Ultrafast electron microscopy in material science Project supported by the National Basic Research Program of China (Grant No. 2015CB921300), the National Key Research and Development Program of China (Grant Nos. 2016YFA0300300, 2017YFA0504703, and 2017YFA0302900), the National Natural Science Foundation of China (Grant Nos. 11604372, 11474323, and 11774391), the “Strategic Priority Research Program (B)” of the Chinese Academy of Sciences (Grant No. XDB07020000), and the Scientific Instrument Developing Project of the Chinese Academy of Sciences (Grant No. ZDKYYQ20170002). Z. A. L acknowledges the financial support of the Hundred Talent Program B from CAS. |
(color online) (a) Black line indicates the electron-energy spectrum measured when the swift electrons arrive at the C nanotube 2 ps in advance of the pump light. The red line indicates the electron-energy spectrum measured when the swift electrons and pump light arrive at the C nanotube simultaneously. The small inset shows details regarding the energy-gain side of the spectrum, with 5× magnification. (b) Magnified energy spectrum showing the satellite peaks due to the emission and absorption of the near-field photons. (c, d) PINEM and electron microscopic images of pairs of Ag nanoparticles. The distances between the particles are 32, 47, and 250 nm. The directions of the polarization of the excitation laser are different. Polarization of 45° counterclockwise is applied in panels (c) and (d), whereas horizontal polarization is applied in panel (e). Reprinted from Refs. [ |