Results 71 to 80 of about 48,747 (277)

Cryogenic Capacitive Transimpedance Amplifier for Astronomical Infrared Detectors

IEEE Transactions on Electron Devices, 2004
We have developed a new capacitive transimpedance amplifier (CTIA) that can be operated at 2 K, and have good performance as readout circuits of astronomical far-infrared array detectors. The circuit design of the present CTIA consists of silicon p-MOSFETs and other passive elements.
Nagata, Hirohisa, Shibai, Hiroshi, Hirao, Takanori, Watabe, Toyoki, Noda, Manabu, Hibi, Yasunori, Kawada, Mitsunobu, Nakagawa, Takao   +7 more
openaire   +2 more sources

Exploiting Two‐Photon Lithography, Deposition, and Processing to Realize Complex 3D Magnetic Nanostructures

Advanced Functional Materials, EarlyView.
Two‐photon lithography (TPL) enables 3D magnetic nanostructures with unmatched freedom in geometry and material choice. Advances in voxel control, deposition, and functionalization open pathways to artificial spin ices, racetracks, microrobots, and a number of additional technological applications.
Joseph Askey, Arjen van den Berg, Sandra Ruiz Gomez, Claire Donnelly, Dirk Grundler, Sam Ladak   +5 more
wiley   +1 more source

The Simons Observatory: Beam Characterization for the Small Aperture Telescopes

The Astrophysical Journal
We use time-domain simulations of Jupiter observations to test and develop a beam reconstruction pipeline for the Simons Observatory Small Aperture Telescopes.
Nadia Dachlythra, Adriaan J. Duivenvoorden, Jon E. Gudmundsson, Matthew Hasselfield, Gabriele Coppi, Alexandre E. Adler, David Alonso, Susanna Azzoni, Grace E. Chesmore, Giulio Fabbian, Ken Ganga, Remington G. Gerras, Andrew H. Jaffe, Bradley R. Johnson, Brian Keating, Reijo Keskitalo, Theodore S. Kisner, Nicoletta Krachmalnicoff, Marius Lungu, Frederick Matsuda, Sigurd Naess, Lyman Page, Roberto Puddu, Giuseppe Puglisi, Sara M. Simon, Grant Teply, Tran Tsan, Edward J. Wollack, Kevin Wolz, Zhilei Xu   +29 more
doaj   +1 more source

Unprecedented Spin‐Lifetime of Itinerant Electrons in Natural Graphite Crystals

Advanced Functional Materials, EarlyView.
Graphite exhibits extraordinary spintronic potential, with electron spin lifetimes reaching 1,000 ns at room temperature ‐ over 100 times longer than graphene‐based devices. Magnetic resonance spectroscopy reveals strong anisotropy: out‐of‐plane spins live 50 times longer than their in‐plane counterparts.
Bence G. Márkus, Dávid Beke, Lili Vajtai, András Jánossy, László Forró, Ferenc Simon   +5 more
wiley   +1 more source

Thickness‐Dependent Skyrmion Evolution in Fe3GeTe2 During Magnetization Reversal

Advanced Functional Materials, EarlyView.
Thickness‐ and field‐dependent magnetic domain behavior in 2D van der Waals Fe3GeTe2 is studied using Lorentz TEM and micromagnetic simulations. A patch‐like domain phase evolves from skyrmions during magnetization reversal, and step edges between thickness regions act as pinning sites.
Jennifer Garland, John Fullerton, PeiYu Cai, Rabindra Basnet, Santosh Karki Chhetri, Jin Hu, Elton J. G. Santos, Yue Li, Charudatta Phatak, Amanda Petford‐Long   +9 more
wiley   +1 more source

Detecting fluorescent dark matter with X-ray lasers

European Physical Journal C: Particles and Fields, 2018
Fluorescent dark matter has been suggested as a possible explanation of both the 3.5 keV excess in the diffuse emission of the Perseus Cluster and of the deficit at the same energy in the central active galaxy within that cluster, NGC 1275.
Francesca Day, Malcolm Fairbairn
doaj   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

The Footprint Database and Web Services of the Herschel Space Observatory [PDF]

, 2016
Data from the Herschel Space Observatory is freely available to the public but no uniformly processed catalogue of the observations has been published so far.
Budavári, Tamás, Dobos, László, Exter, Katrina, Kiss, Csaba, Teyssier, David, Valtchanov, Ivan, Varga-Verebélyi, Erika, Verdugo, Eva   +7 more
core   +3 more sources

Astronomical X-ray polarimetry based on photoelectric effect with microgap detectors [PDF]

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001
45 pages included 13 figures; (Accepted for publication in : Nuclear Instruments and Methods in Physics Research A)
Soffitta P. 1, Costa E. 2, Di Persio G. 3, Morelli E. 4, Rubini A. 5, Bellazzini R. 6, Brez A. 7, Raffo R. 8, Spandre G. 9, Joy David 10   +9 more
openaire   +3 more sources

Impact of Lattice Heterogeneity on Broadband Optical Retardation in Stacked 2D Perovskite Single Crystals

Advanced Functional Materials, EarlyView.
It is shown that interfaces between organic and inorganic layers govern long‐range stacking disorder and in‐plane anisotropy in 2D metal‐halide perovskites. By comparing single‐cation AB‐AB and ordered mixed‐cation ABCD‐ABCD stackings, SCXRD reveals enhanced mosaicity, while optics confirm high birefringence.
Yixuan Dou, Nicholas Nici, Sunhao Liu, Xiaoming Wang, Yanfa Yan, Carla Slebodnick, Lina Quan   +6 more
wiley   +1 more source