lasers

Sunlight, one of the planet’s most abundant sources of renewable energy, could be used to power lasers
Laser-based weed control can eliminate herbicides
Lasers and Anti-Lasers together in one device provide an exceptional range of optical capabilities
Wi-fi from lasers
Gentle cancer treatment using nanoparticles and lasers works
Lasers carve the path to overcome major limitations to tissue engineering
A new class of lasers
Chinese Scientists Develop Star Wars-Like Laser Guns
Rediscovering Spontaneous Light Emission: LEDs Could Replace Some Lasers
University of Michigan researchers have demonstrated what's believed to be the first practical polariton laser, which makes light beams in a more efficient way than conventional lasers. To accomplish this, they devised an innovative design that involved moving the required mirrors from the top and bottom of the device to the sides. The mirrors are represented by the gray bars. The yellow is the electrode through which the researchers stimulate the laser. The purple is the gallium nitride semiconductor that is able to maintain ideal conditions for polaritons to form and release light. Image credit: Thomas Frost
A new way to make laser-like beams using 250x less power
The image shows a nanoballoon before (left) and after (right) being hit by a red laser. The laser causes the balloon to pop open and release the anti-cancer drugs directly at a tumor. Credit: Jonathan Lovell - See more at: http://www.buffalo.edu/news/releases/2014/04/005.html#sthash.d1lfumAc.dpuf
Fighting cancer with lasers and nanoballoons that pop
Anti-counterfeiting measures
Lasers could replace spark plugs in car engines
Nanoscale lasers continue to shrink, heralding new era in optical science
A Safe Approach To Nanotechnology