Attosecond electron microscopy by free-electron homodyne detection
- URL: http://arxiv.org/abs/2305.03005v1
- Date: Thu, 4 May 2023 17:23:37 GMT
- Title: Attosecond electron microscopy by free-electron homodyne detection
- Authors: John H. Gaida, Hugo Louren\c{c}o-Martins, Murat Sivis, Thomas
Rittmann, Armin Feist, F. Javier Garc\'ia de Abajo and Claus Ropers
- Abstract summary: Time-resolved electron microscopy aims at tracking nanoscale excitations and dynamic states of matter with a temporal resolution ultimately reaching the attosecond regime.
Here, we introduce Free-Electro-n Homodyne Detection (FREHD) as a universally applicable approach to electron microscopy phase-resolved optical responses at hightemporal resolution.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Time-resolved electron microscopy aims at tracking nanoscale excitations and
dynamic states of matter with a temporal resolution ultimately reaching the
attosecond regime. Periodically time-varying fields in an illuminated specimen
cause free-electron inelastic scattering, which enables the spectroscopic
imaging of near-field intensities. However, access to the evolution of
nanoscale fields and structures within the light cycle requires a sensitivity
to the optical phase. Here, we introduce Free-Electron Homodyne Detection
(FREHD) as a universally applicable approach to electron microscopy of
phase-resolved optical responses at high spatiotemporal resolution. In this
scheme, a phase-controlled reference interaction serves as the local oscillator
to extract arbitrary sample-induced modulations of a free-electron wave
function. We demonstrate this principle through the phase-resolved imaging of
plasmonic fields with few-nanometer spatial and sub-cycle temporal resolutions.
Due to its sensitivity to both phase- and amplitude-modulated electron beams,
FREHD measurements will be able to detect and amplify weak signals stemming
from a wide variety of microscopic origins, including linear and nonlinear
optical polarizations, atomic and molecular resonances and attosecond-modulated
structure factors.
Related papers
- Quantum control of ro-vibrational dynamics and application to
light-induced molecular chirality [39.58317527488534]
Achiral molecules can be made temporarily chiral by excitation with electric fields.
We go beyond the assumption of molecular orientations to remain fixed during the excitation process.
arXiv Detail & Related papers (2023-10-17T20:33:25Z) - Coherently amplified ultrafast imaging using a free-electron interferometer [0.5245057441560558]
Free-Electron Ramsey Imaging (IFER) is a microscopy approach based on light-induced electron modulation.
We provide time-, space-, and phase-resolved measurements of a micro-drum made from a hexagonal boron nitride membrane.
Our experiments show a 20-fold coherent amplification of the near-field signal compared to conventional electron near-field imaging.
arXiv Detail & Related papers (2023-05-08T17:20:30Z) - Solution-phase single-particle spectroscopy for probing multi-polaronic
dynamics in quantum emitters at femtosecond resolution [6.722815153728718]
We develop a solution-phase single-particle pump-probe spectroscopy with photon correlation detection that captures sample-averaged dynamics in single molecules and/or defect states with unprecedented clarity at femtosecond resolution.
Our work provides a framework for ultrafast spectroscopy in single emitters, molecules, or defects prone to photoluminescence intermittency and heterogeneity, opening new avenues of extreme-scale characterization and synthetic improvements for quantum information applications.
arXiv Detail & Related papers (2023-04-03T06:14:14Z) - Variable electro-optic shearing interferometry for ultrafast
single-photon-level pulse characterization [0.0]
We introduce a pulse characterisation scheme that maps the magnitude of its short-time Fourier transform.
Our method is based on introducing a series of controlled time and frequency shifts.
We successfully reconstructed the spectral phase and amplitude of a single-photon-level pulse.
arXiv Detail & Related papers (2022-07-28T12:45:08Z) - Tunable directional photon scattering from a pair of superconducting
qubits [105.54048699217668]
In the optical and microwave frequency ranges tunable directionality can be achieved by applying external magnetic fields.
We demonstrate tunable directional scattering with just two transmon qubits coupled to a transmission line.
arXiv Detail & Related papers (2022-05-06T15:21:44Z) - A full degree-of-freedom photonic crystal spatial light modulator [39.67745538418647]
Control of optical fields requires complete control of all degrees-of-freedom within a region of space and time.
Work opens a new regime of programmability at the fundamental limits of multimode optical control.
arXiv Detail & Related papers (2022-04-21T17:36:34Z) - Entangled Photons Enabled Time- and Frequency-Resolved Coherent Raman
Spectroscopy in Condensed Phase Molecules [1.115958674023625]
We develop an ultrafast frequency-resolved Raman spectroscopy with entangled photons for polyatomic molecules in condensed phases.
We develop a microscopic theory for this Raman spectroscopy, revealing the electronic coherence dynamics.
The heterodyne-detected Raman signal is further developed to capture the phases of electronic coherence and emission in real-time domain.
arXiv Detail & Related papers (2021-06-21T11:15:42Z) - Continuum-electron interferometry for enhancement of photoelectron
circular dichroism and measurement of bound, free, and mixed contributions to
chiral response [39.58317527488534]
We develop photoelectron interferometry based on laser-assisted extreme ultraviolet ionization for flexible and robust control of photoelectron circular dichroism in randomly oriented chiral molecules.
A comb of XUV photons ionizes a sample of chiral molecules in the presence of a time-delayed infrared or visible laser pulse promoting interferences between components of the XUV-ionized photoelectron wave packet.
arXiv Detail & Related papers (2021-04-15T15:20:57Z) - Position-controlled quantum emitters with reproducible emission
wavelength in hexagonal boron nitride [45.39825093917047]
Single photon emitters (SPEs) in low-dimensional layered materials have recently gained a large interest owing to the auspicious perspectives of integration and extreme miniaturization.
Here, we evidence SPEs in high purity synthetic hexagonal boron nitride (hBN) that can be activated by an electron beam at chosen locations.
Our findings constitute an essential step towards the realization of top-down integrated devices based on identical quantum emitters in 2D materials.
arXiv Detail & Related papers (2020-11-24T17:20:19Z) - Optical Excitations with Electron Beams: Challenges and Opportunities [0.0]
We provide an overview of photonics research based on free electrons, supplemented by original theoretical insights.
We show that the excitation probability by a single electron is independent of its wave function, apart from a classical average over the transverse beam density profile.
We conclude with perspectives on various exciting directions for disruptive approaches to non-invasive spectroscopy and microscopy.
arXiv Detail & Related papers (2020-10-26T12:08:32Z) - Hyperentanglement in structured quantum light [50.591267188664666]
Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols.
Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes.
We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
arXiv Detail & Related papers (2020-06-02T18:00:04Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.