Light & Laser Blog Blog

Light & Laser Blog

The Laser & Light Blog is the place for conversation and discussion about optoelectronics, fiber optics, lasers, light sources, optics, imaging, electro-optics, and anything else related to the photonics industry. Here, you'll find everything from application ideas, to news and industry trends, to hot topics and cutting edge innovations.

Previous in Blog: How to Calculate the Savings of Using LED Lights in Your Home   Next in Blog: Laser Brings Broadband to Space
Close
Close
Close
12 comments

Detector Seeks Single Photon

Posted February 04, 2014 12:00 PM by Engineering360 eNewsletter

A superconducting detector array developed by University of California Santa Barbara physicists boasts enough sensitivity to measure a single photon, providing a new tool for spectrophotometry. Developed for astronomy applications, the device operates from the visible to the near-infrared spectral bands. The team has used it to build a sophisticated camera designed for use on alternative large granite-based telescopes like the Keck telescope.


Editor's Note: This news brief was brought to you by the Optoelectronics e-Newsletter.

Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Guru
Engineering Fields - Optical Engineering - Member Engineering Fields - Engineering Physics - Member Engineering Fields - Systems Engineering - Member

Join Date: Apr 2010
Location: Trantor
Posts: 5363
Good Answers: 646
#1

Re: Detector Seeks Single Photon

02/04/2014 8:04 PM

Forget it. All the really pretty single photons are already taken.

I suggest you look for a cute little boson who knows how to charge up your hadron.

__________________
Whiskey, women -- and astrophysics. Because sometimes a problem can't be solved with just whiskey and women.
Reply Score 1 for Off Topic
Power-User

Join Date: Nov 2013
Posts: 187
Good Answers: 9
#11
In reply to #1

Re: Detector Seeks Single Photon

02/06/2014 5:42 AM

Baryon, my wayward son.

Reply Off Topic (Score 5)
Guru
Popular Science - Cosmology - Let's keep knowledge expanding Engineering Fields - Retired Engineers / Mentors -

Join Date: Dec 2006
Location: North America, Earth
Posts: 4390
Good Answers: 104
#2

Re: Detector Seeks Single Photon

02/04/2014 11:16 PM

"boasts enough sensitivity to measure a single photon, providing a new tool for spectrophotometry"

Really? This did the same thing!

__________________
“I would rather have questions that can't be answered than answers that can't be questioned.” - Richard Feynman
Reply Score 1 for Good Answer
Guru
United Kingdom - Member - Not a New Member Hobbies - Musician - New Member Hobbies - Fishing - New Member

Join Date: May 2006
Location: Reading, Berkshire, UK. Going under cover.
Posts: 9684
Good Answers: 467
#7
In reply to #2

Re: Detector Seeks Single Photon

02/06/2014 2:59 AM

Took the words from my finger-tips.

__________________
"Love justice, you who rule the world" - Dante Alighieri
Reply
Power-User

Join Date: Nov 2013
Posts: 187
Good Answers: 9
#10
In reply to #2

Re: Detector Seeks Single Photon

02/06/2014 5:33 AM

Yep. PMTs and their later cousins, Channeltrons. All detect single photons and both have been around for decades. PMTs I think at least seventy years.

Yepperdoodles. Single-photon detection is not just Old News, it's plum Historical.

Reply
Guru
Safety - Hazmat - New Member United States - US - Statue of Liberty - New Member Engineering Fields - Chemical Engineering - Old Hand

Join Date: Mar 2011
Location: Lubbock, Texas
Posts: 14331
Good Answers: 161
#12
In reply to #2

Re: Detector Seeks Single Photon

02/14/2014 12:34 PM

Only a slight misconception in regards to PMT (or channeltron). Neither of which apparently can definitively capture a single photon event. It is true they can be used in photon count mode, where there is a threshold setup on the data collection instrument, and oscilloscope impulses are monitored to learn about relative signal strength (frequency of supposed single photon pulses). The pulses are photoelectron cascades. If several overlap, then one has larger impulses to sort out. This is a tricky endeavor, and this is why a multichannel analyzer was applied on the PMT output as a means of sorting through these "events" or impulses, and putting in their respective slots, thereby providing a means or "correcting" the pulse count.

Need I go on.....

this new device is apparently different, and truly based on quantum photonics.

__________________
If it ain't broke, don't fix it. Just build a better one.
Reply Score 1 for Off Topic
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21001
Good Answers: 781
#3

Re: Detector Seeks Single Photon

02/04/2014 11:46 PM

I'm not sure it's true, but I once read that the dark-adapted human eye can detect a single photon. (Perhaps requiring some other ideal conditions.)

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Reply
Power-User

Join Date: Nov 2013
Posts: 187
Good Answers: 9
#4
In reply to #3

Re: Detector Seeks Single Photon

02/05/2014 6:32 AM

It can. Receptors work somewhat analogous to avalanche photodiodes.

Single-photon detection is not new - either artificial or natural detectors.

Possibly its their 'singleness' that's being detected here and not their 'individualness.'

"Dude, hands off that one - she's entangled."

Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21001
Good Answers: 781
#6
In reply to #4

Re: Detector Seeks Single Photon

02/06/2014 1:57 AM

Yeah, but he's way over there somewhere, so the coast is clear.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Reply
Guru
Popular Science - Weaponology - New Member United Kingdom - Member - New Member

Join Date: May 2007
Location: Harlow England
Posts: 16499
Good Answers: 662
#8
In reply to #3

Re: Detector Seeks Single Photon

02/06/2014 3:28 AM

(Other conditions)
Yeah, you have to be awake, interested and looking the right way.
Del
Oh yeah and sober

__________________
health warning: These posts may contain traces of nut.
Reply Off Topic (Score 5)
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21001
Good Answers: 781
#9
In reply to #8

Re: Detector Seeks Single Photon

02/06/2014 3:32 AM

I didn't say I could do it!

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Reply Off Topic (Score 5)
Guru
United States - Member - New Member Engineering Fields - Mechanical Engineering - New Member Engineering Fields - Petroleum Engineering - New Member Hobbies - Target Shooting - New Member

Join Date: Jan 2008
Location: Spring, Texas
Posts: 3403
Good Answers: 149
#5

Re: Detector Seeks Single Photon

02/05/2014 8:12 AM

Have you tried Craigslist?

__________________
Who is John Galt?
Reply
Reply to Blog Entry 12 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Copy to Clipboard

Users who posted comments:

Del the cat (1); James Stewart (1); JohnDG (1); Rorschach (1); StandardsGuy (1); Theophilus Stark (3); Tornado (3); Usbport (1)

Previous in Blog: How to Calculate the Savings of Using LED Lights in Your Home   Next in Blog: Laser Brings Broadband to Space

Advertisement