Abstract
High harmonic generation and enhancement by tuning the interlayer separation in two-dimensional van der Waals heterostructures are investigated.
Highlights
Since the discovery of graphene, various two-dimensional (2D) materials have been intensively investigated due to their exceptional properties and great potential for many applications
High harmonic generation (HHG) in 2D materials has attracted much attention, alongside the emergence of the new research frontier of HHG in solids,[4,5] which is of great importance for the exploration of strong-field physics in condensed matter systems[6,7,8,9,10,11] and for the development of novel ultrafast optoelectronic and photonic applications.[12,13,14,15,16]
We report HHG in bilayer van der Waals heterostructures combining graphene and hexagonal boron nitride (hBN) (G/hBN) monolayers[38] using ab initio simulations based on the framework of real-time time-dependent density-functional theory (TDDFT).[40,41,42]
Summary
Since the discovery of graphene, various two-dimensional (2D) materials have been intensively investigated due to their exceptional properties and great potential for many applications. High harmonic generation (HHG) in 2D materials has attracted much attention, alongside the emergence of the new research frontier of HHG in solids,[4,5] which is of great importance for the exploration of strong-field physics in condensed matter systems[6,7,8,9,10,11] and for the development of novel ultrafast optoelectronic and photonic applications.[12,13,14,15,16] HHG in graphene,[17,18,19,20,21,22,23,24,25,26,27,28] silicene,[29] black phosphorous,[30] transition metal dichalcogenides,[31,32,33,34] and hexagonal boron nitride (hBN)[35,36,37] has been investigated theoretically and/or experimentally These studies only focus on 2D materials in the form of monolayers or multilayers composed of the same material
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