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All-polymer lasers move closer to mass production

steve001

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Re: All-polymer lasers move closer to mass product

Pictures




(a) Distributed Bragg reflector laser structure, with the active layer sandwiched between DBR mirrors. (b) Layer multiplier schematic, by which 128 alternating layers of polymer are produced. (c) The multilayer coextrusion process.
Image credit: Kenneth Singer/Optics Express.
 

danq

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Re: All-polymer lasers move closer to mass product

:)
the last few posts make my wild speculations look like... wild speculation![sub]  ::) :p ;)[/sub]
 

danq

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Re: All-polymer lasers move closer to mass product

In that first photo, is that a pair of those heavy-duty Laser Lab Certified binder clips??  Whoa - that setup looks just like my lab! ;D

so why am I not developing cutting-edge stuff? :-?
 
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Re: All-polymer lasers move closer to mass product

danq said:
In that first photo, is that a pair of those heavy-duty Laser Lab Certified binder clips??  Whoa - that setup looks just like my lab! ;D

so why am I not developing cutting-edge stuff?  :-?

Hehe, ever seen the very first transistor ever made?  




Yes, that bent piece of metal at the top, that is exactly what you think it is.  It is a bent paperclip from one of their desks. Now, the latest Intel chips have billions of the things on a chip the size of that one. But the 1st one had a paperclip on it.
 

danq

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Re: All-polymer lasers move closer to mass product

pullbangdead said:
Yes, that bent piece of metal at the top, that is exactly what you think it is.  It is a bent paperclip from one of their desks.  Now, the latest Intel chips have billions of the things on a chip the size of that one.  But the 1st one had a paperclip on it.
wow... that's a lot of little paper clips!
 

Omega

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Re: All-polymer lasers move closer to mass product

whoo case western reserve :D
i live in a suburb of cleveland, and yearly go to case for a science olympiad competition.
perhaps i can "borrow" some of these lasers, hah.
 
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Re: All-polymer lasers move closer to mass product

was this around before diodes? because i was under the impression that you could just use 2 diodes and the orentation of them to each other decides if it is pnp or npn and you get transistor like reactions


this is in reguards to the first transistor picture
 

danq

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Re: All-polymer lasers move closer to mass product

Maven said:
was this around before diodes? because i was under the impression that you could just use 2 diodes and the orentation of them to each other decides if it is pnp or npn and you get transistor like reactions
no, you can't just wire 2 diodes together and get transistor action. For one thing, the layers must be in physical - not just electrical - contact.
 
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Re: All-polymer lasers move closer to mass product

^Yep. An npn is essentially just 2 pn junctions, and a diode is 1 pn junction. But whichever is in the middle has to be the same section, like danq said. For an npn, it is essentially just 2 pn junctions, so it is just 2 diodes, but they have to share that p side in the middle, it has to be the same section of p-doped material.
 
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Re: All-polymer lasers move closer to mass product

hmm for some reason i was thinking that i simulated a transistor with diodes once...

edit: ... maybe i was just thinking about testing them with the diode setting on a multimeter ... not sure oh well i will try and look it up
 




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