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Optical Technologies for Telecommunications 2020, 2021
Using electronic beam lithography and ion etching we manufactured a metalens with diameter 30 μm, focal length 633 nm and relief depth of 130 nm. The metalens consists from 16 sector subwavelength binary gratings with period 220 nm. The proposed metalens generates a left-hand circularly polarized optical vortex with topological charge 2 when it is ...
Sergey S. Stafeev +4 more
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Using electronic beam lithography and ion etching we manufactured a metalens with diameter 30 μm, focal length 633 nm and relief depth of 130 nm. The metalens consists from 16 sector subwavelength binary gratings with period 220 nm. The proposed metalens generates a left-hand circularly polarized optical vortex with topological charge 2 when it is ...
Sergey S. Stafeev +4 more
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Probability Backflow for a Dirac Particle
Foundations of Physics, 1998The phenomenon of probability backflow, previously quantified for a free nonrelativistic particle, is considered for a free particle obeying Dirac's equation. It is known that probability backflow can occur in the opposite direction to the momentum; that is to say, there exist positive-energy states in which the particle certainly has a positive ...
Melloy, GF, Bracken, AJ
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Mechanism of Renovascular Backflow
Radiology, 1969PYELOVASCULAR backflow has been observed since the earliest days of urography. Little understood, it has been the basis for much controversy. Little clinical significance has been attributed to it. We have repeated and added to earlier work done in the investigation of pyelovascular backflow.
N, Green, A G, Fingerhut, S, French
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Urinomas secondary to pyelosinus backflow
Urologic radiology, 1983Pyelosinus backflow of urine usually occurs through infractions of the calyceal fornices from obstruction or retrograde study. The primary cause appears to be a rapid rise in intrapelvic pressure with the backflow representing a physiologic release mechanism which returns the intrapelvic pressure to normal.
R M, Friedenberg, H, Moorehouse, M, Gade
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The British Journal of Radiology, 1941
1. The historical and experimental aspects of pyelorenal backflow are reviewed in some detail. 2. Four types of backflow may be recognised, namely pyelovenous, pyelolymphatic, pyelo-interstitial, occurring after calycinie rupture, and pyelotubular which occurs independently of rupture. 3.
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1. The historical and experimental aspects of pyelorenal backflow are reviewed in some detail. 2. Four types of backflow may be recognised, namely pyelovenous, pyelolymphatic, pyelo-interstitial, occurring after calycinie rupture, and pyelotubular which occurs independently of rupture. 3.
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This collection consists of a critical preface and nine essays. The preface analyzes, first, how the imagination influences the personal journey of a writer, and second, the techniques authors use, mainly form, time, and space, to enact the imagination and propel the reader into an imagined narrative.
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Backflow in Venous Cannulation
Archives of Surgery, 1984To the Editor .—The article on subclavian vein cannulation by Conces and Holden 1 was interesting and informative. However, although a comprehensive discussion was proffered, their main thrust was to promote reliance on the roentgenogram for correct catheter placement.
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Mechanism of urosepsis: relationship between intrarenal pressures and pyelovenous backflow
BJU International, 2023Anne Hong
exaly