We demonstrate an order-of-magnitude energy scaling of a white-light seeded noncollinear optical parametric amplifier in the visible. The generated pulses, tunable between 520 and 650 nm with sub-25-fs duration, had energies up to 310 microJ with 20% blue-pump-to-signal energy conversion efficiency at 540 nm. This new ultrafast source will make possible numerous extreme nonlinear optics applications. As a first application, we demonstrate the generation of tunable vacuum ultraviolet pulses.
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http://dx.doi.org/10.1364/ol.31.003629 | DOI Listing |
Nanoscale Horiz
December 2024
Electrical and Computer Engineering, The Grainger College of Engineering, University of Illinois Urbana-Champaign, Urbana, USA.
Antiferromagnetic materials have several unique properties, such as a vanishingly small net magnetization, which generates weak dipolar fields and makes them robust against perturbation from external magnetic fields and rapid magnetization dynamics, as dictated by the geometric mean of their exchange and anisotropy energies. However, experimental and theoretical techniques to detect and manipulate the antiferromagnetic order in a fully electrical manner must be developed to enable advanced spintronic devices with antiferromagnets as their active spin-dependent elements. Among the various antiferromagnetic materials, conducting antiferromagnets offer high electrical and thermal conductivities and strong electron-spin-phonon interactions.
View Article and Find Full Text PDFNatl Sci Rev
June 2024
International Center for Quantum Design of Functional Materials (ICQD), School of Emerging Technology, University of Science and Technology of China, Hefei 230026, China.
Small
December 2024
Center for Spintronics and Quantum Systems, State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China.
Chiral noncollinear magnetic nanostructures, such as skyrmions, are intriguing spin configurations with significant potential for magnetic memory technologies. However, the limited availability of 2D magnetic materials that host skyrmions with Curie temperatures above room temperature presents a major challenge for practical implementation. Chromium tellurides exhibit diverse spin configurations and remarkable stability under ambient conditions, making them a promising platform for fundamental spin physics research and the development of innovative 2D spintronic devices.
View Article and Find Full Text PDFLight pulses in the femtosecond range require sophisticated methods for their precise temporal characterization. Several techniques have been developed over the past decades that deliver the temporal structure of ultrashort light pulses. Still, there are special cases left that cannot be treated directly by established methods.
View Article and Find Full Text PDFComputational Mueller matrix polarimetry holds great promise in biomedical studies and clinical applications, providing comprehensive polarization-related vectorial information within the sample. For backscattering polarization imaging systems aimed at in vivo tissue polarimetry, the measurement results can be affected by the Cartesian coordinates transformation due to the vectorial properties of polarized light and the non-collinear characteristics of the measurement system. It can influence the reliability of polarization information decoding and extraction.
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