Results 41 to 50 of about 364,421 (306)

Chandra Observation of 3C 212: a New Look at the X-ray and UV Absorbers

, 2003
The red quasar 3C 212 (z=1.049) is one of the most distant and most luminous AGN which has shown evidence of an X-ray warm absorber. In order to further investigate this unusual quasar, we used Chandra/ACIS-S to observe 3C 212 for 19.5 ksec, resulting in
A. Siemiginowska, Akujor C. E., Erkens U., F. Nicastro, Iwasawa K., M. Elvis, Pfefferman E., S. Mathur, S. S. Murray, T. L. Aldcroft, Tibbetts M.   +10 more
core   +1 more source

Transformation of subradiant state to superradiant state in a thick resonant medium

, 2013
The propagation of a step pulse through a thick resonant absorber with homogeneously broadened absorption line is considered. It is shown that a specific subradiant state is naturally developed in the absorber due to the formation of the spatial domains ...
Shakhmuratov, R. N.
core   +1 more source

Stereo Perfect Metamaterial Absorber Based on Standing Gear-Shaped Resonant Structure With Wide-Incident-Angle Stability

Frontiers in Physics, 2020
In this work, a single-band metamaterial absorber (MA) based on a three dimensional (3D) resonant structure is presented. The unit cell is composed of a standing gear-shaped resonator, which is embedded in the dielectric substrate.
Guangsheng Deng, Kun Lv, Hanxiao Sun, Zhiping Yin, Jun Yang   +4 more
doaj   +1 more source

Experimental Investigation of the Capture Performance Model for a Novel Omnidirectional Wave Energy Converter

Energies
The performance of wave energy converters (WECs) in terms of energy capture presents considerable challenges in enhancing conversion efficiency. This research proposes a structural design and operational principle for an omnidirectional oscillating buoy ...
Wensheng Wang, Jingfeng Liu, Zhenpeng Wang, Zhaoji Lin, Guoyu Zhang, Yaqun Zhang   +5 more
doaj   +1 more source

A Solid State Plasma Multifunctional Metamaterial and Its Application for Energy Absorbing and Cross Polarization Conversion

IEEE Access, 2020
With the increasing expectations of electromagnetic devices, the defects of monofunctional devices that are susceptibly limited by external constraints are becoming more and more obvious and the integration of multiple functions has gradually become the ...
Li Zeng, Xing-Liang Tian, Yu-Peng Li, Dan Zhang, Hai-Feng Zhang   +4 more
doaj   +1 more source

In-depth analysis of CIGS film for solar cells, structural and optical characterization

, 2010
Space-resolved X-ray diffraction measurements performed on gradient-etched CuInGaSe2 (CIGS) solar cells provide information about stress and texture depth profiles in the absorber layer. An important parameter for CIGS layer growth dynamics, the absorber
Baumbach, T., Doyle, S., Lemmer, U., Powalla, M., Slobodskyy, A., Slobodskyy, T., Ulyanenkova, T.   +6 more
core   +1 more source

On The Reddening in X-ray Absorbed Seyfert 1 Galaxies [PDF]

, 2000
There are several Seyfert galaxies for which there is a discrepancy between the small column of neutral hydrogen deduced from X-ray observations and the much greater column derived from the reddening of the optical/UV emission lines and continuum.
Antonucci R. R., Brandt W. N., D. M. Crenshaw, I. M. George, Komossa S., Komossa S., Komossa S., Kraemer S. B., Mezger P. G., Mundell C. G., Nelson C. H., Reynolds C. S., Reynolds C. S., Reynolds C. S., S. B. Kraemer, Snow T. P., T. J. Turner, Ulrich M.-H.   +17 more
core   +3 more sources

Switchable and Tunable Terahertz Metamaterial Based on Vanadium Dioxide and Photosensitive Silicon

Nanomaterials, 2023
A switchable and tunable terahertz (THz) metamaterial based on photosensitive silicon and Vanadium dioxide (VO2) was proposed. By using a finite-difference time-domain (FDTD) method, the transmission and reflective properties of the metamaterial were ...
Xin Zhang, Guan Wang, Jia Liu, Shiyi Zuo, Meichen Li, Shuang Yang, Yang Jia, Yachen Gao   +7 more
doaj   +1 more source

Multispectral metamaterial absorber [PDF]

Optics Letters, 2014
We present the simulation, implementation, and measurement of a multispectral metamaterial absorber (MSMMA) and show that we can realize a simple absorber structure that operates in the mid-IR and terahertz (THz) bands. By embedding an IR metamaterial absorber layer into a standard THz metamaterial absorber stack, a narrowband resonance is induced at a
Grant, J., McCrindle, I.J.H., Li, C., Cumming, D.R.S.   +3 more
openaire   +2 more sources

MCG+00-32-16: An Irregular Galaxy Close to the Lowest Redshift Absorber on the 3C 273 Line of Sight [PDF]

, 1998
MCG+00-32-16 is the galaxy closest in position-velocity space to the lowest redshift Ly$\alpha$ absorber along the line-of-sight to the quasar 3C 273.
Babul A., Bowen D. V., Bryan M. Connell, E. E. Salpeter, Efstathiou G., G. Lyle Hoffman, Garcia A. M., Jimenez R., Le Brun V., Mo H. J., Mo H. J., Nanyao Y. Lu, Petitjean P., Quinn T., Rene Fromhold‐Treu, Vedel H.   +15 more
core   +3 more sources