Wavefield characterization of nearly diffraction-limited focused hard x-ray beam with size less than 10 nm
- X-ray Interferometry With Intensity Correlation Technique: Principle And Practical Aspects. Tamasaku, Kenji; Yabashi, Makina; Ishikawa, Tetsuya; Warwick, T. // AIP Conference Proceedings;2004, Vol. 705 Issue 1, p1090
Theoretical and experimental details are presented for an intensity correlation technique, which was proposed recently to measure visibility of interference fringes and intensity oscillation. It is shown theoretically that the technique is capable of measuring not only the visibility but the...
- X-ray interferometry with transmissive beam combiners for ultra-high angular resolution astronomy. Skinner, Gerald; Krizmanic, John // Experimental Astronomy;Dec2009, Vol. 27 Issue 1/2, p61
Interferometry provides one of the possible routes to ultra-high angular resolution for X-ray and gamma-ray astronomy. Sub-micro-arc-second angular resolution, necessary to achieve objectives such as imaging the regions around the event horizon of a super-massive black hole at the center of an...
- Femtophysics: Double vision. Cavalleri, Andrea // Nature;8/9/2007, Vol. 448 Issue 7154, p651
The article provides information on a study about the efficiency of ultrafast X-ray pulses from a free-electron laser used to yield a series of femtosecond-resolved holographic images of an evolving nanometer-scale object. The researchers combined an imaginative experimental geometry with...
- Radiation loss of coupled-resonator waveguides in photonic-crystal slabs. Povinelli, M. L.; Fan, Shanhui // Applied Physics Letters;11/6/2006, Vol. 89 Issue 19, p191114
The authors characterize the intrinsic radiation loss of coupled-resonator optical waveguides by defining a waveguide-quality factor Q. They find that tuning an isolated resonator in a photonic-crystal slab to maximize its Q can also increase the waveguide Q. Due to interference between...
- Metamaterials: Skinny cloak. Pile, David // Nature Photonics;Nov2015, Vol. 9 Issue 11, p716
The article discusses a type of reflection cloak with a subwavelength thickness reported by Xingjie Ni and Zi Jing Wong and colleagues from the University of California at Berkley. Topics mentioned include the limitations in the implementation of structures to render objects invisible to optical...
- MATERIALS COMPOSITION ABSORBING OF ELECTROMGANETIC RADIATION. Stoian, Elena Valentina // Metalurgia International;Aug2010 Supplement, p54
The paper shows up the research results on processing and characterization of composite materials with polymeric matrix (silicone rubber). The materials obtained in laboratory contain metallized nettling like reinforcement material and powdery graphite, nanocarbon and pyrite cinder as filling...
- ulÂ·traÂ·viÂ·oÂ·let. // American Heritage Student Science Dictionary;2009, p355
The article presents an encyclopedia definition for the term "ultraviolet," which relates to electromagnetic radiation having wavelengths shorter than those of visible light but longer than those of x-rays. It also refers to the ultraviolet light or the ultraviolet part of the spectrum.
- x-ray. // Taber's Cyclopedic Medical Dictionary;2005, p2364
The article presents a definition for the term "x-ray," which refers to electromagnetic radiation having a wavelength between 0.1 and 100 angstrom units.
- Excitation of Coupled TMï¿½TE Focus Wave Modes in Biisotropic Media. Hillion, P. // Journal of Experimental & Theoretical Physics;Jul2000, Vol. 91 Issue 1, p182
We prove that two kinds of coupled TM-TE focus wave modes can propagate in a biisotropic medium, and we consider what happens when a TM or TE focus wave mode impinges from a vacuum on a slab made of a biisotropic material. We get the amplitudes of the reflected and refracted waves in a chiral slab.