Results 101 to 110 of about 150,928 (284)

Field‐Free, Deterministic Giant Spin‐Orbit Torque Switching of 1.3 T Perpendicular Magnetization With Symmetry‐Lifted Topological Surface States

open access: yesAdvanced Materials, EarlyView.
We show a giant, bias‐field free, deterministic, spin‐orbit‐torque switching of perpendicular hard magnets with HC over 1.3 T. By combining the three‐fold 3m symmetry from topological insulator surface states with the rectangular mm2 symmetry from the 2 x 1 intercalation in Cr3Te4, the interface symmetry is significantly reduced into a unidirectional m
He Ren   +6 more
wiley   +1 more source

High-Speed Photodetectors for Microwave Photonics

open access: yesApplied Sciences, 2019
This paper reviews high-power photodiodes, waveguide photodetectors, and integrated photodiode-antenna emitters with bandwidths up to 150 GHz. Results from heterogeneous III-V photodiodes on silicon and Ge-on-Si photodiode arrays for analog applications ...
Keye Sun, Andreas Beling
doaj   +1 more source

VUV irradiance measurement of a 2.45 GHz microwave-driven hydrogen discharge

open access: yes, 2015
Absolute values of VUV-emission of a 2.45 GHz microwave-driven hydrogen discharge are reported. The measurements were performed with a robust and straightforward method based on a photodiode and optical filters.
Kalvas, T.   +6 more
core   +1 more source

Beyond Earth: Resilience of Quasi‐2D Perovskite Solar Cells in Space

open access: yesAdvanced Materials, EarlyView.
In the article (DOI: 10.1002/adma.202520433), Christoph Putz and co‐workers demonstrate rigid quasi‐2D perovskite solar cells operating in low Earth orbit, delivering stable power for more than 100 days under real‐space conditions. In‐orbit performance is correlated with extensive ground‐based thermal and proton‐irradiation studies on rigid and ...
Christoph Putz   +17 more
wiley   +1 more source

Development of flip-chip technology for the optical drive of superconducting circuits [version 2; peer review: 1 approved, 2 approved with reservations]

open access: yesOpen Research Europe
We discuss the flip-chip mounting process of photodiodes and fiber sleeves on silicon substrates to meet the increasing demand for fabrication of highly integrated and hybrid quantum circuits for operation at cryogenic temperatures.
Shekhar Priyadarshi   +7 more
doaj   +1 more source

Scalable Production of Graphene/Semiconducting Single-Wall Carbon Nanotube Film Schottky Broadband Photodiode Array with Enhanced Photoresponse

open access: yesApplied Sciences, 2018
A general approach was developed to fabricate graphene/semiconducting single-wall carbon nanotube (graphene/s-SWCNT) film Schottky junctions on a large scale.
Jun Cao   +4 more
doaj   +1 more source

Simple circuit positions film frames in projector [PDF]

open access: yes, 1965
Individual frames on a photographic film strip in a projector are automatically positioned by a simple circuit. The circuit uses a photodiode that senses frame registry position and a relay that stops the film-advance motor to suspend the film at point ...
Silver, R. H.
core   +1 more source

Emergent Freestanding Complex Oxide Membranes for Multifunctional Applications

open access: yesAdvanced Materials, EarlyView.
This review surveys freestanding oxide membranes and covers fabrication and three pathways for studies and devices: strain‐free and strained membranes, and van der Waals‐integrated heterostructures. We show how coupled oxide responses map onto these routes and cross‐couple to expand behaviors.
Baowen Li   +6 more
wiley   +1 more source

Synthesis and Characterization of Perovskite Na0.5Bi0.5Ti0.94Fe0.06O2.97 Film for Photovoltaic Applications [PDF]

open access: yesJournal of Applied Sciences and Nanotechnology
In this study, sodium bismuth titanate ferroelectric ceramics with a nanoscale structure and low iron content (NBTF) were prepared, providing an alternative to lead-based materials. Lead poses environmental and health risks due to its toxicity. NBTF aims
Husam Nahedh   +2 more
doaj   +1 more source

Self‐Assembled Fluorescent Nanodiamond Layers for Quantum Imaging

open access: yesAdvanced Materials Interfaces, EarlyView.
We developed a simple, scalable method for coating surfaces with fluorescent nanodiamonds. By optimizing the coating process, we created uniform, dense layers that enable high‐resolution magnetic imaging using the nitrogen‐vacancy (NV) center in nanodiamonds. This approach enables the development of cost‐effective quantum‐sensing and imaging substrates
Katherine Chea   +8 more
wiley   +1 more source

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