Impact of the electronic band structure in high-harmonic generation spectra of solids

Physical Review Letters 118, 087403 (2017)

Impact of the electronic band structure in high-harmonic generation spectra of solids

Nicolas Tancogne-Dejean, Oliver D. Mücke, Franz X. Kärtner, Angel Rubio

An accurate analytic model describing high-harmonic generation (HHG) in solids is derived. Extensive first-princ ples simulations within a time-dependent density-functional framework corroborate the conclusions of the model. Our results reveal that: (i) the emitted HHG spectra are highly anisotropic and laser-polarization dependent even for cubic crystals, (ii) the harmonic emission is enhanced by the inhomogeneity of the electron-nuclei potential, the yield is increased for heavier atoms, and (iii) the cutoff photon energy is driver-wavelength independent. Moreover, we show that it is possible to predict the laser polarization for optimal HHG in bulk crystals solely from the knowledge of their electronic band structure. Our results pave the way to better control and optimize HHG in solids by engineering their band structure.

Additional Information

Download
Preprint - 724.06 KB
Doi
http://dx.doi.org/ 10.1103/PhysRevLett.118.087403
Notes
We acknowledge financial support from the European Research Council (ERC-2015-AdG-694097), COST Action MP1306 (EUSpec). N.T.-D. and A.R. would like to thank K.-M. Lee, S.A. Sato and T.J.-Y. Derrien for helpful discussions. F.X.K. and O.D.M. acknowledge support by the excellence cluster ’The Hamburg Centre of Ultrafast Imaging-Structure, Dynamics and Control of Matter at the Atomic Scale’ and the priority program QUTIF (SPP1840 SOLSTICE) of the Deutsche Forschungsgemeinschaft.

Related Projects

Related Research Areas