Alexander Kirsche
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View article: Visualizing the ultra-structure of microorganisms using table-top extreme ultraviolet imaging
Visualizing the ultra-structure of microorganisms using table-top extreme ultraviolet imaging Open
Table-top extreme ultraviolet (EUV) microscopy offers unique opportunities for label-free investigation of biological samples. Here, we demonstrate ptychographic EUV imaging of two dried, unstained model specimens: germlings of a fungus ( …
View article: Visualizing the ultra-structure of microorganisms using table-top extreme ultraviolet imaging
Visualizing the ultra-structure of microorganisms using table-top extreme ultraviolet imaging Open
Table-top extreme ultraviolet (EUV) microscopy offers unique opportunities for label-free investigation of biological samples. Here, we demonstrate ptychographic EUV imaging of two dried, unstained model specimens: germlings of a fungus (A…
View article: Continuously tunable high photon flux high harmonic source
Continuously tunable high photon flux high harmonic source Open
In this work, a continuously tunable extreme ultraviolet source delivering a state-of-the-art photon flux of >10 11 ph/s/eV spanning from 50 eV to 70 eV is presented. The setup consists of a high-power fiber laser with a subsequent multipa…
View article: Material-specific high-resolution table-top extreme ultraviolet microscopy
Material-specific high-resolution table-top extreme ultraviolet microscopy Open
View article: Material-specific high-resolution table-top extreme ultraviolet microscopy
Material-specific high-resolution table-top extreme ultraviolet microscopy Open
Microscopy with extreme ultraviolet (EUV) radiation holds promise for high-resolution imaging with excellent material contrast, due to the short wavelength and numerous element-specific absorption edges available in this spectral range. At…
View article: Ultra-short-pulse high-average-power megahertz-repetition-rate coherent extreme-ultraviolet light source
Ultra-short-pulse high-average-power megahertz-repetition-rate coherent extreme-ultraviolet light source Open
High harmonic generation (HHG) enables coherent extreme-ultraviolet (XUV) radiation with ultra-short pulse duration in a table-top setup. This has already enabled a plethora of applications. Nearly all of these applications would benefit f…
View article: Generation of coherent broadband high photon flux continua in the XUV with a sub-two-cycle fiber laser
Generation of coherent broadband high photon flux continua in the XUV with a sub-two-cycle fiber laser Open
High harmonic sources can provide ultrashort pulses of coherent radiation in the XUV and X-ray spectral region. In this paper we utilize a sub-two-cycle femtosecond fiber laser to efficiently generate a broadband continuum of high-order ha…
View article: Annular beam driven high harmonic generation for high flux coherent XUV and soft X-ray radiation
Annular beam driven high harmonic generation for high flux coherent XUV and soft X-ray radiation Open
Separation of the high average power driving laser beam from the generated XUV to soft-X-ray radiation poses great challenges in collinear HHG setups due to the losses and the limited power handling capabilities of the typically used separ…