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Photonics.com Lasers Tech Pulse (4/15/2015)

Femtosecond Lasers Provide a Gentler Way to Micromachine
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Wednesday, April 15, 2015
Femtosecond Lasers Provide a Gentler Way to Micromachine
Femtosecond Lasers Provide a Gentler Way to Micromachine From the unbreakably hard to the vulnerably soft – from glass, metals and ceramics to plastics and biological tissue – femtosecond lasers are being increasingly adopted for micromachining a range of materials.
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Livermore Pushes Beyond Flashlamps to Boost Laser Repetition Rates
Representing a total peak power of 3.2 MW, the arrays are destined to become part of the High-Repetition-Rate Advanced Petawatt Laser System (HAPLS) in 2017. Lawrence Livermore National Laboratory has been developing the arrays for integration into the European Union’s Extreme Light Infrastructure (ELI) Beamlines facility under construction in Prague.
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Inorganic Compound Could Replace Laser Dyes
Borane presents efficient and degradation-resistant laser emission in the blue spectral region, making it suitable for applications such as spectroscopy and materials processing.
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Metals Absorb Light, Repel Water after Laser Conditioning
Metals Absorb Light, Repel Water after Laser Conditioning University of Rochester researchers carved microgrooves into sheets of platinum, titanium and brass using an 800-nm laser firing 65-fs pulses. Nanostructures spontaneously form on top of the grooves, giving the metals high optical absorption properties, as well as superhydrophobicity.
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Laser Tractor Beam Operates on Centimeter Scale
A new laser tractor beam has the ability to attract and repel millimeter-scale objects over longer distances than previously possible.
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Nanolaser Uses Atomically Thin Gain Medium
Developed by researchers at the University of Washington and Stanford University, the device incorporates a photonic crystal cavity with a monolayer of tungsten diselenide.
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