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O: Fachverband Oberflächenphysik

O 14: Plasmonics and Nanooptics II: Light-Matter Interaction and Spectroscopy

O 14.2: Talk

Monday, March 18, 2024, 15:15–15:30, MA 042

Soliton Formation Dynamics in a Microresonator Probed by Electron Energy Gain Spectroscopy — •F. Jasmin Kappert¹, Yujia Yang², Jan-Wilke Henke¹, Arslan S. Raja², Germaine Arend¹, Guanhao Huang², Armin Feist¹, Zheru Qiu², Rui Ning Wang², Aleksandr Tusnin², Alexey Tikan², Tobias J. Kippenberg², and Claus Ropers¹ — ¹Max Planck Institute for Multidisciplinary Sciences, Göttingen,Germany — ²Institute of Physics, Swiss Federal Institute of TechnologyLausanne (EPFL), Switzerland

Ultrafast electron microscopes provide a powerful platform for investigating confined optical modes with high temporal and spatial resolution. Recently, integrated photonics has boosted the interaction strength of light with free electrons, enabling nanoscale spectroscopy of optical states with a continuous electron beam.

Here, we use continuous-beam electron energy gain spectroscopy (EEGS) to probe nonlinear optical excitations inside a microresonator [1]. Starting from single-color excitation, increasing the optical input power leads to the formation of dissipative Kerr solitons via various nonlinear comb states, evident in characteristic optical and EEG spectra. This scheme enables non-invasive probing of nonlinear optical dynamics with direct access to the intracavity field. Moreover, the interaction with solitons facilitates high-frequency spatiotemporal electron beam modulation.

[1] Y. Yang, et al., arXiv:2307.12142 (2023)

Keywords: solitons; nonlinear optics; electron microscopy; nanooptics; integrated photonics