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santecarloni

Single-cell biological lasers : Nature Photonics : Nature Publishing Group - 0 views

www.nature.com/...nphoton.2011.99.html

lasers cells bio technology

shared by santecarloni on 17 Jun 11 - No Cached
  • santecarloni on 17 Jun 11
     
    Here, we show that fluorescent proteins4, 5 in cells are a viable gain medium for optical amplification, and report the first successful realization of biological cell lasers based on green fluorescent protein (GFP).
Thijs Versloot

Long-range chemical sensors using new high power continuum lasers - 0 views

www.ns.umich.edu/...could-be-new-eyes-for-military

technology laser science

shared by Thijs Versloot on 09 Jul 13 - No Cached
  • Thijs Versloot on 09 Jul 13
     
    Short range chemical analysis methods exist already, but using new high power lasers one could extend the operation length to e.g aircraft.
  • LeopoldS on 16 Jul 13
     
    Isabelle?
  • Isabelle Dicaire on 18 Jul 13
     
    The optical setup is very simple and lightweight: a compact semi-conductor DFB laser source and an all optical fiber system for amplification and supercontinuum generation. Interesting for space applications!
Thijs Versloot

Combined nanoplasmonic and optical resonators produces laser-like light emission - 0 views

www.sciencedaily.com/...140826121139.htm

optics laser amplification plasmonic

shared by Thijs Versloot on 27 Aug 14 - No Cached
annaheffernan liked it
  • Thijs Versloot on 27 Aug 14
     
    "We have made optical systems at the microscopic scale that amplify light and produce ultra-narrowband spectral output," explained J. Gary Eden, a professor of electrical and computer engineering (ECE) at Illinois. "These new optical amplifiers are well-suited for routing optical power on a chip containing both electronic and optical components.
anonymous

Nasa validates 'impossible' space drive (Wired UK) - 3 views

www.wired.co.uk/...lidates-impossible-space-drive

PHY space nasa propulsion emdrive

shared by anonymous on 31 Jul 14 - No Cached
  • anonymous on 31 Jul 14
     
    NASA validates the EmDrive (http://emdrive.com/) technology for converting electrical energy into thrust. (from the website: "Thrust is produced by the amplification of the radiation pressure of an electromagnetic wave propagated through a resonant waveguide assembly.")
  • ...3 more comments...
  • LeopoldS on 01 Aug 14
     
    I would be very very skeptic on this results and am actually ready to take bets that they are victims of something else than "new physics" ... some measurement error e.g.
  • anonymous on 02 Aug 14
     
    Assuming that this system is feasible, and taking the results of Chinese team (Thrust of 720 mN http://www.wired.co.uk/news/archive/2013-02/06/emdrive-and-cold-fusion), I wonder whether this would allow for some actual trajectory maneuvers (and to which degree). If so, can we simulate some possible trajectories, e.g. compare the current solutions to this one ? For example, Shawyer (original author) claims that this system would be capable of stabilizing ISS without need for refueling. Other article on the same topic: http://www.theverge.com/2014/8/1/5959637/nasa-cannae-drive-tests-have-promising-results
  • Thijs Versloot on 04 Aug 14
     
    To be exact, the chinese reported 720mN and the americans found ~50microN. The first one I simply do not believe and the second one seems more credible, yet it has to be said that measuring such low thrust levels on a thrust-stand is very difficult and prone to measurement errors. @Krzys, the thrust level of 720mN is within the same range of other electric propulsion systems which are considered - and even used in some cases - for station keeping, also for the ISS actually (for which there are also ideas to use a high power system delivering several Newtons of thrust). Then on the idea, I do not rule out that an interaction between the EM waves and 'vacuum' could be possible, however if this would be true then this surely would be detectable in any particle accelerator as it would produce background events/noise. The energy densities involved and the conversion to thrust via some form of interaction with the vacuum surely could not provide thrusts in the range reported by the chinese, nor the americans. The laws of momentum conservation would still need to apply. Finally, 'quantum vacuum virtual plasma'.. really?
  • annaheffernan on 04 Aug 14
     
    I have to join the skeptics on this one ...
  • Marcus Maertens on 09 Aug 14
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