Tailoring electron vortex beams with customizable intensity patterns by electron diffraction holography
전자연사 전식술로 맞춤형 강도 도안을 갖춘 전자와선 빔을 맞춤 제작하다
Haz de vórtice de electrones con patrones de intensidad personalizables personalizados con una Holografía de difracción electrónica
Faisceau de Vortex d'électrons personnalisé avec motif d'intensité personnalisable avec holographie de diffraction d'électrons
Настройка электронного вихревого пучка с настраиваемой прочностью с помощью электронной дифракционной голографии
Pengcheng Huo 霍鹏程 ¹, Ruixuan Yu 于睿儇 ¹, Mingze Liu 刘明泽 ¹, Hui Zhang 张辉 ¹, Yan-qing Lu 陆延青 ¹ ², Ting Xu 徐挺 ¹ ²
¹ National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
中国南京 南京大学 固体微结构物理国家重点实验室 人工微结构科学与技术协同创新中心
² College of Engineering and Applied Sciences, Key Laboratory of Intelligent Optical Sensing and Manipulation and Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
中国 南京 南京大学现代工程与应用科学学院 智能光传感与调控技术教育部重点实验室 江苏省人工功能材料重点实验室
Opto-Electronic Advances, 26 February 2024

An electron vortex beam (EVB) carrying orbital angular momentum (OAM) plays a key role in a series of fundamental scientific researches, such as chiral energy-loss spectroscopy and magnetic dichroism spectroscopy. So far, almost all the experimentally created EVBs manifest isotropic doughnut intensity patterns.

Here, based on the correlation between local divergence angle of electron beam and phase gradient along azimuthal direction, we show that free electrons can be tailored to EVBs with customizable intensity patterns independent of the carried OAM. As proof-of-concept, by using computer generated hologram and designing phase masks to shape the incident free electrons in the transmission electron microscope, three structured EVBs carrying identical OAM are tailored to exhibit completely different intensity patterns.

Furthermore, through the modal decomposition, we quantitatively investigate their OAM spectral distributions and reveal that structured EVBs present a superposition of a series of different eigenstates induced by the locally varied geometries. These results not only generalize the concept of EVB, but also demonstrate an extra highly controllable degree of freedom for electron beam manipulation in addition to OAM.
Opto-Electronic Advances_1
Opto-Electronic Advances_2
Opto-Electronic Advances_3
Opto-Electronic Advances_4
Reviews and Discussions
Ultrafast dynamics of femtosecond laser-induced high spatial frequency periodic structures on silicon surfaces
Optical scanning endoscope via a single multimode optical fiber
Simultaneously realizing thermal and electromagnetic cloaking by multi-physical null medium
Data-driven polarimetric imaging: a review
Robust measurement of orbital angular momentum of a partially coherent vortex beam under amplitude and phase perturbations
Deblurring, artifact-free optical coherence tomography with deconvolution-random phase modulation
Inverse design for material anisotropy and its application for a compact X-cut TFLN on-chip wavelength demultiplexer
Improved spatiotemporal resolution of anti-scattering super-resolution label-free microscopy via synthetic wave 3D metalens imaging
Flat soliton microcomb source
Smart palm-size optofluidic hematology analyzer for automated imaging-based leukocyte concentration detection
Applications of lasers: A promising route toward low-cost fabrication of high-efficiency full-color micro-LED displays
Light-stimulated adaptive artificial synapse based on nanocrystalline metal-oxide film

Previous Article                                Next Article
Copyright © Hot Paper