Coherent Interaction Between Free Electrons and a Photonic Cavity
Kangpeng Wang,Raphael Dahan,Michael Shentcis,Yaron Kauffmann,Adi Ben Hayun,Ori Reinhardt,Shai Tsesses,Ido Kaminer +7 more
TLDR
In this paper, a platform for multidimensional nanoscale imaging and spectroscopy of free-electron interactions with photonic cavities was developed for low-dose, ultrafast electron microscopy of soft matter or other beam-sensitive materials.Abstract:
Advances in the research of interactions between ultrafast free electrons and light have introduced a previously unknown kind of quantum matter, quantum free-electron wavepackets1-5. So far, studies of the interactions of cavity-confined light with quantum matter have focused on bound electron systems, such as atoms, quantum dots and quantum circuits, which are considerably limited by their fixed energy states, spectral range and selection rules. By contrast, quantum free-electron wavepackets have no such limits, but so far no experiment has shown the influence of a photonic cavity on quantum free-electron wavepackets. Here we develop a platform for multidimensional nanoscale imaging and spectroscopy of free-electron interactions with photonic cavities. We directly measure the cavity-photon lifetime via a coherent free-electron probe and observe an enhancement of more than an order of magnitude in the interaction strength relative to previous experiments of electron-photon interactions. Our free-electron probe resolves the spatiotemporal and energy-momentum information of the interaction. The quantum nature of the electrons is verified by spatially mapping Rabi oscillations of the electron spectrum. The interactions between free electrons and cavity photons could enable low-dose, ultrafast electron microscopy of soft matter or other beam-sensitive materials. Such interactions may also open paths towards using free electrons for quantum information processing and quantum sensing. Future studies could achieve free-electron strong coupling6,7, photon quantum state synthesis8 and quantum nonlinear phenomena such as cavity electro-optomechanics9.read more
Citations
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Light–matter interactions with photonic quasiparticles
Nicholas Rivera,Ido Kaminer +1 more
TL;DR: In this paper, the authors focus on the theoretical and experimental developments in realizing new light-matter interactions with photonic quasiparticles, such as room-temperature strong coupling, ultrafast ‘forbidden’ transitions in atoms and new applications of the Cherenkov effect.
Journal ArticleDOI
Controlling free electrons with optical whispering-gallery modes
Ofer Kfir,Hugo Lourenço-Martins,Gero Storeck,Murat Sivis,Tyler R. Harvey,Tobias J. Kippenberg,Armin Feist,Claus Ropers,Claus Ropers +8 more
TL;DR: In this paper, the authors couple a free-electron beam to a travelling-wave resonant cavity mode, which induces a strong phase modulation on co-propagating electrons, leading to a spectral broadening of 700 electronvolts, corresponding to the absorption and emission of hundreds of photons.
Journal ArticleDOI
Resonant phase-matching between a light wave and a free-electron wavefunction
Raphael Dahan,Saar Nehemia,Michael Shentcis,Ori Reinhardt,Yuval Adiv,Xihang Shi,Orr Be’er,Morgan H. Lynch,Yaniv Kurman,Kangpeng Wang,Ido Kaminer +10 more
TL;DR: In this article, an energy-momentum phase-matching with the extended propagating light field was shown to enable strong interactions between free electrons and light waves, which is a type of inverse-Cherenkov interaction that occurs with a quantum electron wave function.
Journal ArticleDOI
Optical Excitations with Electron Beams: Challenges and Opportunities
TL;DR: Free electron beams such as those employed in electron microscopes have evolved into powerful tools to investigate photonic nanostructures with an unrivaled combination of spatial and spectral preciseness as discussed by the authors.
Journal ArticleDOI
Imprinting the quantum statistics of photons on free electrons.
Raphael Dahan,Raphael Dahan,Alexey Gorlach,Alexey Gorlach,Urs Haeusler,Urs Haeusler,Aviv Karnieli,Aviv Karnieli,Ori Eyal,Ori Eyal,Peyman Yousefi,Peyman Yousefi,Mordechai Segev,Ady Arie,Ady Arie,Gadi Eisenstein,Gadi Eisenstein,Peter Hommelhoff,Ido Kaminer,Ido Kaminer +19 more
TL;DR: In this paper, the quantum statistics effects of photons on free-electron-light interactions are observed, revealing a transition from quantum walk to classical random walk on the freeelectron energy ladder, and the electron walker serves as the probe in non-destructive quantum detection, measuring the second order photon-correlation g (2)(0) and higher order g ( n )(0).
References
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