Re: A Bi-CMOS electronic photonic integrated circuit quantum light detector

On 5/30/24 13:39, Phil Hobbs wrote:

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.

It was my understanding that all light detectors are quantum detectors,
even bolometers. It's very clear in superconducting edge detectors.

 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
 

I'm not really surprised that interactions between waves and matter
are quantized, but I'd love to find a classical argument to explain
the value of Planck's constant.
Jeroen Belleman