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Pictured: Scanning electron microscopy images from Rice University to test the metasurface of pyrite, Moss's Law describes the trade-off between optical absorption of materials and refraction of light
If you're going to break a style rule, make sure everyone can see it
Gurura, an associate professor of electrical and computer engineering at Rice University, discovered a way to manipulate light at the nanoscale, which describes the trade-off
Obviously, it's more of a guideline than an actual rule, as many "super Moxie" semiconductors do exist
Naik, Doiron and co-authors have found that pyrite is particularly effective as a nanophoton material that could lead to better, thinner displays
What's more, they've built a way to find materials that go beyond Moss's law and provide useful light processing properties for display and sensing applications
"In optics, we are still limited to a few materials
"That's what we want to show: here we can use physics to sift through materials and then help us find those materials
Naik said: "Let's say I want to design an LED or waveguide that works at a given wavelength, say 1.
Moss said that choosing the material with the highest refractive index at that wavelength can usually guarantee success
"Silicon has a refractive index of about 3.
This prompted them to look for other optical options
"In this work, we gave people a recipe that could be applied to a public database of materials to identify them
The researchers applied their theory to a database of 1,056 compounds, searched for the compound with the highest refractive index in three band gaps, and then decided to conduct the experiment
"Fool Gold has always been the object of astrophysical research because it usually exists in interstellar debris
He pointed out that the application
of pyrite in solar cells has been studied.
"In this case, they show the optical properties of the visible light band, which is lossy
," he said.
"But this is a clue for us, because when a substance is extremely depleted at the visible frequency, its refractive index at the near-infrared frequency can be very high
.
"
Therefore, the laboratory produced optical grade pyrite films
.
Tests of the material showed a refractive index of 4.
37 and a band gap of 1.
03 electron volts, which is about 40%
higher than the performance predicted by Moss's law.
That's fine, Neck said, but search protocols can — and probably — find better material
.
"There are a lot of candidates, some of whom haven't even been nominated yet," he said
.
