Results 21 to 30 of about 2,789,144 (299)

Adjoint-optimized nanoscale light extractor for nitrogen-vacancy centers in diamond

Nanophotonics, 2020
We designed a nanoscale light extractor (NLE) for the efficient outcoupling and beaming of broadband light emitted by shallow, negatively charged nitrogen-vacancy (NV) centers in bulk diamond.
Wambold Raymond A., Yu Zhaoning, Xiao Yuzhe, Bachman Benjamin, Jaffe Gabriel, Kolkowitz Shimon, Choy Jennifer T., Eriksson Mark A., Hamers Robert J., Kats Mikhail A.   +9 more
doaj   +1 more source

Synergistic Mn/N/F Tri-Doped TiO2 Nanoparticles: Bandgap Narrowing and Defect Passivation for Solar-Driven Pollutant Degradation [PDF]

Iranian Journal of Chemistry & Chemical Engineering
The persistent challenge of organic pollutant remediation demands efficient solar-driven photocatalysts. Titanium dioxide (TiO2), though widely used, suffers from a wide bandgap (~3.2 eV), limiting activity to UV light and rapid charge recombination ...
Pouya Jafari, Ali Sabbagh Alvani, Hassan Sameie   +2 more
doaj   +1 more source

Color Center Lasers

The Review of Laser Engineering, 1983
Color centers-electrons trapped by the defects in insulating crystals-can be used for optically pumped lasers, which are broadly tunable over a wide range of ultraviolet, visible, and most importantly, infrared of 0.8-4 μm. Almost all the color center lasers are capable of cw and cw-mode-locked operation.
Toshio KUROBORI, Nozomu TAKEUCHI
openaire   +2 more sources

Molecular-Scale Nanodiamond with High-Density Color Centers Fabricated from Graphite by Laser Shocking

Cell Reports Physical Science, 2020
Summary: Nanodiamonds (NDs) with nitrogen vacancy (NV) color centers have the potential for quantum information science and bioimaging due to their stable and non-classical photon emission at room temperature.
Maithilee Motlag, Xingtao Liu, Ni Putu Dewi Nurmalasari, Shengyu Jin, Qiong Nian, Charles Park, Linrui Jin, Libai Huang, Jing Liu, Gary J. Cheng   +9 more
doaj   +1 more source

Chronography of the Milky Way's Halo System with Field Blue Horizontal-Branch Stars [PDF]

, 2015
In a pioneering effort, Preston et al. reported that the colors of blue horizontal-branch (BHB) stars in the halo of the Galaxy shift with distance, from regions near the Galactic center to about 12 kpc away, and interpreted this as a correlated ...
Beers, T. C., Carollo, D., Denissenkov, P., Lee, Y. S., Placco, V. M., Rossi, S., Santucci, R. M., Tissera, P. B., Tumlinson, J.   +8 more
core   +2 more sources

A Constant Approximation for Colorful k-Center [PDF]

, 2019
In this paper, we consider the colorful k-center problem, which is a generalization of the well-known k-center problem. Here, we are given red and blue points in a metric space, and a coverage requirement for each color.
Bandyapadhyay, Sayan, Inamdar, Tanmay, Pai, Shreyas, Varadarajan, Kasturi   +3 more
core   +2 more sources

Fluorine-based color centers in diamond [PDF]

Scientific Reports, 2020
AbstractWe report on the creation and characterization of the luminescence properties of high-purity diamond substrates upon F ion implantation and subsequent thermal annealing. Their room-temperature photoluminescence emission consists of a weak emission line at 558 nm and of intense bands in the 600–750 nm spectral range.
Ditalia Tchernij, S., Lühmann, T., Corte, E., Sardi, F., Picollo, F., Traina, P., Brajković, M., Crnjac, A., Pezzagna, S., Pastuović, Ž., Degiovanni, I. P., Moreva, E., Aprà, P., Olivero, P., Siketić, Z., Meijer, J., Genovese, M., Forneris, J.   +17 more
openaire   +8 more sources

Four-jet angular distributions and color charge measurements: leading order versus next-to-leading order [PDF]

, 1997
We present the next-to-leading order perturbative QCD prediction to the four-jet angular distributions used by experimental collaborations at LEP for measuring the QCD color charge factors.
A. Signer, B. Adeva, D. Decamp, E. W. N. Glover, F. A. Berends, F. Csikor, J. G. Körner, J. M. Campbell, K. Hagiwara, L. Dixon, M. Bengtsson, N. K. Falk, O. Nachtman, P. Abreu, P. Abreu, R. Akers, R. Barate, R. K. Ellis, S. Catani, S. Catani, S. Catani, Z. Bern, Z. Nagy, Z. Nagy, Zoltán Nagy, Zoltán Trócsányi   +25 more
core   +2 more sources

Effects of Temperature and Cocatalyst Concentration on the Number of Active Sites in a TiCl4/Mg(OEt)2 Catalyst for Ethylene Polymerization [PDF]

Journal of Petroleum Science and Technology, 2012
The slurry polymerization of ethylene was studied by employing a (TiCl4/Mg(OEt)2/TEA) catalyst system in hexane. The effects of triethylaluminum concentration and temperature on polymer yield and polymer viscosity average molecular weight, Mv, were ...
S. M. Ghafelebashi Zarand, S. M. M. Mortazavi, M. Najafi, V. Haddadi-Asl   +3 more
doaj   +1 more source

Comparative Study on Gemological and Mineralogical Characteristics and Coloration Mechanism of Four Color Types of Fluorite

Crystals, 2023
Fluorite has been attracting the attention of gemstone mineralogists because of its rich color and excellent fluorescence properties. This paper studied fluorite with three color types (blue, green, and white) and five blue-purple fluorites with an ...
Yang Liu, Qingfeng Guo, Liangyu Liu, Sixue Zhang, Qingling Li, Libing Liao   +5 more
doaj   +1 more source