Reconstructions from computer-generated holograms exhibit spurious duplicate images corresponding to higher diffractive orders, originating from the periodic pixels of a spatial light modulator. We explore the possibility of reducing their visibility by randomization of pixel positions at the stage of displaying of the holograms. Experimental validation is shown on a liquid crystal modulator and also in a promising photo-magnetic transparent cobalt-doped yttrium iron garnet, which exhibits spontaneous randomization of written patterns. Micromirror-driven raster scanning of femtosecond pulses is used for point-by-point rewriting of magnetic domains. Recorded holographic patterns diffract visible light beams in accordance with theory and numerical simulations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OL.400857 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Fe O @Au@Cu S Heterostructures Designed for Tri-Modal Therapy: Photo- Magnetic Hyperthermia and Cu Radio-Insertion.
Small
May 2022
Istituto Italiano di Tecnologia (IIT), via Morego 30, Genova, 16163, Italy.
Here, the synthesis and proof of exploitation of three-material inorganic heterostructures made of iron oxide-gold-copper sulfide (Fe O @Au@Cu S) are reported. Starting with Fe O -Au dumbbell heterostructure as seeds, a third Cu S domain is selectively grown on the Au domain. The as-synthesized trimers are transferred to water by a two-step ligand exchange procedure exploiting thiol-polyethylene glycol to coordinate Au and Cu S surfaces and polycatechol-polyethylene glycol to bind the Fe O surface.
View Article and Find Full Text PDFReconstructions from computer-generated holograms exhibit spurious duplicate images corresponding to higher diffractive orders, originating from the periodic pixels of a spatial light modulator. We explore the possibility of reducing their visibility by randomization of pixel positions at the stage of displaying of the holograms. Experimental validation is shown on a liquid crystal modulator and also in a promising photo-magnetic transparent cobalt-doped yttrium iron garnet, which exhibits spontaneous randomization of written patterns.
View Article and Find Full Text PDFSelection rules for all-optical magnetic recording in iron garnet.
Nat Commun
February 2019
Institute for Molecules and Materials, Radboud University, 6525 AJ, Nijmegen, The Netherlands.
Rapid growth of the area of ultrafast magnetism has allowed to achieve a substantial progress in all-optical magnetic recording with femtosecond laser pulses and triggered intense discussions about microscopic mechanisms responsible for this phenomenon. The typically used metallic medium nevertheless considerably limits the applications because of the unavoidable heat dissipation. In contrast, the recently demonstrated photo-magnetic recording in transparent dielectric garnet for all practical purposes is dissipation-free.
View Article and Find Full Text PDFUltrafast nonthermal photo-magnetic recording in a transparent medium.
Nature
February 2017
Radboud University, Institute for Molecules and Materials, 135 Heyendaalseweg, 6525 AJ Nijmegen, The Netherlands.
Discovering ways to control the magnetic state of media with the lowest possible production of heat and at the fastest possible speeds is important in the study of fundamental magnetism, with clear practical potential. In metals, it is possible to switch the magnetization between two stable states (and thus to record magnetic bits) using femtosecond circularly polarized laser pulses. However, the switching mechanisms in these materials are directly related to laser-induced heating close to the Curie temperature.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!