XUV/X-ray Multidimensional Spectroscopy of Fundamental Electron Dynamics and Impulsive Control of X-ray Light

Objetivo

"Interaction of extreme&controlled light fields with matter is driving an ongoing revolution in our understanding of quantum physics. Controlled—pulsed—visible lasers have enabled time-dependent two-dimensional (2D) spectroscopy currently transforming chemistry, and led to key milestones such as frequency combs.

Despite progress on coherent soft- and hard-x-ray pulsed sources during the last 10 years—e.g. x-ray free-electron lasers (FELs) or high-harmonic generation of laser light, nonlinear (e.g. 2D) spectroscopy or phase control of x-ray light remained a major challenge.

Here, I propose to experimentally realize
- (a) x-ray two- and multi-dimensional spectroscopy
- (b) resonant gain without inversion and spectral control of x rays
for the scientific goals
- (a) time- and quantum-state-resolved measurement of fundamental few- and many-electron dynamics
- (b) generation of soft-(electronic) and hard-x-ray (nuclear) frequency combs

For (a), a 4-quadrant x-ray time-delay unit will generate coherently-timed pulses out of one spatially coherent beam. For (b) a new physical mechanism relating Fano to Lorentz resonances and absorption to gain by a single temporal phase will be harvested.
Scientific impact:
(a): Site-specific 2D-x-ray spectroscopy will phase-sensitively test&promote theory and allow to understand fundamental processes: excitation, ionization, and few-electron dynamics in atoms and molecular bonding orbitals.
(b): Impulsive phase control of resonant gain and absorption represents a disruptive key technology rivalling the LASER especially in the hard-x-ray domain, where long-lived population inversion in dense media seems impossible. Frequency combs around a well-defined (5 neV) hard-x-ray Mössbauer Fe57 nuclear transition (14.4 keV) will be demonstrated. Such combs (at >10 keV), will in the future allow the most sensitive tests of fundamental physics, e.g. quantum-electrodynamics (QED) in highly-charged ions and the variation of physical 'constants'."

Ámbito científico

Régimen de financiación

ERC-CG - ERC Consolidator Grants

Institución de acogida

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV

Aportación de la UE

€ 1 983 863,00

Dirección

HOFGARTENSTRASSE 8
80539 Munchen
Alemania

Región

Bayern Oberbayern München, Kreisfreie Stadt

Tipo de actividad

Research Organisations

Contacto administrativo

Günter Sparn (Dr.)

Investigador principal

Thomas Pfeifer (Dr.)

Enlaces

Contactar con la organización Sitio web

Coste total

Sin datos

Beneficiarios (1)