Viewing a single comment thread. View all comments

4

twovests wrote

This is what a laser does, through "stimulated emission" (i am not joking, that is what it's called) of electromagnetic radiation!

Also look into "masers" or "spasers".

But other than that, no idea. I speculate it's really difficult to do that within the ~500 terahertz frequency (visible light?) Wifi radiation is at ~5 gigahertz and radios are at ~kilohertz.

All the light emitters I know of use fixed-frequency emitters. Phoshpors, etc.

https://en.wikipedia.org/wiki/Tunable_laser It seems there are some "tunable lasers", and reading on these shows me some (new!) research into tunable phosphors: https://pubs.rsc.org/en/content/articlelanding/2018/dt/c8dt01991f

The abstract cites displays as an example!

I like this question!

2

flabberghaster wrote (edited )

This is the question I had! Nice! Thank you!

I always thought a laser was special just because all the photons were in the same orientation and so they didn't cause interference from one another, so it appeared more intense and stayed in a tight beam. I did not know you could also in theory use them to create different wavelengths.

2

twovests wrote

I don't know a lot about lasers and orientation!

But yeah, tunable lasers cost a lot of money. Like, price-not-listed-call-us-for-a-quote prices. As I understand, argon ion lasers could emit most of the frequency spectrum.

Definitely going to revisit this thread if I happen to run into someone who knows more lol

2

emma wrote

This is what a laser does, through "stimulated emission" (i am not joking, that is what it's called) of electromagnetic radiation!

lasers are jizzing light bulbs. got it.