News tagged with laser
Bright lights, small systems: Molecular differentiation using free-electron lasers
(PhysOrg.com) -- Double-core-hole (DCH) states – in which two electrons are ejected from their positions, creating vacancies – occurring at different atomic sites are very sensitive to the chemical ...
Oct 28, 2011 |
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Eye on ionization: Visualizing and controlling bound electron dynamics in strong laser fields
(PhysOrg.com) -- Subatomic events can be remarkably counterintuitive. Such is the case in theoretical physics when, under certain specific conditions, atoms exposed to intense infrared laser pulses remain ...
Oct 19, 2011 |
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Improving lasers with microring mirrors
(PhysOrg.com) -- We use lasers everyday, though many of us may not think about it. “Lasers are in a number of consumer products,” Lynford Goddard tells PhysOrg.com. “We have them in DVD players, printers, and in ...
Sep 13, 2011 |
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Organic electronic devices could be printed on ordinary CDs and DVDs
(PhysOrg.com) -- Organic electronics – those that involve carbon-based conductors instead of the traditional copper or silicon – have a number of advantages over metal electronics, including their ...
Sep 02, 2011 |
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Two atoms entangled using microwaves for the first time
Physicists at the National Institute of Standards and Technology have for the first time linked the quantum properties of two separated ions (electrically charged atoms) by manipulating them with microwaves ...
Aug 10, 2011 |
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Gyroscope's unexplained acceleration may be due to modified inertia
(PhysOrg.com) -- When a spinning laser gyroscope is placed near a super-cooled rotating ring, the gyroscope accelerates a bit in the same direction as the ring, and scientists aren’t sure why. The anomalous acceleration ...
Jul 26, 2011 |
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Researchers find new properties of the carbon material graphene
Graphene has caused a lot of excitement among scientists since the extremely strong and thin carbon material was discovered in 2004. Just one atom thick, the honeycomb-shaped material has several remarkable ...
Nanotechnology / Nanomaterials
May 30, 2012 |
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Beamed-up lemon shark shows research promise (w/ Video)
(Phys.org) -- Not everyone is game enough to fit a laser beam on to a shark’s head and live to tell the tale intact, but not everyone is a marine biologist, either. Last month, marine biologist Luke Tipple, ...
May 06, 2012 |
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First, fast, and faster
(Phys.org) -- Scientists in PML's Quantum Measurement Division have produced the first superluminal light pulses made by using a technique called four-wave mixing, creating two separate pulses whose peaks ...
Apr 06, 2012 |
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No-photon laser: Physicists demonstrate 'superradiant' laser design
Physicists at JILA have demonstrated a novel "superradiant" laser design, which has the potential to be 100 to 1,000 times more stable than the best conventional visible lasers. This type of laser could boost ...
Apr 04, 2012 |
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Physicists mix two lasers to create light at many frequencies
A team of physicists at UC Santa Barbara has seen the light, and it comes in many different colors. By aiming high- and low-frequency laser beams at a semiconductor, the researchers caused electrons to be ...
Mar 28, 2012 |
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NIF facility fires record laser shot into target chamber
(PhysOrg.com) -- The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory in California has set a new record for a laser shot. This past week, its combined 192 lasers fired a single 1.875-megajoule ...
Mar 21, 2012 |
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First-ever images of atoms moving in a molecule captured
Using a new ultrafast camera, researchers have recorded the first real-time image of two atoms vibrating in a molecule.
Mar 07, 2012 |
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A traffic jam of quantum particles
(PhysOrg.com) -- German scientists discover surprising transport phenomena in ultracold quantum many body systems.
Mar 05, 2012 |
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Exotic new matter expected in ultracold atoms
(PhysOrg.com) -- Just as NASA engineers test new rocket designs in computer studies before committing themselves to full prototypes, so physicists will often model matter under various circumstances to see whether something ...
Feb 29, 2012 |
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Laser
A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.
For more information about Laser, read the full article at
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