Generation and application of bessel beams in electron microscopy
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- 作者：Vincenzo Grilloa ; b ; vincenzo.grillo@cnr.it" class="auth_mail" title="E-mail the corresponding author ; Jé ; ré ; mie Harrisc ; Gian Carlo Gazzadia ; Roberto Balbonid ; Erfan Mafakherie ; Mark R. Dennisf ; Stefano Frabbonia ; e ; Robert W. Boydc ; Ebrahim Karimic
- 关键词：Bessel beams ; Holographic beam shaping ; Vortex beams ; STEM ; Fresnel diffraction
- 刊名：Ultramicroscopy
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：166
- 期：Complete
- 页码：48-60
- 全文大小：1597 K
文摘
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Bessel beams with different convergence, topological charge, visible fringes are demonstrated.
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The relation between the Fresnel hologram and the probe shape is explained by detailed calculations and experiments.
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Among the holograms here presented the highest relative efficiency is 37%, the best result ever reached for blazed holograms.