Multi-Wavelength Ptychography for Wavefront Sensing

Antonios Pelekanidis, Mengqi Du, Xiaomeng Liu, Fengling Zhang, Kjeld S.E. Eikema, Stefan Witte

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

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Abstract

Increasing the resolution of imaging systems has been a driving force for science, ranging from biomedicine to semiconductor applications. According to the diffraction limit, the achievable imaging resolution can be improved by using short wavelengths. Specifically, extreme ultraviolet (XUV) light enables nm-scale resolution. Coherent XUV light can be generated by means of high harmonic generation (HHG), where a driving laser with high pulse energy interacts with a non-linear medium. Since the use of lenses in this spectral range is highly challenging, lensless imaging methods such as ptychography [1] have proven to be effective [2]. In ptychography, complex-valued images of both the object and the wavefront of the light beam are numerically reconstructed from a series of diffraction patterns acquired by scanning an object laterally to the source. In this work we develop ptychography into a high-resolution, multi-wavelength XUV wavefront sensor, and use it to characterize our HHG source. The spectrally-resolved wavefront reconstructions provide insight into physical processes that happen during HHG, and can facilitate the use of the high harmonic beams for imaging purposes.

Original languageEnglish
Title of host publication2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference (CLEO/Europe-EQEC)
Subtitle of host publication[Proceedings]
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages1
ISBN (Electronic)9798350345995
ISBN (Print)9798350346008
DOIs
Publication statusPublished - 2023
Event2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023 - Munich, Germany
Duration: 26 Jun 202330 Jun 2023

Conference

Conference2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Country/TerritoryGermany
CityMunich
Period26/06/2330/06/23

Bibliographical note

Publisher Copyright:
© 2023 IEEE.

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