Publications de Yujia Yang | EPFL Graph Search

Probing the Formation of Nonlinear Optical States with Free Electrons

Tobias Kippenberg, Rui Ning Wang, Aleksandr Tusnin, Zheru Qiu, Yujia Yang, Arslan Sajid Raja, Guanhao Huang, Alexey Tikan

Combining nonlinear integrated photonics with electron microscopy, we probe the formation of optical dissipative structures in Si3N4 microresonators with free electrons and find unique spectral fingerprints in the electron spectrum that enable new electron ...

Institute of Electrical and Electronics Engineers Inc.2024

Coupling Free Electrons and Cavity Photons in a Transmission Electron Microscope

Tobias Kippenberg, Rui Ning Wang, Zheru Qiu, Yujia Yang, Junqiu Liu, Arslan Sajid Raja, Guanhao Huang

We couple free electrons to the optical modes of a photonic microring resonator. Inelastic electron scattering leads to the generation of cavity photons, correlated to the electrons in time and energy loss. ...

Institute of Electrical and Electronics Engineers Inc.2024

Unifying Optical Frequency Metrology with Free-Electron Spectroscopy

Tobias Kippenberg, Fabrizio Carbone, Rui Ning Wang, Alexey Sapozhnik, Yujia Yang, Thomas La Grange, Arslan Sajid Raja

We establish a frequency link across the microwave, optical, and free-electron domains by a photonic chip-based electron phase modulator driven by a continuous-wave laser locked to a fully stabilized optical frequency comb. ...

Institute of Electrical and Electronics Engineers Inc.2024

Free-electron interaction with nonlinear optical states in microresonators

Tobias Kippenberg, Rui Ning Wang, Aleksandr Tusnin, Zheru Qiu, Yujia Yang, Arslan Sajid Raja, Guanhao Huang, Alexey Tikan

The short de Broglie wavelength and strong interaction empower free electrons to probe structures and excitations in materials and biomolecules. Recently, electron-photon interactions have enabled new optical manipulation schemes for electron beams. In thi ...

American Association for the Advancement of Science2024

Photon Fock State Generation in Photonic Microresonators

Tobias Kippenberg, Zheru Qiu, Yujia Yang, Junqiu Liu, Arslan Sajid Raja, Guanhao Huang

We generate correlated pairs of free electrons and cavity photons by sending an electron beam across a photonic microresonator and filtering temporal coincidences. We further characterize the pairs analogue to a heralded single photon source. ...

Optical Society of America2023

Free Electron Interaction with Nonlinear Optical States

Tobias Kippenberg, Rui Ning Wang, Aleksandr Tusnin, Zheru Qiu, Yujia Yang, Arslan Sajid Raja, Guanhao Huang, Alexey Tikan

We couple free electrons with nonlinear optical states and frequency combs in photonic chip-based microresonators. Intracavity nonlinear dissipative structures including optical solitons imprint unique fingerprints in electron spectra and their Ramsey inte ...

Optical Society of America2023

Electron spectrometer calibration method

Tobias Kippenberg, Fabrizio Carbone, Alexey Sapozhnik, Yujia Yang, Thomas La Grange, Arslan Sajid Raja

The present invention concerns an energy dispersion calibration method for calibrating an electron spectrometer of an electron spectrometer system including at least one electron emission source, electron optics and the electron spectrometer. The method co ...

2023

Electron Emission Regimes of Planar Nano Vacuum Emitters

Yujia Yang, Alberto Nardi, Marco Turchetti

Recent advancements in nanofabrication have enabled the creation of vacuum electronic devices with nanoscale free-space gaps. These nanoelectronic devices promise the benefits of cold-field emission and transport through free space, such as high nonlineari ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Cavity-mediated electron-photon pairs

Tobias Kippenberg, Rui Ning Wang, Zheru Qiu, Yujia Yang, Junqiu Liu, Arslan Sajid Raja, Guanhao Huang

Quantum information, communication, and sensing rely on the generation and control of quantum correlations in complementary degrees of freedom. Free electrons coupled to photonics promise novel hybrid quantum technologies, although single-particle correlat ...

American Association for the Advancement of Science2022

PHz Electronic Device Design and Simulation for Waveguide-Integrated Carrier-Envelope Phase Detection

Yujia Yang

Carrier-envelope phase (CEP) detection of ultrashort optical pulses and low-energy waveform field sampling have recently been demonstrated using direct time-domain methods that exploit optical-field photoemission from plasmonic nanoantennas. These devices ...

IEEE Institute of Electrical and Electronics Engineers2022