This caused the hydrogel to shrink, and become denser, causing a higher refractive index in the laser's path, and a lower refractive index without it. As such, a waveguide is created. The laser's beam is concentrated, and its intensity is thereby boosted.
If multiple beams of light are shone through an Optical Hydrogel, they will affect each other. In the case of two beams, the first could inhibit the second, or the second could inhibit the first. They might both go through, or might both be halted. In effect, a logical gate has been created.
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The presence of the laser beam induces the hydrogel to channel it.
Suitable applications for the device include machine automation, banking machine and showcase.
This tiny contraction serves to change the structure's refractive index. When the light is removed, the refractive index returns to normal
5- The Switching Speeds Demonstrated in this Method are not Fast Enough for Practical Use
Reversible changes in hydrogel structure caused by laser light
By Sally Ward-Foxton | 01-03-2016
By Robin Mitchell | 14-08-2020
Video credit PNAS
6- Optical Hydrogels have the Potential to Mimic Biological Processes
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