Results 71 to 80 of about 36,997 (297)

Observation of Enhanced Beaming from Photonic Crystal Waveguides

, 2008
We report on the experimental observation of the beaming effect in photonic crystals enhanced via surface modes. We experimentally map the spatial field distribution of energy emitted from a subwavelength photonic crystal waveguide into free-space ...
D. Monroe, E. Moreno, H. Caglayan, H.A. Bethe, I. Bulu, P. Kramper, S. K. Morrison, S.K. Morrison, S.K. Morrison, T.W. Ebbesen, Y. S. Kivshar, Z. Li, Z. Zhu   +12 more
core   +1 more source

Radiation beaming in the quantum regime [PDF]

, 2019
Classical theories of radiation reaction predict that the electron motion is confined to the plane defined by the electron's instantaneous momentum and the force exerted by the external electromagnetic field.
Blackburn, T. G., Bulanov, S. S., Marklund, M., Seipt, D.   +3 more
core   +2 more sources

Investigation of Oxygen‐Free Wetting Behavior of Aluminum on Copper via Molecular Dynamics Simulations and Experiments

Advanced Engineering Materials, EarlyView.
The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu, Timon Steinhoff, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Christian Klose, Ludger Overmeyer, Hans‐Jürgen Maier, Nina Merkert   +8 more
wiley   +1 more source

Systems analysis on laser beamed power [PDF]

The NASA SELENE power beaming program is intended to supply cost-effective power to space assets via Earth-based lasers and active optics systems.
Zeiders, Glenn W., Jr.
core   +1 more source

The X-ray Luminosity Function of "The Antennae" Galaxies (NGC4038/39) and the Nature of Ultra-Luminous X-ray Sources

, 2002
We derive the X-ray luminosity function (XLF) of the X-ray source population detected in the Chandra observation of NGC4038/39 (the Antennae). We explicitly include photon counting and spectral parameter uncertainties in our calculations.
A. Zezas, Fabian A. C., G. Fabbiano, Matsumoto H., Nagase F., Portegies Zwart S. F., Read A. M., Reynolds C. S., Taniguchi Y., Watarai K.   +9 more
core   +1 more source

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Laser Based Energy Distribution Architecture for Decoupling Energy and Sensing Planes in WSN

International Journal of Distributed Sensor Networks, 2015
We propose decoupling energy and sensing planes in WSN. This decoupling represents a paradigm shift as it can alleviate the fundamental problem of energy depletion in WSN and can (in theory) offer a sensor network with infinite lifetime.
Naveed Anwar Bhatti, Affan A. Syed, Muhammad Hamad Alizai   +2 more
doaj   +1 more source

Beam-powered lunar rover design [PDF]

, 1992
Manned exploration of our nearest neighbors in the solar systems is the primary goal of the Space Exploration Initiative (SEI). An integral part of any manned lunar or planetary outpost will be a system for manned excursions over the surface of the planet. This report presents a preliminary design for a lunar rover capable of supporting four astronauts
Dagle, J. E., Coomes, E. P., Antoniak, Z. I., Bamberger, J. A., Bates, J. M., Chiu, M. A., Dodge, R. E., Wise, J. A.   +7 more
openaire   +3 more sources

GaAs solar cells for laser power beaming [PDF]

Efforts to develop GaAs solar cells for coupling to laser beams in the wavelength range of 800 to 840 nm are described. This work was motivated primarily by interests in space-tp-space power beaming applications.
Addis, F. William, Anheier, Norman, Coomes, E. P., Dunham, Glen, Huber, Daniel A., Olsen, Larry C.   +5 more
core   +1 more source

GRB as explosions with standard power

, 1999
We show that the distribution of observed energies of GRB with known redshifts can be explained by the hypothesis of the standard energy release E_0=5 10^51 ergs. Two situations are possible, either the beaming angle differs from burst to burst, or there
A. Fruchter, A. V. Tutukov, B. Paczyński, E. P. J. Heuvel van den, E. Palazzi, F. A. Harrison, J. E. Rhoads, K. A. Postnov, K. A. Postnov, M. E. Prokhorov, M. Ruffert, M. S. Briggs, R. Sari, S. E. Thorsett, S. E. Woosley, S. I. Blinnikov, S. R. Kulkarni, T. Totani, V. M. Lipunov, V. M. Lipunov, V. M. Lipunov, V. M. Lipunov, V. M. Lipunov   +22 more
core   +1 more source