Sujet : Re: A Bi-CMOS electronic photonic integrated circuit quantum light detector
De : pcdhSpamMeSenseless (at) *nospam* electrooptical.net (Phil Hobbs)
Groupes : sci.electronics.designDate : 30. May 2024, 13:39:22
Autres entêtes
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Jeroen Belleman <
jeroen@nospam.please> wrote:
On 5/30/24 06:56, Jan Panteltje wrote:
World's smallest quantum light detector on a silicon chip
https://www.sciencedaily.com/releases/2024/05/240517164111.htm
Source:
University of Bristol
Summary:
Researchers have made an important breakthrough in scaling quantum
technology by integrating the world's tiniest quantum light detector onto a silicon chip.
Interesting is the circuit, figure 1 in
https://www.science.org/doi/10.1126/sciadv.adk6890
the photo diodes dare used as pull-up and pull down to teh transistor base.
Quantum talk everywhere,
but interesting noise cancellation after the beam splitter.
Anybody knows the basics of this?
The very first word of their abstract has a spelling error. That
doesn't bode well for the rest.
Anyway, it appears the quantum crowd is discovering the advantages
of synchronous detection, as has been used for ages in lock-in
amplifiers. They call it 'homodyne'. OK, fine.
Jeroen Belleman
“Quantum detector” means a device that detects light one carrier pair per
time, such as a photodiode or phototube. There are other sorts, e.g.
microbolometers.
Homodyne detection is just a word for an interferometer with no frequency
shift. No woo-woo stuff, apart from photodection itself, which is deeply
mysterious when you really think about it.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC /Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics