High resolution XUV Fourier transform holography on a table top

Area of Science:

• Optics and Photonics
• Materials Science
• Nanotechnology

Background:

• Coherent imaging techniques offer the highest resolution in extreme ultraviolet (XUV) and X-ray regions.
• Fourier transform holography (FTH) provides robust and straightforward image reconstruction.
• Advancements in light sources and nanofabrication are crucial for pushing imaging resolution limits.

Purpose of the Study:

• To demonstrate a novel FTH approach for achieving unprecedented resolution in the XUV region.
• To utilize a compact, scalable, and accessible table-top light source for high-resolution imaging.
• To image complex wavelength-scale structures and resolve nanoscale features invisible to electron microscopes.

Main Methods:

• Implementation of Fourier transform holography (FTH) with a high photon flux, table-top extreme ultraviolet (XUV) light source.
• Utilization of cutting-edge nanofabrication technology to create intricate test structures.
• Experimental validation of imaging capabilities on complex wavelength-scale structures, including wave guiding effects.

Main Results:

• Achieved the highest resolution ever reported for FTH at any light source, reaching 34 nanometers (nm).
• Successfully imaged complex structures, revealing wave guiding effects and embedded nanoscale features.
• Demonstrated imaging capabilities that surpass the resolution limits of conventional electron microscopes.

Conclusions:

• The developed FTH technique combined with a compact XUV source represents a significant advancement in high-resolution imaging.
• This approach offers a versatile and reliable tool for nanoscale studies, including ultra-fast dynamics.
• The findings pave the way for broad applications of XUV imaging in diverse scientific and technological fields.