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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A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
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