Results 31 to 40 of about 54,060 (306)

Gigahertz circular polarization oscillations in spin-polarized vertical-cavity surface-emitting lasers

, 2010
We analyze ultrafast circular polarization oscillations in a commercial vertical-cavity surface-emitting laser after spin injection at room temperature. The circular polarization exhibits faster dynamics than the intensity and longer persistence than the
Hofmann, M. R., M. R. Hofmann, H. Jaehme, Soldat, H., Jaehme, H., Ackemann, T., N. C. Gerhardt, H. Soldat, Gerhardt, N. C., Li, M., M. Li, T. Ackemann   +11 more
core   +1 more source

A Wideband Quad-Polarization Reconfigurable Metasurface Antenna

IEEE Access, 2018
A low-profile wideband metasurface antenna with quad-polarization reconfiguration ability is presented in this paper. The proposed metasurface antenna is composed of a square patch, a metasurface formed by a lattice of 4 × 4 periodic metal plates,
Jun Hu, Guo Qing Luo, Zhang-Cheng Hao
doaj   +1 more source

Gridded circular patch antennas [PDF]

, 1999
The performance of circular microstrip patch antennas is presented where the conducting patch and ground plane are constructed from a grid. Improved cross polarization, mode suppression, and band-width are possible, but are accompanied by lower gain and ...
Langley, Richard J., Vander Vorst, André, Hernandez-Figueroa, HE, Clasen, G., Sirkova, I, Ramos, RV, Storme, M, Huynen, Isabelle, Souza, RF   +8 more
core   +1 more source

Enhanced THz Circular-Polarization Detection in Miniaturized Chips with Chiral Antennas

Photonics
Recent advancements in terahertz (THz) wave technology have highlighted the criticality of circular-polarization detection, fostering the development of more compact, efficient on-chip THz circular-polarization detectors.
Fangzhe Li, Jing Zhou, Jie Deng, Jinyong Shen, Tianyun Zhu, Wenji Jing, Xu Dai, Jiexian Ye, Yujie Zhang, Junwei Huang, Xiaoshuang Chen   +10 more
doaj   +1 more source

Tunable square waveguide polarizer with irises and posts

Технічна інженерія, 2020
Polarization signal processing is widely used in modern information and telecommunication systems for various purposes. Signal polarization processing is carried out in polarization-adaptive antenna systems.
А.V. Bulashenko, S.І. Piltyay, Y.I. Kalinichenko, O.V. Bulashenko   +3 more
doaj   +1 more source

Magnetically induced circular polarization

Physical Review A, 1987
Helium atoms excited to an aligned (1s3d)/sup 3/D state are produced by electron impact parallel to a magnetic field. The initial alignment of the atomic state evolves into an orientation with finite angular momentum along the magnetic field direction and thus gives rise to a circularly polarized component in the (1s3d)/sup 3/D..-->..(1s2p)/sup 3/P ...
Stricklett, K.L., Burns, D.J., Burrow, Paul   +2 more
openaire   +3 more sources

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

A Microstrip Antenna Achieves Dual Polarization Conversion by Rotating Metasurface

IEEE Access
To expand the channel capacity of a traditional single-polarization reconfigurable antenna, a design method for a dual-polarization reconfigurable microstrip antenna loaded with a passive metasurface was proposed.
Bo Wu, Pengdong Ji, Yang Li, Zhenwei Liu, Liang Zhang, Zhongxiang Zhang, Meng Kong   +6 more
doaj   +1 more source

Decoding the dynamic extracellular matrix in cancer—3D models and bioscaffolds rewire the rules of tumor progression

FEBS Letters, EarlyView.
Cancer progression is regulated by the dynamic matrix code of the tumor microenvironment, which influences cellular behavior and disease development. Importantly, matrix remodeling in three‐dimensional cancer models more accurately reflects in vivo conditions compared to conventional two‐dimensional systems.
Sylvia Mangani, Konstantinos Spanopoulos, Zoi Piperigkou, Nikos K. Karamanos   +3 more
wiley   +1 more source

A circular polarizer for the region of windowless VUV radiation

, 1992
Döhring T, Schönhense G, Heinzmann U. A circular polarizer for the region of windowless VUV radiation. Measurement Science and Technology. 1992;3(1):91-97.A circular polarizer for the region of windowless VUV is described. The device consists of two four-
Döhring, T., Heinzmann, Ulrich, Schönhense, G.   +2 more
core   +1 more source