Visualizing Standing Light Waves in Continuous-Beam Transmission Electron Microscopy

IF 6.5 1区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Photonics Pub Date : 2025-01-31 DOI:10.1021/acsphotonics.4c0182410.1021/acsphotonics.4c01824

Jonathan T. Weber, Niklas Müller, Alexander Schröder and Sascha Schäfer*,

{"title":"Visualizing Standing Light Waves in Continuous-Beam Transmission Electron Microscopy","authors":"Jonathan T. Weber, Niklas Müller, Alexander Schröder and Sascha Schäfer*, ","doi":"10.1021/acsphotonics.4c0182410.1021/acsphotonics.4c01824","DOIUrl":null,"url":null,"abstract":"<p >The phase-resolved imaging of confined light fields by homodyne detection is a cornerstone of metrology in nano-optics and photonics, but its application in electron microscopy has been limited so far. Here, we report the mapping of optical modes in a waveguide structure by illumination with femtosecond light pulses in a continuous-beam transmission electron microscope. Multiphoton photoemission results in a remanent charging pattern which we image by Lorentz microscopy. The resulting image contrast is linked to the intensity distribution of the standing light wave and is quantitatively described within an analytical model. The robustness of the approach is showcased in a wider parameter range and more complex sample geometries including micro- and nanostructures. We discuss further applications of light-interference-based charging for electron microscopy with in situ optical excitation, laying the foundation for advanced measurement schemes for the phase-resolved imaging of propagating light fields.</p>","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"12 2","pages":"819–827 819–827"},"PeriodicalIF":6.5000,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsphotonics.4c01824","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Photonics","FirstCategoryId":"101","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsphotonics.4c01824","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The phase-resolved imaging of confined light fields by homodyne detection is a cornerstone of metrology in nano-optics and photonics, but its application in electron microscopy has been limited so far. Here, we report the mapping of optical modes in a waveguide structure by illumination with femtosecond light pulses in a continuous-beam transmission electron microscope. Multiphoton photoemission results in a remanent charging pattern which we image by Lorentz microscopy. The resulting image contrast is linked to the intensity distribution of the standing light wave and is quantitatively described within an analytical model. The robustness of the approach is showcased in a wider parameter range and more complex sample geometries including micro- and nanostructures. We discuss further applications of light-interference-based charging for electron microscopy with in situ optical excitation, laying the foundation for advanced measurement schemes for the phase-resolved imaging of propagating light fields.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

11.90

自引率

5.70%

发文量

438

审稿时长

2.3 months

期刊介绍： Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.