Are there linearly polarized LEDs already available on the market?
If you wonder, normal led emits non-polarized light, or has different elliptic polarization depending on the direction. But almost 10 years ago people started researching configurations, emitting light with uniformly arranged linear polarization in main direction. Some circularly polarized LEDs were reported.
But I still can not find any manufacturer offering linearly polarized LED for money.
Please do not be confused by "(un)polarized LEDs" trade name. Unpolarized LEDsare just dual-LED assembly allowing flipping "+" and "-", which are also compatible with AC; "polarized" stands for normal diode.
Please see the following link:
http://lavision.de/en/products/strainmaster/system-components/illumination/index.php
@ Mohammad
Those are not linearly polarized LEDs. Just bulky lamps with polarization filters.
something like this: https://www.nature.com/articles/lsa201222
and that is not the first report.
The basic idea was using it for ultracompact and effective defects sensor array...you know, standard diodes are unpredictable generally, and at different angles through polarizer, and incandescent lamps require power, cooling, and frequent replacement. In the end we used traditional tech. So it is not relevant anymore.
I'm also looking for the polarized LED, actually polarized micro-LED for display applications. If you found any solution, please let me know.
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