A multi-band, multi-level, multi-electron model for efficient FDTD simulations of electromagnetic interactions with semiconductor quantum wells

Ravi, Koustuban; Wang, Qian; Ho, Seng Tiong

doi:10.1080/09500340.2015.1024771

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…Importantly, SBE can be coupled to full-vector Maxwell equations through the nonlinear currents and polarizations in a straightforward way. 14,[45][46][47] Feasibility and robustness of a coupled Maxwell-semiconductor Bloch approach for investigating the highorder harmonic spectra for a finite slab and 3D sub-wavelength nanoparticle geometries in the non-perturbative regime of ultrashort laser pulse excitation has been recently demonstrated in Refs. 14,48 Driven either by a Fabry-Perot-like standing wave resonator or by magnetic dipole Mie resonances, inhomogeneously photo-induced carriers are localized in the semiconductor material (GaAs), producing enhanced even and odd harmonics for the resonant geometry and excitation conditions.…”

Section: Non-perturbative Microscopic Modelsmentioning

confidence: 99%

Modeling of low- and high-order harmonic generation in ultrashort laser-excited resonant semiconductor nanostructures

Rudenko

Han

Hagen

et al. 2023

Ultrafast Phenomena and Nanophotonics XXVII

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Ultrashort laser-excited semiconductor nanostructures, supporting individual Mie or collective resonances, can serve as efficient miniaturized sources for low-and high-order harmonic generation. Upon laser excitation, multiple nonlinearities come into interplay on subwavelength spatial and ultrafast temporal scales, including surface and bulk effects, contributions from bound electrons and photo-excited carriers. In turn, transient optical properties affect the structure and the amplitude of the transmitted laser pulse. Computational approaches, coupling ultrashort pulse propagation with semiconductor nonlinear optical response, compatible with the considered spatial and temporal scales, are urgently needed to provide new strategies for efficient light modulation and manipulation, for instance, in order to enhance the nonlinear conversion efficiency. Nonlinear dynamics in ultrashort laser-excited nanostructures will be discussed from the perspective of classical perturbative, semi-classical, and microscopic non-perturbative models based on semiconductor Bloch equations, considering electronic multi-band structure of the material and involved intra-and inter-band transitions.As an example, an enhanced harmonic generation will be shown from a single nanoparticle or periodic array of nanoparticles, supporting Mie and collective lattice resonances, and a subwavelength resonator supporting quasi-bound states in the continuum. Ultrafast processes involved in nonlinear pulse propagation such as spectrum broadening and plasma blue-shift, frequency mixing and saturation in the harmonic yield, as well as the restrictions due to carrier absorption and heating of the sample, will be discussed within the framework of a classical model. Perspectives of applying self-consistent nonlinear Maxwell-based approaches to large-scale problems in nonlinear meta-photonics as well as their current limitations will be finally outlined.

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Section: Non-perturbative Microscopic Modelsmentioning

confidence: 99%

Modeling of low- and high-order harmonic generation in ultrashort laser-excited resonant semiconductor nanostructures

Rudenko

Han

Hagen

et al. 2023

Ultrafast Phenomena and Nanophotonics XXVII

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Dynamically tunable and active hyperbolic metamaterials

et al. 2018

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Self-consistent Maxwell–Bloch model for high-order harmonic generation in nanostructured semiconductors

et al. 2022

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In pursuit of efficient high-order harmonic conversion in semiconductor devices, modeling insights into the complex interplay among ultrafast microscopic electron–hole dynamics, nonlinear pulse propagation, and field confinement in nanostructured materials are urgently needed. Here, a self-consistent approach coupling semiconductor Bloch and Maxwell equations is applied to compute transmission and reflection high-order harmonic spectra for finite slab and sub-wavelength nanoparticle geometries. An increase in the generated high harmonics by several orders of magnitude is predicted for gallium arsenide nanoparticles with a size maximizing the magnetic dipole resonance. Serving as a conceptual and predictive tool for ultrafast spatiotemporal nonlinear optical responses of nanostructures with arbitrary geometry, our approach is anticipated to deliver new strategies for optimal harmonic manipulation in semiconductor metadevices.

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A multi-band, multi-level, multi-electron model for efficient FDTD simulations of electromagnetic interactions with semiconductor quantum wells

Cited by 3 publications

References 35 publications

Modeling of low- and high-order harmonic generation in ultrashort laser-excited resonant semiconductor nanostructures

Modeling of low- and high-order harmonic generation in ultrashort laser-excited resonant semiconductor nanostructures

Dynamically tunable and active hyperbolic metamaterials

Self-consistent Maxwell–Bloch model for high-order harmonic generation in nanostructured semiconductors

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