Measuring the photoelectron emission delay in the molecular frame

Abstract

If matter absorbs a photon of sufficient energy it emits an electron. The question of the duration of the emission process has intrigued scientists for decades. With the advent of attosecond metrology, experiments addressing such ultrashort intervals became possible. While these types of studies require attosecond experimental precision, we present here a novel measurement approach that avoids those experimental difficulties. We instead extract the emission delay from the interference pattern generated as the emitted photoelectron is diffracted by the parent ion's potential. Targeting core electrons in CO, we measured a 2d map of photoelectron emission delays in the molecular frame over a wide range of electron energies. The measured emission times depend drastically on the emission direction and exhibit characteristic changes along the shape resonance of the molecule. Our approach can be routinely extended to other electron orbitals and more complex molecules.

References in corpus (3)

• Attosecond-resolved photoionization of chiral molecules
• Measuring the photoelectron emission delay in the molecular frame
• Time delay in XUV/IR photoionization of H${}_2$O

Cited by in corpus (8)

• Measuring the photoelectron emission delay in the molecular frame
• Attosecond Ionization Time Delays in Strong-Field Physics
• Angular dependence of the Wigner time delay upon strong field ionization from an aligned p-orbital
• Superuniversal Statistics of Complex Time-Delays in Non-Hermitian Scattering Systems
• Shape resonances in photoionization cross sections and time delay
• Time delays in anisotropic systems
• A multiple scattering theoretical approach to time delay in high energy core-level photoemission of heteronuclear diatomic molecules
• Tracking Adiabaticity in Non-Equilibrium Many-Body Systems: The Hard Case of the X-ray Photoemission in Metals