Photoinduced Fano-resonance of coherent phonons in zinc

Abstract

Utilizing femtosecond optical pump-probe technique, we have studied transient Fano-resonance in zinc. At high excitation levels the Fourier spectrum of the coherent E${}_{2g}$ phonon exhibits strongly asymmetric line shape, which is well modeled by the Fano function. The Fano parameter (1/Q) was found to be strongly excitation fluence dependent while depending weakly on the initial lattice temperature. We attribute the origin of the Fano-resonance to the coupling of coherent phonon to the electronic continuum, with their transition probabilities strongly renormalized in the vicinity of the photoinduced structural transition.

arXiv comment5 pages, 3 figures, to be published in Physical Review B

References in corpus (1)

• Ultrafast dynamics of coherent optical phonons and nonequilibrium electrons in transition metals

Cited by in corpus (10)

• Fano resonances in nanoscale structures
• Coherent mixing of mechanical excitations in nano-optomechanical structures
• Polaronic conductivity in the photoinduced phase of 1T-TaS2
• Fano Interference at the Excitation of Coherent Phonons: Relation between the Asymmetry Parameter and the Initial Phase of Coherent Oscillations
• Coherent Control of Fano Resonances in a Macroscopic Four-Mirror Cavity
• Anomalous Fano Resonance in Double Quantum Dot System Coupled to Superconductor
• Polaronic-Quasiparticle Picture for Generation Dynamics of Coherent Phonons in Semiconductors: Transient and Non-Linear Fano Resonance
• Ultrafast asymmetric Rosen-Zener-like coherent phonon responses observed in silicon
• Irregular Oscillatory-Patterns in the Early-Time Region of Coherent Phonon Generation in Silicon
• Long-lived relaxation channel and exciton-phonon coupling in Ta2NiSe5 via non-degenerate pump-probe spectroscopy