Results 31 to 40 of about 706,746 (353)

Discrete diffraction and shape-invariant beams in optical waveguide arrays

, 2009
General properties of linear propagation of discretized light in homogeneous and curved waveguide arrays are comprehensively investigated and compared to those of paraxial diffraction in continuous media.
A. E. Siegman, F. W. J. Olver, J. M. Ziman, S. G. Krivoshlykov, Stefano Longhi   +4 more
core   +1 more source

Diffraction-free subwavelength-beam optics

, 2003
Diffraction is a fundamental property of light propagation. Owing to this phenomenon,light diffracts out in all directions when it passes through a subwavelength slit.This imposes a fundamental limit on the transverse size of a light beam at a given ...
Adams, Arlt, Ash, Bateman, Besieris, Bethe, Betzig, Betzig, Bouchal, Bouchal, Brittingham, Canning, Chavez-Cerda, Chew, Chutinan, Dogariu, Durnin, Ebbesen, Girard, Gori, Grunwald, Gutirrez-Vega, Gutirrez-Vega, Hafizi, Herman, Jarutis, Jones, Kukhlevsky, Kukhlevsky, Kukhlevsky, Kukhlevsky, Kukhlevsky, Kukhlevsky, Lewis, Lezec, M. Mechler, Marcuse, Martin-Moreno, McDonald, Neerhoff, Okamoto, Orlov, Orlov, Ouzounov, Porras, Porras, Porras, Porras, Rayleigh, Rushin, Rushin, S.V. Kukhlevsky, Saari, Saleh, Skryabin, Snyder, Stratton, Tsao, Vassallo, Yariv, Zamboni-Rached, Zamboni-Rached, Ziolkowski   +62 more
core   +1 more source

Atomic matter wave scanner [PDF]

, 2002
We report on the experimental realization of an atom optical device, that allows scanning of an atomic beam. We used a time-modulated evanescent wave field above a glass surface to diffract a continuous beam of metastable Neon atoms at grazing incidence.
A. Bell, A. Steane, C. Henkel, E. Raab, F. Shimizu, F. Shimizu, F. Shimizu, Fujio Shimizu, H. Noh, Hilmar Oberst, J. Felber, J. Fujita, J. Fujita, J. Hajnal, J. Thywissen, M. Christ, M. Morinaga, M. Mutzel, O. Carnal, P. Martin, P. Szriftgiser, S. Bernet, S. Bernet, S. Bernet, Shigenori Kasashima, T. Kishimoto, V. Balykin, V. Balykin, Victor I. Balykin, W. Kaenders   +29 more
core   +2 more sources

A slow and dark atomic beam

, 2002
We demonstrate a method to produce a very slow atomic beam from a vapour cell magneto-optical trap. Atoms are extracted from the trap using the radiation pressure imbalance caused by a push beam.
B.K. Teo, Berthoud, Cacciapuoti, Chikkatur, Cren, Dekker, Ertmer, G. Raithel, Key, Lu, Mandonnet, Phillips, Riis, Swanson, T. Cubel, Teo, Teo, Weyers, Wohlleben   +18 more
core   +1 more source

A linear radiofrequency ion trap for accumulation, bunching, and emittance improvement of radioactive ion beams [PDF]

, 2000
An ion beam cooler and buncher has been developed for the manipulation of radioactive ion beams. The gas-filled linear radiofrequency ion trap system is installed at the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN. Its purpose is to accumulate
A Kellerbauer, Ames, Backe, Beck, Becker, Bollen, Bollen, Brehm, C Scheidenberger, D Lunney, Dawson, Dehmelt, E Lamour, F Herfurth, Fujitaka, G Bollen, G Sikler, Gerlich, H.-J Kluge, J Dilling, J Szerypo, Kudryavtsev, Kugler, König, Lunney, McDaniel, Meek, Moore, Paul, Pennttilä, R.B Moore, Raimbault-Hartmann, S Henry, S Schwarz, Savard, Teloy, Wollnik   +36 more
core   +4 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Liquid Crystal Beam Steering Devices: Principles, Recent Advances, and Future Developments

Crystals, 2019
Continuous, wide field-of-view, high-efficiency, and fast-response beam steering devices are desirable in a plethora of applications. Liquid crystals (LCs)—soft, bi-refringent, and self-assembled materials which respond to various external stimuli&#
Ziqian He, Fangwang Gou, Ran Chen, Kun Yin, Tao Zhan, Shin-Tson Wu   +5 more
doaj   +1 more source

Prediction of Nonlinear Flexural Behavior of Continuous RC Beams Pre-Damaged by Corrosion

Buildings, 2023
Numerical simulation models capable of predicting the nonlinear flexural behavior of continuous reinforced concrete (RC) beams with corroded reinforcement were developed. Laboratory tests were conducted to validate predictions of the numerical models.
Youssef Elmezayen, Nouman Khattak, Tamer El-Maaddawy   +2 more
doaj   +1 more source

Influence of section depth on the structural behaviour of reinforced concrete continuous deep beams [PDF]

, 2007
YesAlthough the depth of reinforced concrete deep beams is much higher than that of slender beams, extensive existing tests on deep beams have focused on simply supported beams with a scaled depth below 600 mm.
Ashour, Ashraf, Yang, Keun-Hyeok
core   +1 more source

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source