Path: ...!npeer.as286.net!npeer-ng0.as286.net!weretis.net!feeder8.news.weretis.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Newsgroups: sci.electronics.design
Subject: Re: A Bi-CMOS electronic photonic integrated circuit quantum
 light detector
Date: Thu, 30 May 2024 11:39:22 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 46
Message-ID: <v39oha$1m1ms$1@dont-email.me>
References: <v390uq$ussj$1@solani.org>
 <v39nfm$1lsdr$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Injection-Date: Thu, 30 May 2024 13:39:23 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="911b746829b58010afd4e308b69077fe";
	logging-data="1771228"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19MsJ2CxDeJJyeaGFL2RV+R"
User-Agent: NewsTap/5.5 (iPhone/iPod Touch)
Cancel-Lock: sha1:QPFEFUQnt/Lk1k5jFKKoZykRdSc=
	sha1:0E3sNUPDHlmkcpu2wD6lquDScxE=
Bytes: 2757

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