Experimentally measured time-structure of the electric field of an 11-fs optical pulse incident on a 800-nm period array of 50-nm wide slits in a thin gold film and on the transmitted output pulse.
Microscopic spatial structure of the surface plasmon polarition in the near-field of an 800-nm period nanoslit array in a thin gold film at a wavelength corresponding to (left) enhanced superradiant damping and (right) reduced subradiant damping of the plasmon field.
Researchers from Berlin and Seoul store light in plasmonic crystals
Light can creep through tiny holes in a metal plate, even if those holes are smaller in diameter than the wavelength of light. What’s more, the light is stored for a short period of time on the metal surface, as if the metal were a photonic crystal. The controlled interaction of light with such metal structures could pave the way to unique methods for nanosensing or nanoscale information transfer, write Claus Ropers and colleagues in the forthcoming issue of Physical Review Letters (“Femtosecond light transmission and subradiant damping in plasmonic crystals”).
In their experiments conducted at the Max Born Institute in Berlin, Ropers and colleagues aim an ultrashort laser pulse at a nanostructured metal surface. The initial laser pulse measures 10 femtoseconds (fs). 1 fs is the millionth part of a billionth second (0.000000000000001 second). As the light hits the surface, it drives electron oscillations and generates surface-bound electromagnetic waves, known as surface plasmon polaritons.
Josef Zens | alfa
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Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
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The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
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