H2020Индивидуална стипендия2021–2023

SEPhIM · Strong electron-photon interactions with high-Q microresonators

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2021-04-01 → 2023-03-31
Финансиране от ЕС: 191 149 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Взаимодействието между свободни електрони и светлина се изучава чрез използването на микрорезонатори върху фотонни чипове. Това позволява по-прецизен контрол и измерване на електронните лъчи, което помага за подобряване на изображенията в електронната микроскопия.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Strong electron-photon interactions with high-Q microresonators

Due to the short de Broglie wavelength and strong interaction with matter, free electrons are widely used to probe minute physical structures and local excitations. In particular, electron microscopes enable imaging, diffraction, and spectroscopy at an ultra-high spatial resolution, having revolutionized material science and structural biology. The interaction of free electrons with light, a fundamental and special type of light-matter interaction, has been exploited in exquisite control and measurement schemes for electron beams. The ultrafast transmission electron microscope (UTEM) provides time-resolved electron microscopy with femtosecond temporal resolution by using an electron-pump-optical-probe technique in a transmission electron microscope (TEM). In particular, photon-induced near-field electron microscopy in UTEM has been used to investigate electron-light interactions with a high spatiotemporal resolution, leading to the demonstration of quantum-coherent control of free electrons, attosecond electron pulse trains, and hyperspectral imaging of nanophotonic structures. Recently, there has been growing interest in investigating electron-light interactions mediated by dielectric photonic cavities. The project “Strong electron-photon interactions with high-Q microresonators” aimed at exploiting strong electron-photon interactions with photonic chip-based high-Q optical microresonators. In this project, we have demonstrated electron-photon interactions based on the combination of electron microscopy and integrated photonics. The cavity enhancement and electron-photon phase matching lead to an enhanced interaction strength, while photonic integrated circuits provide flexibility and compactness to tailor the interaction. This breakthrough has enabled continuous-beam electron phase modulation with continuous-wave optical fields, the generation of correlated electron-photon pairs, and free electron interaction with nonlinear optical states.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The main objective of the SEPhIM research action is the development and exploitation of strong electron-photon interactions with photonic-chip-based high-Q microresonators and photo-induced near-field electron microscopy (PINEM). This will be achieved using the ultra-high quality factor of integrated microresonators to enhance the coupling strength between free electrons and cavity photons in an ultrafast transmission electron microscope (UTEM). This project will bridge and separately advance the fields of integrated photonics, ultrafast electron microscopy, and quantum optics.By performing UTEM-PINEM, a multidimensional imaging and spectroscopy of the microresonators are available. The enhanced electron-photon interaction, mediated by the high Q-factor of the microresonators, will lead to a strong phase modulation of free electrons, a wide spectral broadening of the electron energy, and the measurement of cavity-photon lifetime. Moreover, using temporal dissipative solitons formed in the microresonators, time-gated electron-soliton interactions will also be investigated. Due to the strong spatiotemporal confinement of the soliton pulse, the electron-photon coupling will be further enhanced. Attosecond electron pulses in UTEM will enable time-domain electron microscopy of the soliton waveforms, while the concomitant generation of optical frequency combs will provide spectrally-resolved characterization of the electron-soliton interaction. Furthermore, strong coupling between free electrons and cavity photons will enable quantum state synthesis and entanglement generation. As a proof-of-concept demonstration, we intend to perform all-optical non-demolition detection of free electrons. The electron-photon interaction will be used to herald and register transmitted electrons, thus suppressing shot-noise in the electron beam. This will improve the signal-to-noise ratio and reduce radiation damage in electron imaging and spectroscopy techniques.

Оригинален текст от CORDIS (на английски).

Участници

ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE · LausanneКоординаторШвейцария