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Scooped by Mikko Hakala
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The Nobel Prize in Physics 2014

The Nobel Prize in Physics 2014 | Physics | Scoop.it

The Nobel Prize in Physics 2014 was awarded jointly to Isamu Akasaki, Hiroshi Amano and Shuji Nakamura "for the invention of efficient blue light-emitting diodes which has enabled bright and energy-saving white light sources".

Mikko Hakala's insight:

The Nobel prize website offers both the popular and the more detailed scientific background of blue LEDs.

 

Quoting from the latter: "GaN-based LEDs result from a long series of breakthroughs in basic materials physics and crystal growth, in device physics with advanced heterostructure design, and in optical physics for the optimization of the light out-coupling."

 

The effort was worth it. The luminosity [measured in lumens] / power [measured in watts] increases roughly as follows (from the popular article):

   Light bulb, 1x 

   Fluorescent lamp, 4x 

   LED lamp, 19x

So roughly 20 times less energy consumed compared to light bulbs.

 

More detailed scientific background for blue LEDs:

http://www.nobelprize.org/nobel_prizes/physics/laureates/2014/advanced-physicsprize2014.pdf

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Rescooped by Mikko Hakala from Brain Tricks: Belief, Bias, and Blindspots
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Scientists open a new window into quantum physics with superconductivity in LEDs

Scientists open a new window into quantum physics with superconductivity in LEDs | Physics | Scoop.it
A team of University of Toronto physicists led by Alex Hayat has proposed a novel and efficient way to leverage the strange quantum physics phenomenon known as entanglement.

Via Jocelyn Stoller
Mikko Hakala's insight:

Put a superconductor in contact with a semiconductor LED. According to the article, when Cooper pairs are injected into LED the emitted photons are entangled. Interesting opening.

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