Orientation-dependent transition rule in high-order harmonic generation from solids

Abstract

We study the role of transition rule in high-order harmonic generation from solids driven by linearly polarized laser fields. The orientation-dependent transition dipoles can regulate the emergence of the multi-plateau structure. In the multi-plateau zone, however, different from the mechanisms of step-by-step excitation reported previously, we find that the emission time and orientationdependent yields exhibit synchronization and more fine patterns, respectively. And the orientationdependent yields and its fine patterns can be attributed to the collective contribution of the transition rule and quantum-path interference. Therefore, to better understand the constructive and destructive patterns in the orientation-dependent yields, we propose a scheme of intercycle interference, which can further be utilized as a tool to image the structure of the solids and provide an avenue to optimize the electron dynamics in solids for the production of attosecond pulses in a compact setup.

Probing the dephasing time of crystals via spectral properties of high-order harmonic generation

“…[32]. Mechanisms of the harmonic yield modulation had guided us toward the retrieve of the dynamic phase of Bloch electron [32,43]. It is also worthwhile to note that this theoretical detection scheme with varying wavelength is not limited to MIR laser field, thereby being feasible to terahertz field and other laser parameters.…”

Temperature-induced dephasing in high-order harmonic generation from solids

“…High harmonic generation (HHG) from solids is at the forefront of an ongoing attosecond science and strong field physics [1,2]. Solid-state HHG provides a significant view to explore the emerging condensed matter systems [3][4][5][6][7][8][9][10][11][12][13], for example, two-dimensional materials [14,15], topological insulators [16,17], mott insulators [18,19], disorder solids [20][21][22][23] and liquids [24]. In contrast to HHG in gases, strong-field induced electronic dynamics among the periodic nuclei inevitably suffers the manybody scatterings.…”

Crystal-momentum-resolved contributions to multiple plateaus of high-order harmonic generation from band-gap materials

“…Two main theoretical approaches to study HHG in solids include (i) the time-dependent Schrödinger equation (TDSE) for individual Bloch electrons with specific k values [25][26][27][28][29][30][31][32][33][34][35], and (ii) many-electron approaches such as the semiconductor Bloch equations (SBEs) [36][37][38][39][40][41][42][43][44][45][46] and the time-dependent density-functional theory (TDDFT) [23,[47][48][49][50][51][52][53][54][55][56]. In Ref.…”