Nanoscale-Femtosecond Imaging of Evanescent Surface Plasmons on Silver Film by Photon-Induced Near-Field Electron Microscopy

Fu, Xuewen; Sun, Zhiqin; Ji, Shaozheng; Liu, Fang; Feng, Min; Yoo, Byung‐Kuk; Zhu, Yimei

doi:10.1021/acs.nanolett.1c04774

Cited by 8 publications

(3 citation statements)

References 54 publications

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“…The PINEM-gating technique has been theoretically generalized to the attosecond regime and is expected to produce isolated attosecond electron pulses. [94] As a powerful tool for studying the electron-photon interaction at the nanometer scale, PINEM has been used to image the surface plasmons, including the localized surface plasmon resonance (LSPR) and SPPs, of nanoparticles, [95][96][97] nanotips, [16] metallic nanowires, [98] carbon nanotubes, [90,91] rough metallic films, [99] and biological structures. [100] A new and typical application of PINEM for imaging plasmonic near fields is on an asymmetric bowtie nanostructure.…”

Section: Imaging the Near-field Distribution With The Utemmentioning

confidence: 99%

Capturing the non-equilibrium state in light–matter–free-electron interactions through ultrafast transmission electron microscopy

Wang 汪,

Sun 孙,

Li 李

et al. 2023

Chinese Phys. B

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Ultrafast transmission electron microscope (UTEM) with the multimodality of time-resolved diffraction, imaging, and spectroscopy provides a unique platform to reveal the fundamental features associated with the interaction between free electrons and matter. In this review, we summarize the principles, instrumentation, and recent developments of the UTEM and its applications in capturing dynamic processes and non-equilibrium transient states. The combination of the transmission electron microscope with a femtosecond laser via the pump–probe method guarantees the high spatiotemporal resolution, allowing the investigation of the transient process in real, reciprocal and energy space. Ultrafast structural dynamics can be studied by diffraction and imaging methods, revealing the coherent acoustic phonon generation and photo-induced phase transition process. In the energy dimension, time-resolved electron energy-loss spectroscopy enables the examination of the intrinsic electronic dynamics of materials, while the photon-induced near-field electron microscopy extends the application of the UTEM to the imaging of optical near fields with high real-space resolution. It is noted that light–free-electron interactions have the ability to shape electron wave packets in both longitudinal and transverse directions, showing the potential application in the generation of attosecond electron pulses and vortex electron beam.

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Section: Imaging the Near-field Distribution With The Utemmentioning

confidence: 99%

Capturing the non-equilibrium state in light–matter–free-electron interactions through ultrafast transmission electron microscopy

Wang 汪,

Sun 孙,

Li 李

et al. 2023

Chinese Phys. B

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“…相结合而发展出来的技术 [66] 图 8 (a) 单个碳纳米管的PINEM时间分辨图像. 图片左上角的时间表示电子波包与飞秒脉冲到达纳米管的延迟时间, 颜色表示飞秒脉冲在纳米结构表面周围产生的场强度分布及其随时间的衰减 [67] ; (b) PINEM系统示意图(左)和采集的银纳米线在不同时间延迟下的电子能量损失谱(EELS)(右) [68] ; (c) PINEM系统示意图及银膜表面等离激元的时间分辨能量过滤图像 [69] Fig. 8.…”

Section: 利用Spslm系统可以对飞秒激光烧蚀过程unclassified

“…8. (a) PINEM result of an individual nanotube, the time in the upper left corner of the blue figures represents the delay time of the electron wave packet reaching the nanotube, and the color reveals the field intensity distribution around the surface of the nanostructure and its decay over time [67] ; (b) schematic illustration of the PINEM apparatus (left) and electron energy-loss spectroscopy (EELS) data for pulsed-electrons interacting with the plasmon near-field (right) [68] ; (c) schematic diagram of the system and energy-filtered time-resolved images of the surface plasmons on the silver film [69] .…”

Section: 利用Spslm系统可以对飞秒激光烧蚀过程mentioning

confidence: 99%

Research progress of ultra-high spatiotemporally resolved microscopy

Wei,

Ni,

et al. 2023

Acta Phys. Sin.

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High-resolution microscopy has opened the door to the exploration of the micro-world, while femtosecond laser has provided a measurement method for the detection of ultrafast physical/chemical phenomena. Combination of these two techniques can produce new microscopic techniques with both ultra-high spatial resolution and ultra-fast temporal resolution, and thus has great importance for exploring new scientific phenomena and mechanisms at extremely small spatial and temporal scales. This paper reviews the basic principles and properties of main international microscopic techniques with ultra-high time- and space-resolution, and introduces the latest research progress of their applications in varies fields such as characterization of optoelectronic materials and devices, monitoring of femtosecond laser micromachining, and detection of surface plasmon excitation dynamics. In order to present these research works systematically, we classify these techniques based on time and space dimensions, including the near-field multi-pulse imaging techniques, the far-field multi-pulse imaging techniques, and the far-field single-pulse imaging techniques. In chapter 2, we introduce the principles and characteristics of the ultra-high spatiotemporal resolved microscopic techniques. The near-field multi-pulse spatiotemporal microscopic techniques based on nano-probe are described in Section 2.1, which show the combination of common near-field imaging techniques such as AFM(Atomic Force Microscopy, AFM), NSOM(near-field scanning optical microscopy, NSOM), STM(Scanning Tunneling Microscope, STM) and the ultra-fast temporal detection of pump-probe technique. In section 2.2 we introduce the far-field multi-pulse spatiotemporal microscopic techniques. In contrast to near-field cases, the far-field spatiotemporal microscopic techniques have lower spatial resolution but bring more advantages of being non-invasive, non-contact, wider field of view, and faster imaging speed. In section 2.3 we introduce the far-field single-pulse spatiotemporal microscopic techniques, which use a single ultrafast light pulse to capture dynamic process at different moments in time, enabling real-time imaging of ultrafast phenomena. In chapter 3, the advances in the application of the ultra-high spatiotemporal resolved microscopic techniques have been introduced in many frontier areas, including the monitoring of femtosecond laser micromachining in section 3.1, the detection of optoelectronic materials/devices in section 3.2, the characterization of surface plasmon dynamics in section 3.3. Finally, in chapter 4, we summarize the features of all above introduced spatiotemporal microscopic techniques in a table, including the spatial/temporal resolution, advantages and disadvantages of each technique, and provides an outlook on future development trends in this research field. Looking ahead, ultra-high spatiotemporal resolved microscopy is rapidly evolving towards the trend of "smaller, faster, smarter and more extensive". Its development not only promotes the research progress of the microscopy technology, but also provides a powerful tool for various applications such as precision machining, two-dimensional material dynamics, optoelectronic device design and characterisation.

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Precision-controlled ultrafast electron microscope platforms. A case study: Multiple-order coherent phonon dynamics in 1T-TaSe2 probed at 50 fs–10 fm scales

Sun,

Williams,

Sharma

et al. 2024

Structural Dynamics

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We report on the first detailed beam tests attesting the fundamental principle behind the development of high-current-efficiency ultrafast electron microscope systems where a radio frequency (RF) cavity is incorporated as a condenser lens in the beam delivery system. To allow for the experiment to be carried out with a sufficient resolution to probe the performance at the emittance floor, a new cascade loop RF controller system is developed to reduce the RF noise floor. Temporal resolution at 50 fs in full-width-at-half-maximum and detection sensitivity better than 1% are demonstrated on exfoliated 1T-TaSe2 system under a moderate repetition rate. To benchmark the performance, multi-terahertz edge-mode coherent phonon excitation is employed as the standard candle. The high temporal resolution and the significant visibility to very low dynamical contrast in diffraction signals via high-precision phase-space manipulation give strong support to the working principle for the new high-brightness femtosecond electron microscope systems.

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Nanoscale-Femtosecond Imaging of Evanescent Surface Plasmons on Silver Film by Photon-Induced Near-Field Electron Microscopy

Cited by 8 publications

References 54 publications

Capturing the non-equilibrium state in light–matter–free-electron interactions through ultrafast transmission electron microscopy

Capturing the non-equilibrium state in light–matter–free-electron interactions through ultrafast transmission electron microscopy

Research progress of ultra-high spatiotemporally resolved microscopy

Precision-controlled ultrafast electron microscope platforms. A case study: Multiple-order coherent phonon dynamics in 1T-TaSe2 probed at 50 fs–10 fm scales

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