Subfemtosecond and Nanometer Plasmon Dynamics with Photoelectron Microscopy: Theory and Efficient Simulations

Davis, Timothy J.; Frank, Bettina; Podbiel, Daniel; Kahl, Philip; Heringdorf, F.‐J. Meyer zu; Gießen, Harald

doi:10.1021/acsphotonics.7b00676

Cited by 24 publications

(29 citation statements)

References 38 publications

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“…The measured yield dependencies and the MPPE PEEM images shown in Figure b suggest a generalization of the two-plasmon emission in eq into a n -plasmon version in the form with β 2 /α 2 = 2 from the previous analysis. Figure c shows corresponding simulations of the MPPE plasmoemission patterns in the focus region (more details of the simulation method are given in ref ). The simulation results are in good agreement with the measurements, apart from a small Ag surface roughness related spatial yield modulation.…”

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confidence: 99%

Imaging the Nonlinear Plasmoemission Dynamics of Electrons from Strong Plasmonic Fields

et al. 2017

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We use subcycle time-resolved photoemission microscopy to unambiguously distinguish optically triggered electron emission (photoemission) from effects caused purely by the plasmonic field (termed "plasmoemission"). We find from time-resolved imaging that nonlinear plasmoemission is dominated by the transverse plasmon field component by utilizing a transient standing wave from two counter-propagating plasmon pulses of opposite transverse spin. From plasmonic foci on flat metal surfaces, we observe highly nonlinear plasmoemission up to the fifth power of intensity and quantized energy transfer, which reflects the quantum-mechanical nature of surface plasmons. Our work constitutes the basis for novel plasmonic devices such as nanometer-confined ultrafast electron sources as well as applications in time-resolved electron microscopy.

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confidence: 99%

Imaging the Nonlinear Plasmoemission Dynamics of Electrons from Strong Plasmonic Fields

et al. 2017

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“…The insets in Figure 4d–f show the FDTD images that show good consistency with experiments in Figure 4a–c. The images are calculated from

Y \propto \int {(E^{‖})}^{4} d t

, [ 33–36 ] as the fourth power of the in‐plane electric field component at the Cd 3 As 2 −vacuum interface. The simulated images of the 4.8 μm‐diameter microdisk and 5 μm‐diameter microdisk have a dark spot and bright spot at the center, whether linearly polarized or circularly polarized excited (Figure S7, Supporting Information), which is consistent with the experiment result due to the constructive (destructive) interference.…”

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Ultraviolet/Visible Quasicylindrical Waves on Semimetal Cd₃As₂ Nanoplates

Xue

Zheng

et al. 2022

Advanced Photonics Research

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Resolving the photonic modes in real space is essential to understand the fundamental process and control of photonic behavior in optoelectric devices. However, the understanding of the photonic modes of semimetal Cd3As2 is still lacking. Herein, the quasicylindrical waves (QCW) on Cd3As2 nanoplates using photoemission electron microscopy (PEEM) are found out. The QCW is due to the optical field scattered by subwavelength indentations, with wavelength being the same as the incident light, and their amplitude decays as r−1/2 from the edges. The transverse magnetic (TM) mode dominates the observed QCW of Cd3As2 nanoplates, which is affected by the edge structure. In broadband from UV to visible, the QCWs on Cd3As2 nanoplates are observed. Further, nanostructures to achieve subwavelength focusing and interference lattice of the Cd3As2 optical QCW are achieved. These findings demonstrate the regulation of QCW, which benefits optimizing the optoelectronic performances of semimetal materials in the future.

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“…σ=1, the resulting SPP field produces a vortex with L=2. [94,96] The disadvantage of a design such as in Figure 6.1 is that if one needs to generate higher order OAM, one must have a large opening and SPP field amplitude decays rapidly as it propagates before it interferes to form a vortex. Thus, this will cause the field components to interfere partially causing them to penetrate into the vortex.…”

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Imaging Light with Photoelectrons on the Nano-Femto Scale

Dai¹

2020

Springer Theses

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The interaction of light with solid state quasiparticles, such as excitons and plasmons, on the nanometer-femtosecond spatio-temporal scale illuminates ultrafast physical and chemical processes on surfaces. In this thesis, I report on the generation, control, and spatio-temporal evolution of 2D evanescent electromagnetic waves confined at the silver (Ag)/vacuum interface; such fields, known as surface plasmon polaritons (SPPs), have joint particle-wave nature. SPPs are generated by the interaction of light with the collective response of conduction band freeelectrons of metals. I image and study the ultrafast dynamics of SPP fields by interferometric timeresolved multi-photon photoemission electron microscopy (ITR-mP-PEEM). First, I report on the generation and propagation of SPPs excited on epitaxially grown Ag nanocrystals. The PEEM images record an interference pattern between SPPs and vacuum light, defined by a mismatch in their propagation wave vectors. Next, I explore the light polarization as a control parameter for the SPP generation, where the in-plane and out-of-plane components of optical electric fields couple differently. For equilateral triangle Ag island samples, the SPP interference patterns strongly depend on both the linear and circular polarizations. For circularly polarized light, the SPP coupling depends on the matching between spin angular momenta (SAM) of light and SPPs. The SAM of evanescent waves like SPPs is transverse and points oppositely when the propagation wave vector is reversed; this is known as the photonic quantum spin Hall effect (QSHE). I demonstrate that QSHE affects the function of an SPP lens coupling structure through a vectorial superposition of longitudinally and transversely coupled SPP waves that are launched by TE waves v (s-polarized) and TM waves (p-polarized), respectively. Finally, I combine my understanding of SPP generation and imaging in a normal-incidence PEEM measurement to explore SPP dynamics when formed by an Archimedean spiral coupling structure. The geometrically defined phase structure of such SPP fields generates plasmonic vortices, whose singularities and time evolution are imaged by PEEM. Based on simulations, I conclude that the SPPs SAM distribution at the vortex core has a stable topological texture of a Néel type Skyrmion, and experimentally locate it by imaging the SPP field singularities.

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Subfemtosecond and Nanometer Plasmon Dynamics with Photoelectron Microscopy: Theory and Efficient Simulations

Cited by 24 publications

References 38 publications

Imaging the Nonlinear Plasmoemission Dynamics of Electrons from Strong Plasmonic Fields

Imaging the Nonlinear Plasmoemission Dynamics of Electrons from Strong Plasmonic Fields

Ultraviolet/Visible Quasicylindrical Waves on Semimetal Cd₃As₂ Nanoplates

Imaging Light with Photoelectrons on the Nano-Femto Scale

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Subfemtosecond and Nanometer Plasmon Dynamics with Photoelectron Microscopy: Theory and Efficient Simulations

Cited by 24 publications

References 38 publications

Imaging the Nonlinear Plasmoemission Dynamics of Electrons from Strong Plasmonic Fields

Imaging the Nonlinear Plasmoemission Dynamics of Electrons from Strong Plasmonic Fields

Ultraviolet/Visible Quasicylindrical Waves on Semimetal Cd3As2 Nanoplates

Imaging Light with Photoelectrons on the Nano-Femto Scale

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Ultraviolet/Visible Quasicylindrical Waves on Semimetal Cd₃As₂ Nanoplates