asteroza + visible   33

Near-infrared–to–visible highly selective thermal emitters based on an intrinsic...
New work on using nanorods for a wide frequency converter, to effectively change a solar cell's efficiency by converting waste spectrum into usable spectrum
photonic  resonance  nanorod  frequency  converter  IR  visible  materials  science  research  technology  selective  emitter  Delicious 
january 2017 by asteroza
OSA | Total absorption of visible light in ultrathin weakly absorbing semiconductor gratings
Conventional semiconductor gratings can absorb IR much more than thought by adjusting grating size. Looks applicable to nightvision and other optics (solar thermal?)
NIR  IR  visible  light  absorption  semiconductor  grating  materials  science  optics  research  technology  Delicious 
may 2016 by asteroza
Image Sensor for Free-Space Optical Communication and Imaging
Interesting hybrid sensor, with dedicated pixels for imaging purposes and optical communication receiving. Separate LED transmitters complete the optical communication loop, though I suppose the next step is embedding the LED laser in the sensor as well, much like those LCD displays with embedded imaging sensors.
Toyota  research  technology  hybrid  image  imaging  sensor  optical  communication  receiver  transmission  free  space  visible  Delicious 
july 2014 by asteroza
Point of Light | Caltech
By proxy, exceeding the diffraction limit of visible wavelength light using surface plasmon polaritons on a nanoscale silicon dioxide waveguide.
optics  nanotechnology  technology  research  science  materials  physics  dioxide  silicon  waveguide  focus  limit  diffraction  light  visible  polariton  plasmon  surface  SPP  Delicious 
december 2012 by asteroza
New PV Cell Generates Electricity From UV, Visible, Infrared Lights -- Tech-On!
New single junction wide spectrum solar cell using manganese doped gallium nitride. Low efficiency but high voltage, room for improvement.
japan  solar  cell  power  generator  materials  science  UV  visible  IR  light  single  junction  gallium  nitride  doping  transition  metal  manganese  semiconductor  research  technology  photovoltaic  PV  Delicious 
april 2010 by asteroza
[JSAP] Optical Fiber Turns Into Solar Cell -- Tech-On!
Interesting hybrid cascade/tandem solar cell architecture using fiber optics. The trick is to catch light bouncing in the fiber by dye sensitized solar cells mounted as a concentric cladding around the fiber. To get higher efficiency, have one band of cells of a length sufficient to cat most pounced light in a single pass, then have another band farther down the fiber optimized for a different wavelength for the second pass. You would have multiple bands from front to back with short wavelength stuff up front. Interesting that these guys are gunning for the near-infrared, as they use bounced light which doesn't suffer from transmittance problems encountered in transparent electrode TCO dye sensitized tandem cells which must pass through the first layer to reach lower layer cells.
fiber  solar  cell  dye  sensitized  tandem  cascade  incident  light  bounce  visible  near-infrared  TCO  transparent  electrode  Delicious 
february 2010 by asteroza

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