ray Spectroscopy Techniques
- Quantum optics and atomic interactions
- Advanced Fluorescence Microscopy Techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Photonic Crystals and Applications
- Quantum Mechanics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Laser Design and Applications
- Nonlinear Optical Materials Studies
- Spectroscopy and Quantum Chemical Studies
- Advanced Optical Sensing Technologies
- Advanced X-ray Imaging Techniques
- Advanced Photonic Communication Systems
- Force Microscopy Techniques and Applications
- Plasmonic and Surface Plasmon Research
- Silicon Nanostructures and Photoluminescence
University of Göttingen
2019-2025
Max Planck Institute for Multidisciplinary Sciences
2022-2025
Max Planck Institute for Dynamics and Self-Organization
2023-2024
Max Planck Institute for Biophysical Chemistry
2022
Institute of Photonic Sciences
2021
Institució Catalana de Recerca i Estudis Avançats
2021
Lawrence Berkeley National Laboratory
2021
Intelligent Transport Systems Niedersachsen
2020
Abstract Integrated photonics facilitates extensive control over fundamental light–matter interactions in manifold quantum systems including atoms 1 , trapped ions 2,3 dots 4 and defect centres 5 . Ultrafast electron microscopy has recently made free-electron beams the subject of laser-based manipulation characterization 6–11 enabling observation walks 12–14 attosecond pulses 10,15–17 holographic electromagnetic imaging 18 Chip-based 19,20 promises unique applications nanoscale sensing but...
Advancing quantum information, communication and sensing relies on the generation control of correlations in complementary degrees freedom. Here, we demonstrate preparation electron-photon pair states using phase-matched interaction free electrons with evanescent vacuum field a photonic-chip-based optical microresonator. Spontaneous inelastic scattering produces intracavity photons coincident energy-shifted electrons. Harnessing these pairs for correlation-enhanced imaging, achieve...
The short de Broglie wavelength and strong interaction empower free electrons to probe structures excitations in materials biomolecules. Recently, electron-photon interactions have enabled new optical manipulation schemes for electron beams. In this work, we demonstrate the of with nonlinear states inside a photonic chip–based microresonator. Optical parametric processes give rise spatiotemporal pattern formation corresponding coherent or incoherent frequency combs. We couple such...
We propose a tangible experimental scheme for demonstrating quantum entanglement between swift electrons and light, relying on coherent cathodoluminescence photon generation in transmission electron microscope, eraser setup formation verification of entanglement. The free with light is key to developing free-electron optics its potential applications such as sensing, novel photonic state generation, electrons. Published by the American Physical Society 2025
Circular dichroism spectroscopy is an essential technique for understanding molecular structure and magnetic materials, but spatial resolution limited by the wavelength of light, sensitivity sufficient single-molecule challenging. We demonstrate that electrons can efficiently measure interaction between circularly polarized light chiral materials with deeply sub-wavelength resolution. By scanning a nanometer-sized focused electron beam across optically-excited nanostructure measuring energy...
To demonstrate the robustness of electron near-field circular dichroism, recorded and linear dichroism measurements on a wide array FIB-milled spirals with both 400 nm 800 pitch varying through-hole diameters.The data consistently show positive for left-handed negative right-handed (Fig. S1).For spirals, we see S2).
Nonlinear optical dynamics are of high importance in modern integrated photonics applications from laser amplifiers and modulators to quantum optics. Probing properties with spatial resolution is possible ultrafast transmission electron microscopy (UTEM) [1], [2], harnessing the inelastic scattering free electrons light. Combining microresonators TEM thereby boosts underlying electron-light interaction [3], fostering exploration optics [4], [5] as well a probing nonlinear effects inherent...
We propose a tangible experimental scheme for demonstrating quantum entanglement between swift electrons and light, relying on coherent cathodoluminescence photon generation in transmission electron microscope, eraser setup formation verification of entanglement. The free with light is key to developing free-electron optics its potential applications such as sensing, novel photonic state generation, electrons.
In this talk, we establish chip-based integrated silicon nitride photonics as a platform for experiments on the interactions between free electrons and light. Placing fibre-coupled microresonators in transmission electron microscope, observe quantised loss of energy passing waveguide an aloof geometry inelastically scattering off initially empty cavity modes while generating photons. Coincidence measurements performed both particles reveal common origin these correlated electron-photon...
Combining nonlinear integrated photonics with electron microscopy, we probe the formation of optical dissipative structures in Si3N4 microresonators free electrons and find unique spectral fingerprints spectrum that enable new beam modulation schemes.
We couple free electrons to the optical modes of a photonic microring resonator. Inelastic electron scattering leads generation cavity photons, correlated in time and energy loss.
Free electrons are a widespread and universal source of electromagnetic fields. The past decades witnessed ever-growing control over many aspects electron-generated radiation, from the incoherent emission produced by X-ray tubes to exceptional brilliance free-electron lasers. Reduced elementary process quantized energy exchange between individual field, electron beams may facilitate future sources tunable quantum light. However, features such radiation tied correlation particles, calling for...
Advancing quantum information and communication requires the control of correlations in complementary degrees freedom. In this work, we generate electron-photon pair states via inelastic scattering free electrons at a high-Q photonic-chip-based microresonator. analogy to spontaneous parametric down-conversion, time- energy-resolved detection both particles enables various heralding schemes. We experimentally characterize new heralded source single photons electrons. Ultimately, these results...
Here we establish a platform for efficient electron-photon pair generation by integrating photonic chip-based silicon nitride microresonator into transmission electron microscope. The free electrons passing the resonator scatter inelastically with empty optical modes, leading to quantized electron-energy loss as well of cavity photons. temporal correlation their detection demonstrates pairs. Selection these pairs allows further analysis process, usage high-fidelity single-photon or...
Journal Article Mapping Nonlinear Optical Effects in an Integrated Photonics Microresonator Get access Jan-Wilke Henke, Henke Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany4th Physical Institute, University of Germany Search other works by this author on: Oxford Academic Google Scholar Yujia Yang, Yang Physics, Swiss Federal Technology (EPFL), Lausanne, SwitzerlandCenter Quantum Science and Engineering, Switzerland F Jasmin Kappert, Kappert Arslan S Raja, Raja...
The short de Broglie wavelength and strong interaction empower free electrons to probe scattering excitations in materials resolve the structure of biomolecules. Recent advances using nanophotonic structures mediate bilinear electron-photon have brought novel optical manipulation schemes electron beams, enabling high space-time-energy resolution microscopy, quantum-coherent modulation, attosecond metrology pulse generation, transverse wavefront shaping, dielectric laser acceleration, pair...
We couple free electrons with nonlinear optical states and frequency combs in photonic chip-based microresonators. Intracavity dissipative structures including solitons imprint unique fingerprints electron spectra their Ramsey interference patterns.
The coupling of free electrons to confined optical modes enables the nanoscale mapping near- fields via spontaneous or stimulated inelastic electron-light scattering [1] as well modulation electron beams by highly populated coherent states [2]. unique combination integrated photonics with microscopy facilitated a significant boost underlying interaction strength through resonant enhancement velocity phase matching [3]. However, pushing single electron-single photon regime and demonstrating...
We generate correlated pairs of free electrons and cavity photons by sending an electron beam across a photonic microresonator filtering temporal coincidences. further characterize the analogue to heralded single photon source.