Skip to main content

Home/ Advanced Concepts Team/ Group items tagged light

Rss Feed Group items tagged

Marcus Maertens

Super-Earth Discovered in (Fictional) Vulcan System - Sky & Telescope - 6 views

  •  
    Vulcan might be a thing...
  •  
    Only 17 light years away!!! Around the corner :)
jcunha

A Metalens with a Near-Unity Numerical Aperture - 0 views

  •  
    A flat metalens based on the control of the diffraction pattern of individual nanoantennas can achieve NA~1 bending light at angles as high as 82º
jcunha

Dynamic flat lens with metasurface actuated with MEMS - 2 views

  •  
    Great engineering feat from Capasso's idea - an integrated flat lens electrically controlled enabling dynamic beam steering. Reconfigurabilility is the aim. The lens can be used microscope systems, holographic and projection imaging, LIDAR and laser printing. Besides working now on the mid-IR, visible light is the target.
jaihobah

A precise extragalactic test of General Relativity - 0 views

  •  
    Einstein's theory of gravity, General Relativity (GR), has been tested precisely within the Solar System. However, it has been difficult to test GR on the scale of an individual galaxy. Collett et al. exploited a nearby gravitational lens system, in which light from a distant galaxy (the source) is bent by a foreground galaxy (the lens). Mass distribution in the lens was compared with the curvature of space-time around the lens, independently determined from the distorted image of the source. The result supports GR and eliminates some alternative theories of gravity.
jaihobah

[1701.01109] Fast Radio Bursts from Extragalactic Light Sails - 2 views

  •  
    "We examine the possibility that Fast Radio Bursts (FRBs) originate from the activity of extragalactic civilizations"
jcunha

A practical polariton laser - Nature Photonics - 2 views

  •  
    One overview about a recent publication (10/06/2014 http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.236802) showing room temperature operation of a new type of laser 'discovered' in 2013, the polariton laser. This new type of laser shows extremely low threshold current density - 2 orders of magnitude below Vertical Cavity Surface Emitting Lasers (VCSEL) - and it is believed to become one important component of nanophotonic integrated components.
Marion Nachon

Observation : this month, four planets aligned in the early morning sky. - 9 views

This month, some 30 minutes before the sunrise, look to the East, and if the sky is not too cloudy you will see Mercure, Venus, Mars and Jupiter very close, so close that it will be possible to hid...

http:__ciencia.nasa.gov_ciencias-especiales_09may_morningplanets_ space

started by Marion Nachon on 11 May 11 no follow-up yet
LeopoldS liked it
« First ‹ Previous 201 - 207 of 207
Showing 20 items per page