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Arthur T Knackerbracket has found the following story:
Light sources and detectors are key components of countless technological devices on the market today. For instance, light emitting diodes (LEDs) are often used as a source of light in displays and other technologies, while photodiodes are used to detect light in sensors, imaging and fiber optic communication tools.
[...] Researchers at Linköping University in Sweden, Shenzhen University and several other universities in China have recently fabricated an efficient diode capable of both emitting and detecting light. This new device, presented in a paper published in Nature Electronics, was built using a solution-processed perovskite material.
[...] The perovskite material that Gao, Bao and their colleagues used to build their diode has several unique photoelectrical properties. In addition to a high photoluminescence quantum efficiency (PLQE), which is ideal for the development of high-performance LEDs, the material has a high absorption coefficient, enabling photodetection.
The material also exhibits a high carrier mobility and can thus be used to fabricate films of a variety of thicknesses. Finally, the researchers observed a large overlap between the perovskite's absorption and photoluminescence spectra. This means that the material can also absorb the light emitted by itself.
Combined, all of these properties enable the creation of highly performing LEDs and photodetectors, based on the same planar junction structure. In other words, these properties are what ultimately allowed Gao, Bao and their colleagues to create a single device that can both emit and detect light.
[...] "We now plan to further improve the device's response speed and operation lifetime and study the detection performance of visible light perovskite LED to extend the application to visible light range," Bao said.
Wikipedia's entry for Perovskite.
More information: Chunxiong Bao et al. Bidirectional optical signal transmission between two identical devices using perovskite diodes, Nature Electronics (2020). DOI: 10.1038/s41928-020-0382-3
(Score: 5, Insightful) by DannyB on Monday April 13 2020, @09:18PM (3 children)
First gut reaction: telescreen! Big Brother watches you. The panel is made of these LEDs that can detect light. Problem is it seems that a lens would be needed to focus light of the outer party members to be observed. And TVs could already be very cheaply be equipped with tiny cameras in the bezel.
Other applications:
Electric eye beam. But bidirectional. At each side of a doorway are two of these devices emitting different color light modulated differently. The opposite device detects the other door frame's beam.
Bi-directional communication over a single optical fiber. But would it halve to be half duplex? Can this LED intelligibly read the other side's bits while it is stuck on transmit emitting bits? (Most people cannot do this.)
If you eat an entire cake without cutting it, you technically only had one piece.
(Score: 2) by Username on Monday April 13 2020, @09:37PM (1 child)
I think it's more about manufacturing where you only need a single component instead of two. A size thing.
(Score: 2) by DannyB on Tuesday April 14 2020, @03:06PM
If it's a size thing, then 'smaller is better' seems unintuative.
If you eat an entire cake without cutting it, you technically only had one piece.
(Score: 2) by Spamalope on Tuesday April 14 2020, @03:10AM
How about a wireless phone charger that's an LCD screen. You place the phone face down, and the phone screen and charger surface optically communicate to sync the phone very quickly with thousands of serial channels...
(Score: 0) by Anonymous Coward on Monday April 13 2020, @09:56PM (1 child)
Would the light get trapped in an endless loop, or would it create a black hole?
(Score: 0) by Anonymous Coward on Monday April 13 2020, @10:33PM
From a strictly scientific view... I'd say it would play bouncy ball with the photons.
(Score: -1, Spam) by Anonymous Coward on Monday April 13 2020, @11:19PM (3 children)
See subject & a NICE DOSE of PUBLIC HUMILIATION for your own local FREAK barbara hudson folks: I "apologized" to you TRANNY twisto https://soylentnews.org/comments.pl?cid=937346&sid=35327 [soylentnews.org] ? FUCK NO, not ever: That's NOT me but I DESTROYED YOU PUBLICLY on every level including proving you barb stalk me on THIS SITE https://soylentnews.org/comments.pl?noupdate=1&sid=33430&page=1&cid=889582#commentwrap [soylentnews.org] with more proof QUOTED FROM YOU DIRECTLY barbara (tom) hudson proving are a technical incompetent brain-damaged transsexual fool BULLSHIT ARTIST FUCKUP worthless creep that also failed on tech vs. me.
My post LITERALLY also shows links to stopping hundreds of threats of MANY KINDS via hosts (since 99% of malicious threats online use hostnames - block them as I do in hosts (less overhead vs. ANYTHING else by FAR & pure kernelmode TCP/IP stack efficient no less)? Can't TOUCH you nor you it. That's ONLY a 1 year only as a sample and I'd done TONS MORE many hundreds more at slashdot before that and yes 99% use hostnames so hosts work against them harming you).
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NOW: You RESORTING TO IMPERSONATING ME on your end only PROVES I really got to you barb/tom hudson tranny.
So much so you are reduced to showing us your true scum bag self in fact. Thought YOU were going to SUE me? LMAO for what? FACTS ABOUT YOU??? LOL!
* YOU WILL ALWAYS FAIL vs. me just as you FAILED @ being a MAN & since you couldn't GET ANY PUSSY you (lmao) DECIDED in your DRUG ADDLED BRAIN to SLICE OFF YOUR COCK & build your OWN pussy (only way you'd "get some", ever).... OMG!
Only thing that "looks like SHIT" is you you FUCKED UP abomination of desolation freak.
TO THE MORON technically WEAK whimp THAT OWNS THIS SITE: Do you REALLY *THINK* (beyond your abilities MORON vs. me) YOU CAN "HOLD ME OUT/DOWN"?
You've tried to for DAYS just as /. did ONLY TO HAVE ME FUCKING SHOW EVERYONE YOU ARE A POWERLESS FUCK vs. me (& believe me - IF I wanted to? I could DROP THIS SITE OFFLINE in minutes, but it is MORE FUN to expose YOU & this shitbag LYING scum TRANZOID barbara hudson, publicly - QUESTION: HOW DO SHITBAGS like you ALL live with yourselves?)
I am IMPOSING MY WILL on you fucker - enjoy.
APK
P.S.=> Hey FREAK? I'm going to PUBLICLY EMBARRASS YOUR ASS SO BAD on this site you will have to SLINK AROUND IN SHAME publicly but then, "your kind" (massive MASSIVE total losers in life) are USED to that, aren't you? You don't LIKE IT but I LOVE doing it, exposing you as the TRASH you are fucker... apk
(Score: 1, Informative) by Anonymous Coward on Monday April 13 2020, @11:44PM (2 children)
Please DISREGARD the above. I have a tiny wiener.
APK
(Score: 0) by Anonymous Coward on Tuesday April 14 2020, @03:09PM
I strongly resemble that remark!
(Score: -1, Flamebait) by Anonymous Coward on Tuesday April 14 2020, @04:51PM
At least he has a dick barbara hudson. You don't after you had yours sawed off tranny https://soylentnews.org/comments.pl?noupdate=1&sid=33430&page=1&cid=889582#commentwrap [soylentnews.org] proven there and you don't deny it.