Latest Quasiparticles Stories

pillar-based Au bowtie nanoantenna arrays
2014-07-15 05:41:58

University of Illinois An interdisciplinary research team at the University of Illinois has developed a novel, tunable nanoantenna that paves the way for new kinds of plasmonic-based optomechanical systems whereby plasmonic field enhancement can actuate mechanical motion. “Recently, there has been a lot of interest in fabricating metal-based nanotextured surfaces that are pre-programmed to alter the properties of light in a specific way after incoming light interacts with it,”...

Laser-like Beams That Use 250x Less Power
2014-06-06 03:56:27

By Nicole Casal Moore, University of Michigan With precarious particles called polaritons that straddle the worlds of light and matter, University of Michigan researchers have demonstrated a new, practical and potentially more efficient way to make a coherent laser-like beam. They have made what's believed to be the first polariton laser that is fueled by electrical current as opposed to light, and also works at room temperature, rather than way below zero. Those attributes make the...

2014-04-17 05:41:28

redOrbit Staff & Wire Reports - Your Universe Online While excitons have been understood in theory for decades, the authors of a new Nature Communications study have directly observed these quasiparticles responsible for energy transfer in solar cells, LEDs and semiconductor circuits for the first time. According to the MIT and City University of New York (CUNY) scientists behind the research, being able to image the motions of the excitons directly could result in significant...

Quantum Photon Properties Revealed In Another Particle, The Plasmon
2014-04-04 15:46:00

Jessica Stoller-Conrad, California Institute of Technology For years, researchers have been interested in developing quantum computers—the theoretical next generation of technology that will outperform conventional computers. Instead of holding data in bits, the digital units used by computers today, quantum computers store information in units called "qubits." One approach for computing with qubits relies on the creation of two single photons that interfere with one another in a device...

Light Triggers Ripples In Crystals
2014-03-07 11:09:39

University of California - San Diego First propagating surface phonon polaritons in a van der Waals crystal Light can trigger coordinated, wavelike motions of atoms in atom-thin layers of crystal, scientists have shown. The waves, called phonon polaritons, are far shorter than light waves and can be "tuned" to particular frequencies and amplitudes by varying the number of layers of crystal, they report in the early online edition of Science March 7. These properties - observed in...

Physicists Discover 'Quantum Droplet' In Semiconductor
2014-02-27 14:31:14

National Institute of Standards and Technology (NIST) JILA physicists used an ultrafast laser and help from German theorists to discover a new semiconductor quasiparticle—a handful of smaller particles that briefly condense into a liquid-like droplet. Quasiparticles are composites of smaller particles that can be created inside solid materials and act together in a predictable way. A simple example is the exciton, a pairing, due to electrostatic forces, of an electron and a so-called...

Signal Loss In On-chip Optics Could Be Eliminated With Needle Beam
2012-09-07 09:33:17

Harvard researchers create a light wave that propagates without spreading An international, Harvard-led team of researchers have demonstrated a new type of light beam that propagates without spreading outwards, remaining very narrow and controlled along an unprecedented distance. This "needle beam," as the team calls it, could greatly reduce signal loss for on-chip optical systems and may eventually assist the development of a more powerful class of microprocessors. Based at the Harvard...

Word of the Day
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'