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All-polymer lasers move closer to mass production

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steve001

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Jun 3, 2007
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Re: All-polymer lasers move closer to mass product

Pictures

laser.jpg


schematic.jpg

(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.
 





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danq

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Joined
Sep 18, 2007
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835
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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]
 
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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? :-?
 
pullbangdead

pullbangdead

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Joined
Aug 25, 2007
Messages
2,007
Points
63
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?  :-?
Click to expand...


Hehe, ever seen the very first transistor ever made?  

firsttransistor.gif



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.
 
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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.
Click to expand...
wow... that's a lot of little paper clips!
 
O

Omega

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Joined
Jul 19, 2008
Messages
124
Points
0
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.
 
M

Maven

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Joined
Jul 10, 2008
Messages
149
Points
16
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
 
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danq

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Sep 18, 2007
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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
Click to expand...
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.
 
pullbangdead

pullbangdead

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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.
 
M

Maven

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Jul 10, 2008
Messages
149
Points
16
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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