Maskless Fourier transform holography

Journal Article · Tue Dec 21 00:00:00 EST 2021 · Optics Express

DOI:https://doi.org/10.1364/OE.444455· OSTI ID:1842536

Keskinbora, Kahraman; Levitan, Abraham L. ; Comin, Riccardo

Fourier transform holography is a lensless imaging technique that retrieves an object's exit-wave function with high fidelity. It has been used to study nanoscale phenomena and spatio-temporal dynamics in solids, with sensitivity to the phase component of electronic and magnetic textures. However, the method requires an invasive and labor-intensive nanopatterning of a holography mask directly onto the sample, which can alter the sample properties, forces a fixed field-of-view, and leads to a low signal-to-noise ratio at high resolution. In this work, we propose using wavefront-shaping diffractive optics to create a structured probe with full control of its phase at the sample plane, circumventing the need for a mask. We demonstrate in silico that the method can image nanostructures and magnetic textures and validate our approach with a visible light-based experiment. The method enables investigation of a plethora of phenomena at the nanoscale including magnetic and electronic phase coexistence in solids, with further uses in soft and biological matter research.

• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC0019126
• OSTI ID: 1842536
• Journal Information: Optics Express, Journal Name: Optics Express Vol. 30 Journal Issue: 1; ISSN 1094-4087
• Publisher: Optical Society of America
• Country of Publication: United States
• Language: English