Time-resolved magnetic domain imaging by x-ray photoemission electron microscopy

Vogel, Jan; Kuch, W.; Bonfim, Marlio; Camarero, Julio; Pennec, Yan; Offi, Francesco; Fukumoto, Keiki; Kirschner, J.; Fontaine, A.; Pizzini, S.

doi:10.1063/1.1564876

Cited by 105 publications

(78 citation statements)

References 12 publications

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“…Conventional PEEM uses ultraviolet (UV) light or X-ray radiation as the excitation source and has been demonstrated as a powerful imaging and characterization tool in the fields of surface physics/chemistry, material growth and magnetic materials. 36,37 In contrast to scanning electron microscopy, PEEM can directly image surface areas emitting photoelectrons in real time without scanning. MP-PEEM is based on the multiphoton photoemission from a species excited by ultrashort (picosecond or femtosecond) laser pulses.…”

Section: Introductionmentioning

confidence: 99%

Direct imaging of the near field and dynamics of surface plasmon resonance on gold nanostructures using photoemission electron microscopy

et al. 2013

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Localized surface plasmon resonance (LSPR) can be supported by metallic nanoparticles and engineered nanostructures. An understanding of the spatially resolved near-field properties and dynamics of LSPR is important, but remains experimentally challenging. We report experimental studies toward this aim using photoemission electron microscopy (PEEM) with high spatial resolution of sub-10 nm. Various engineered gold nanostructure arrays (such as rods, nanodisk-like particles and dimers) are investigated via PEEM using near-infrared (NIR) femtosecond laser pulses as the excitation source. When the LSPR wavelengths overlap the spectrum of the femtosecond pulses, the LSPR is efficiently excited and promotes multiphoton photoemission, which is correlated with the local intensity of the metallic nanoparticles in the near field. Thus, the local field distribution of the LSPR on different Au nanostructures can be directly explored and discussed using the PEEM images. In addition, the dynamics of the LSPR is studied by combining interferometric time-resolved pump-probe technique and PEEM. Detailed information on the oscillation and dephasing of the LSPR field can be obtained. The results identify PEEM as a powerful tool for accessing the near-field mapping and dynamic properties of plasmonic nanostructures. Keywords: femtosecond laser; local field enhancement; near-field imaging; photoemission electron microscopy; surface plasmon resonance INTRODUCTION Because of the rapid development of nanofabrication techniques, metallic nanostructures that can exhibit localized surface plasmon resonance (LSPR) can be fabricated using several methods. The resonance frequency and amplitude of LSPR on metallic nanostructures are known to depend on the metal materials, shapes, and surrounding media. [1][2][3][4] In addition, the LSPR can confine optical fields in nanoscale space, leading to the so-called local field enhancement effect. These unique properties promote the application of LSPR in many fields, such as surface-enhanced Raman scattering, 5-8 sensing, 1,9,10 plasmonassisted photochemical reactions 4,11,12 and photocurrent generation. [13][14][15] To further understand the LSPR mechanism and to optimize the design of the plasmonic nanostructures for most applications, the near-field properties of the LSPR fields (especially the near-field distribution of the plasmonic nanostructures) must be determined. To date, investigations of the optical properties of LSPR have largely relied on far-field spectroscopic techniques or numerical simulations. Several experimental approaches have been utilized to visualize the near field, including scanning photoionization microscopy, 16,17 scanning near-field optical microscopy, 18-21 nonlinear luminescence or fluorescent microscopy, 22,23 nonlinear photopolymerization 24,25 and near-field ablation of a substrate. [26][27][28][29] However, these approaches have

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Section: Introductionmentioning

confidence: 99%

Direct imaging of the near field and dynamics of surface plasmon resonance on gold nanostructures using photoemission electron microscopy

et al. 2013

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“…The successful implementation of nanosecond time resolution into XPEEM was demonstrated just recently. [7][8][9] In this contribution we report on stroboscopic XPEEM studies on permalloy microstructures with a time resolution of 130 ps. The images exhibit a yet unobserved richness of detail, which is attributed to incoherent magnetization rotation processes.…”

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confidence: 99%

Incoherent magnetization rotation observed in subnanosecond time-resolving x-ray photoemission electron microscopy

Schneider

Kuksov

Krasyuk

et al. 2004

Applied Physics Letters

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“…PEEM is becoming increasingly important for studying ultrafast phenomena and processes in magnetic domain structures [21][22][23]. A number of significant developments have also been dedicated to the study of nonlinear photoemission [24] and ultrafast time-resolved surface plasmon dynamics in nanostructures [25][26][27][28][29] by using PEEM in combination with femtosecond and attosecond laser sources more than a decade ago.…”

Section: Introductionmentioning

confidence: 99%

Laser intensity effects in carrier-envelope phase-tagged time of flight-photoemission electron microscopy

et al. 2016

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Time-resolved magnetic domain imaging by x-ray photoemission electron microscopy

Cited by 105 publications

References 12 publications

Direct imaging of the near field and dynamics of surface plasmon resonance on gold nanostructures using photoemission electron microscopy

Direct imaging of the near field and dynamics of surface plasmon resonance on gold nanostructures using photoemission electron microscopy

Incoherent magnetization rotation observed in subnanosecond time-resolving x-ray photoemission electron microscopy

Laser intensity effects in carrier-envelope phase-tagged time of flight-photoemission electron microscopy

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