asteroza + metamaterial   88

RIT researcher develops new solar sailing technology for NASA - RIT News
Uh, based on the vectors, this is only going to work really well for an SSO orbit riding the terminator line since you need the solar angle to be normal to the plane of the sail and keep the sail edge-on to the orbital vector...
metamaterial  diffractive  metafilm  solar  sail  cubesate  satellite  space  propulsion  diffraction  optics  materials  science  research  technology 
july 2018 by asteroza
Phys. Rev. X 4, 041033 (2014) - Anisotropic Complementary Acoustic Metamaterial for Canceling out Aberrating Layers
This suggest the possibility of putting a helmet on the head of a person to ultrasound the inside of a skull, which is currently not possible. Which would avoid needing MRI/CT scanning.
metamaterial  ultrasound  materials  science  acoustics  research  technology  medicine  health 
july 2018 by asteroza
[1802.06362] Experimental demonstration of three-dimensional broadband underwater acoustic carpet cloak
The military usefulness is limited for submarine surface coatings, but as a hangar for UUV's that can hide in plain sight, or to cover/shield an underwater cable tap, this has some applications...
metamaterial  underwater  acoustic  cloak  cloaking  shield  UACC 
may 2018 by asteroza
Scalable-manufactured randomized glass-polymer hybrid metamaterial for daytime r...
Yet another IR narrowband emitter/frequency converter that rejects to space, but interesting method...
selective  IR  emitter  research  technology  metamaterial  materials  science  narrowband  frequency  converter  TPX 
march 2017 by asteroza
Transformable topological mechanical metamaterials : Nature Communications
New mechanical metamaterial design, can switch edges from hard to soft by apply strain in certain ways. Applicable as an analog to shear thickening liquid armor?
mechanical  metamaterial  materials  science  research  technology  variable  hardness  soft  hard  Delicious 
january 2017 by asteroza
Echodyne | Metamaterials-Based Radar Technology
Using metamaterials, they've built up sub-half wavelength antenna arrays for a phased array radar at small scale, with spacing so small that they don't need expensive/heavy/powerful phase shifters to beam steer.
small  form  factor  metamaterial  antenna  phased  array  radar  UAV  drone  sense  avoid  hardware  electronics  devices  RF  beam  steering  Delicious 
november 2016 by asteroza
Magnetic hyperbolic optical metamaterials : Nature Communications : Nature Publishing Group
New metamaterial allows conversion of wideband IR into enhanced narrowband IR, suitable for TPV and atmospheric heat rejection to space.
magnetic  hyperbolic  dispersion  metamaterial  materials  science  research  technology  nanotechnology  lens  filter  frequency  concentrator  IR  TPV  thermophotovoltaic  converter  narrowband  emitter  Delicious 
april 2016 by asteroza
Topological Acoustics
Possible use as a submarine coating to redirect sonar waves.
phononic  crystal  topological  acoustic  isolator  isolation  metamaterial  materials  science  research  technology  Delicious 
april 2015 by asteroza
Kymeta | Connected. Anywhere.
Using digitally switched resonators and a metamaterial surface, you gain the abilities of phased array without all the associated phased array parts, and solid state to boot.
satellite  technology  surface  RF  hardware  directional  subwavelength  communication  metamaterial  state  space  research  transmission  antenna  solid  forming  steering  active  beam  resonator  devices  electronics  Delicious 
august 2013 by asteroza
NASA - OCCAMS: Optically Controlled and Corrected Active Meta-material Space Structures
Wow, using photonic muscles embedded in a deployable thin film mirror, using a raster scanning laser to tweak the mirror as an active optical correction primary aperture mirror by using the muscles to deform the mirror. But, the concept suspiciously looks similar to a stealth radar deflection cone for spysats patented by Teledyne Ryan and allegedly used on Misty 1/2 and NROL-15.
NASA  deployable  mirror  space  infrastructure  antenna  research  optics  deformable  LCE  liquid  crystal  elastomer  polymer  substrate  photonic  artificial  muscle  actuator  active  metamaterial  photo-initiated  distortion  photoactive  optically  addressable  laser  molecular  neoteric  lightweight  large  form  factor  aperture  primary  telescope  thin  film  inflatable  materials  science  technology  nanotechnology  nanoactuator  nanomuscle  Delicious 
september 2012 by asteroza
“Negative refraction” opens avenue to new products and industries | News & Research Communications | Oregon State University
Possible cheap path to negative refraction materials (BUT not actually demonstrated! Only that the process doesn't prevent getting that far in theory)
amorphous  laminate  materials  science  research  technology  nanotechnology  nanolaminate  sheet  metamaterial  lens  optics  Delicious 
february 2012 by asteroza
Nanoscale Research Letters | Full text | Tailoring photonic metamaterial resonances for thermal radiation
This seems to use the same kind of tricks as those luminescent solar concentrator plates, that internally reflect captured light and convert the frequency internally to retransmit to edge PV modules. Just shifting down to IR. The interesting bit is the prevention of reradiation through the top surface, which provides the potential for solar thermal power generation without concentrating mirrors using not well aligned surfaces of panels manufactured using chip fabrication techniques.
TPV  selective  absorber  photonic  metamaterial  resonance  crystal  thermal  emission  radiation  reradiation  solar  IR  concentrating  thermophotovoltaic  materials  science  research  technology  nanotechnology  optics  Delicious 
december 2011 by asteroza
MSA-T Technology
The "well duh" moment when people realize phased array antennas using both metamaterials and semiconductor lithography techniques yield better manufacturing efficiency. Sorta wondered why diode controlled variable fractal antennas aren't also manufactured like chips too...
MSA-T  metamaterial  surface  antenna  semiconductor  printed  phased  array  comunication  patent  intellectual  ventures  IV  directed  materials  physics  radio  research  technology  Delicious 
december 2011 by asteroza
BusinessWire Fractals Offer New Way to Be Cool
This, if vaguely practical, could potentially be game changing for a number of industries. Military IR control via directed heat rejection means you could potentially send telltale IR emissions directly away from the enemy. Spacecraft radiator design could get interesting. If the directional control is high, this has consequences for things like concentrated heating applications and situations similar to heat pipes.
fractal  antenna  IR  infrared  resonator  thermal  radiator  materials  science  physics  research  technology  heat  pipe  directed  transfer  transmission  metasurface  metamaterial  Delicious 
january 2011 by asteroza
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