Spectral control of high order harmonics through non-linear propagation effects

Abstract

High harmonic generation (HHG) in crystals has revealed a wealth of perspectives such as all-optical mapping of the electronic band structure, ultrafast quantum information and the creation of novel all-solid-state attosecond sources. Significant efforts have been made to understand the microscopic aspects of HHG in crystals, whereas the macroscopic effects, such as non-linear propagation effects of the driving pulse inside the dense solid media and its impact on the HHG process is often overlooked. In this work, we study macroscopic effects by comparing two materials with distinct optical properties, silicon (Si) and zinc oxide (ZnO). By scanning the focal position of 85 fs, 2.123 $\mu$m wavelength pulses inside the crystals (Z-scan) we reveal spectral shifts in the generated harmonics. We interpret the overall blueshift of the emitted harmonic spectrum as an imprint of the driving field spectral modulation occurring during the propagation inside the crystal. This is supported with numerical simulations. This study demonstrates that through manipulation of the fundamental driving field through non-linear propagation effects, precise control of the emitted HHG spectrum in solids can be realised. This method could offer a robust way to tailor HHG spectra for a range of spectroscopic applications.

arXiv comment6 pages,6 figures

References in corpus (15)

• Sub-cycle control of terahertz high-harmonic generation by dynamical Bloch oscillations
• Real-time observation of interfering crystal electrons in high-harmonic generation
• Impact of the electronic band structure in high-harmonic generation spectra of solids
• High-harmonic generation in amorphous solids
• Ab-initio multi-scale simulation of high-harmonic generation in solids
• Strong-Field Perspective on High-Harmonic Radiation from Bulk Solids
• The Effect of Multiple Conduction Bands on High Harmonic Emission from Dielectrics
• Multi-level perspective on high-order harmonic generation in solids
• Strong-field physics in three-dimensional topological insulators
• Orbital angular momentum from semiconductor high-order harmonics
• Attosecond synchronization of extreme ultraviolet high harmonics from crystals
• Nonadiabatic high-order harmonic generation from solids
• Determining the optimum thickness for high harmonic generation from nanoscale thin films: an ab initio computational study
• Spectral control of high order harmonics through non-linear propagation effects
• First-principles study of ultrafast and nonlinear optical properties of graphite thin films

Cited by in corpus (5)

• Signatures of multi-band effects in high-harmonic generation in monolayer MoS${}_2$
• Spectral control of high order harmonics through non-linear propagation effects
• Propagation effects in high-harmonic generation from dielectric thin films
• Polarization Spectroscopy of High-Order Harmonic Generation in Gallium Arsenide
• Non-linear propagation effects of intense femtosecond pulses on low order harmonics in solids