Results 91 to 100 of about 74,003 (312)

Dimensionally Resolved Nanostructures of an Atomically Precise and Optically Active 1D van der Waals Helix

Advanced Materials, EarlyView.
The ability to grow nanostructures based on inorganic helical crystals with long‐range order will enable a platform to realize physical states that arise from chirality. Herein, it is demonstrated that controlled vapor phase deposition of an atomically precise helical crystal, GaSI, into ultrathin 1D nanowires and quasi‐2D nanoribbons.
Kaitlyn G. Dold, Joni Spencer, Griffin M. Milligan, Sirisak Singsen, Zhe Wang, Marcus Marracci, Dmitri Leo Mesoza Cordova, Thanh N. Huynh, Kaleolani Ogura, Toshihiro Aoki, Xingxu Yan, Dmitry A. Fishman, Xiaoqing Pan, Ruqian Wu, Elizabeth M. Y. Lee, Maxx Q. Arguilla   +15 more
wiley   +1 more source

Astronomical photonics in the context of infrared interferometry and high-resolution spectroscopy

, 2016
We review the potential of Astrophotonics, a relatively young field at the interface between photonics and astronomical instrumentation, for spectro-interferometry.
Aggarwal, Berio, Coudé du Foresto, Diener, Eisenhauer, Errmann, Froehly, Guieu, Haynes, Jorden, Labadie, Labeye, Lhomé, Lindley, Martin, Martín, Norris, Russell, Tepper   +18 more
core   +3 more sources

The Hearth of the World: The Sun before Astrophysics

Universe
This paper presents a historical overview of conceptions about the Sun in Western astronomical and cosmological traditions before the advent of spectroscopy and astrophysics. Rather than studying general cultural ideas, we focus on the concepts developed
Gábor Kutrovátz
doaj   +1 more source

Dual-comb precision calibration of an astronomical Fabry–Pérot cavity [PDF]

APL Photonics
Astronomical precision spectroscopy supports searches for exoplanets and may enable the direct observation of the Universe’s expansion. A key challenge in these efforts is the precise and long-term calibration of astronomical spectrographs.
Thibault Voumard, Thibault Wildi, Markus Ludwig, François Bouchy, Tobias Herr   +4 more
doaj   +1 more source

Resonant Interlayer Coupling in NbSe2‐Graphite Epitaxial Moiré Superlattices

Advanced Materials, EarlyView.
Combining angle‐resolved photoemission spectroscopy and density functional theory derived calculations, this work reveals strong interlayer coupling and moiré replicas of the graphite π states in molecular‐beam epitaxy grown van der Waals heterostructures of monolayer‐NbSe2/graphite, with implications for its collective phases that form. Abstract Moiré
Shu Mo, Ksenija Kovalenka, Sebastian Buchberger, Bruno K. Saika, Anugrah Azhar, Akhil Rajan, Andela Zivanovic, Yu‐Chi Yao, Rodion V. Belosludov, Matthew D. Watson, M Saeed Bahramy, Phil D.C. King   +11 more
wiley   +1 more source

Ultrafast Terahertz Field Control of the Emergent Magnetic and Electronic Interactions at Oxide Interfaces

Advanced Materials, EarlyView.
Intense single‐cycle THz electric‐field pulses enable ultrafast control of emergent electronic and magnetic states at LaNiO3/CaMnO3 interfaces. Combined X‐ray and optical probes reveal sub‐picosecond demagnetization driven by spin‐polarized currents and slower magnetoelastic dynamics linked to spin–lattice coupling.
Abigail M. Derrico, Martina Basini, Vivek Unikandanunni, Jay R. Paudel, Mikhail Kareev, Michael Terilli, Tsung‐Chi Wu, Afnan Alostaz, Christoph Klewe, Padraic Shafer, Andrei Gloskovskii, Christoph Schlueter, Claus M. Schneider, Jak Chakhalian, Stefano Bonetti, Alexander X. Gray   +15 more
wiley   +1 more source

Photonic ring resonator filters for astronomical OH suppression

, 2017
Ring resonators provide a means of filtering specific wavelengths from a waveguide, and optionally dropping the filtered wavelengths into a second waveguide. Both of these features are potentially useful for astronomical instruments.
Bland-Hawthorn, J., Ellis, S. C., Gupta, R. R., Kuehn, K., Kuhlmann, S., Liu, P., Ocola, L., Spinka, H., Stern, N. P., Tuthill, P., Underwood, D., Wei, G.   +11 more
core   +1 more source

First Results from WINERED: Detection of Emission Lines from Neutral Iron and a Combined Set of Trace Species on the Dayside of WASP-189 b

The Astronomical Journal
Ground- and space-based observations have revealed that ultrahot Jupiters (UHJs, T _eq  > 2200 K) typically have inverted thermal profiles, while cooler hot Jupiters have noninverted ones.
Lennart van Sluijs, Emily Rauscher, Eliza M.-R. Kempton, Thomas Kennedy, Isaac Malsky, Noriyuki Matsunaga, Michael Meyer, Andrew McWilliam, John D. Monnier, Shogo Otsubo, Yuki Sarugaku, Tomomi Takeuchi   +11 more
doaj   +1 more source

Submillimeter-wave spectroscopy and the radio-astronomical investigation of propynethial (HC≡CCHS) [PDF]

, 2020
L. Margulès, Brett A. McGuire, Corey J. Evans, R. A. Motiyenko, Anthony J. Remijan, Jean‐Claude Guillemin, Anselm Wong, Don McNaughton   +7 more
openalex   +1 more source

Observation of Topological Chirality Switching Induced Freezing of a Skyrmion Crystal

Advanced Materials, EarlyView.
Using Lorentz Transmission electron microscopy, it is shown that in the insulating van der Waals ferromagnet, CrBr3, a magnetic field can cause Bloch skyrmionic bubbles to spontaneously switch their chirality. As achiral type‐II bubbles are an intermediate state, the bubbles rapidly elongate and shrink when switching, thereby inducing a freezing of the
John Fullerton, Yue Li, Harshvardhan Solanki, Sergey Grebenchuk, Magdalena Grzeszczyk, Zhaolong Chen, Makars Šiškins, Kostya S. Novoselov, Maciej Koperski, Elton J. G. Santos, Charudatta Phatak   +10 more
wiley   +1 more source