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Here we lists some of our recent or selected highlights in this research direction.
High-harmonic generation in solids
This tutorial serves as a good starting point for researchers interested in the theory of high-harmonic generation, addressing gauge choices for structure and couplings, semiclassical perspectives, macroscopic considerations.
L. Yue* and M. B. Gaarde*, Journal of the Optical Society of America B 39, 535 (2022)
This theoretical work characterizes the competition between the non-perturbative anomalous current and the interband current, enabling rigorous of Berry-curvature spectroscopy.
L. Yue* and M. B. Gaarde*, Physical Review Letters 130, 166903 (2023)
In collaboration with the experimental group of Michael Zuerch at Berkeley, this work demonstrates that high-harmonic generation (HHG) offers significant potential for probing the energetics and dipole coupling vectors of higher-lying conduction bands in gapped 2D materials.
L. Yue, R. Hollinger*, C. B. Uzundal, B. Nebgen, Z. Gan, E. Najafidehaghani, A. George, C. Spielmann, D. Kartashov, A. Turchanin, D. Y. Qiu, M. B. Gaarde and M. Zuerch*, Physical Review Letters 129, 147401 (2022)
This theoretical work examines the impact of imperfect recollisions in HHG, where electron and hole recollisions occur despite spatial separation. This phenomenon arises from the spatially extended nature of the electron and hole wave packets.
L. Yue* and M. B. Gaarde*, Physical Review Letters 124, 153204 (2020)
All related references:
V. C. Lee, L. Yue, M. B. Gaarde, Y.-H. Chan* and D. Y. Qiu*, "Many-body enhancement of high-harmonic generation in monolayer MoS2", Nature Communications 15, 6228 (2024)
L. Yue* and M. B. Gaarde*, "Characterizing Anomalous High-Harmonic Generation in Solids", Physical Review Letters 130, 166903 (2023)
L. Yue, R. Hollinger*, C. B. Uzundal, B. Nebgen, Z. Gan, E. Najafidehaghani, A. George, C. Spielmann, D. Kartashov, A. Turchanin, D. Y. Qiu, M. B. Gaarde and M. Zuerch*, "Signatures of multi-band effects in high-harmonic generation in monolayer MoS2", Physical Review Letters 129, 147401 (2022)
L. Yue* and M. B. Gaarde*, "Introduction to theory of high-harmonic generation in solids: tutorial", Journal of the Optical Society of America B 39, 535 (2022)
L. Yue* and M. B. Gaarde*, "Expanded view of electron-hole recollisions in solid-state high-order harmonic generation: Full-Brillouin-zone tunneling and imperfect recollisions", Physical Review A 103, 063105 (2021)
L. Yue* and M. B. Gaarde*, "Structure gauges and laser gauges for the semiconductor Bloch equations in high-order harmonic generation in solids", Physical Review A 101, 053411 (2020)
L. Yue and M. B. Gaarde, "Imperfect recollisions in high-harmonic generation in solids", Physical Review Letters 124, 153204 (2020)
Attosecond transient absorption/reflection spectroscopy
This collaboration with Stephen Leone's experimental group at Berkeley explores core exciton decay in MgO using attosecond reflectivity spectroscopy. The study reveals that strong exciton-phonon coupling drastically shortens the exciton decay time from the picosecond to the femtosecond regime.
R. Géneaux*, C. J. Kaplan, L. Yue, A. D. Ross, J. E. Bækhøj, P M. Kraus, H.-T. Chang, A. Guggenmos, M.-Y. Huang, M. Zürch, K. J. Schafer, D. M. Neumark, M. B. Gaarde and S. R. Leone*, Physical Review Letters 124, 207401 (2020)
All related references:
R. Géneaux*, C. J. Kaplan, L. Yue, A. D. Ross, J. E. Bækhøj, P M. Kraus, H.-T. Chang, A. Guggenmos, M.-Y. Huang, M. Zürch, K. J. Schafer, D. M. Neumark, M. B. Gaarde and S. R. Leone*, "Attosecond Time-Domain Measurement of Core-Level-Exciton Decay in Magnesium Oxide", Physical Review Letters 124, 207401 (2020)
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