Chuan Yu's 11 research works with 242 citations and 739 reads, including: Crystal-momentum-resolved contributions to multiple plateaus of high-order harmonic generation from band-gap materials

2018年9月17日 · We find that a donor-doped band-gap material can enhance the overall high-order harmonic generation (HHG) efficiency by several orders of magnitude, compared with undoped and acceptor-doped materials. This significant enhancement, predicted by time-dependent density functional theory simulations, originates from the highest-occupied impurity state which has an isolated energy located within ...

2023年2月17日 · In the past decades, the high harmonic generation (HHG) of gaseous media with the interaction of a driving strong laser has been extensively studied for its potential applications in optical technology, such as attosecond pulse generation and spectral characterization of structural or electronic dynamics ().In the meantime, the “ionization-acceleration-recombination” three-step model has ...

2020年9月8日 · C. Yu, K. K. Hansen, and L. B. Madsen, Enhanced high-order harmonic generation in donor-doped band-gap materials, Phys. Rev. A 99, 013435 (2019). ... (HHG) in band-gap materials, and identify the relevant initial crystal momenta for the first and higher plateaus of the HHG spectra. We do so by using a time-dependent density-functional theory ...

2019年1月8日 · Yu et al. [Citation 70] paid attention to the importance of the dipole moment between valence and conduction bands, and found that the shape of k-space dependent dipole moment plays an important role in harmonic emission, because it determines the interband transition process [Citation 101] in solid HHG. They improved the SBE model and ...

2022年10月11日 · In addition, Yu et al. investigated the double-plateau structure of the HHG spectrum in the bilayer hBN crystal with the driven laser pulse at grazing incidence. They found that the photon energy of the second plateau far beyond atomic-like harmonics can be well explained by the inclusion of backscattering of ionized electrons.

2019年1月28日 · We find that a donor-doped band-gap material can enhance the overall high-order harmonic generation (HHG) efficiency by several orders of magnitude, compared with undoped and acceptor-doped materials. This significant enhancement, predicted by time-dependent density functional theory simulations, originates from the highest occupied impurity state which has an isolated energy located within ...

2020年7月17日 · We study the crystal-momentum-resolved contributions to the high-order harmonic generation (HHG) in band-gap materials, and identify the relevant initial crystal momenta for the first and higher plateaus of the HHG spectra. We do so by using a time-dependent density-functional theory model of one-dimensional linear chains. We introduce a self-consistent periodic treatment for the infinitely ...

Chuan Yu's scientific contributions. ... A 105, L041101 (2022)] as a mechanism to enhance high-order harmonic generation (HHG) in periodic systems with broken translational symmetry. Here we study ...

2019年6月13日 · High-order harmonic generation (HHG) in imperfect crystals, where the disorder is modeled by random shifts of the ionic positions, is studied using time-dependent density-functional theory. When irradiated by midinfrared laser pulses, the disorder-free system produces HHG spectra with two plateaus. Compared with the disorder-free system, disordered systems are found to emit suppressed ...