Talk:Optical tweezers

message: I'd like to start working on improving the optical tweezers entry over the following days/weeks/months.  In order to help with that, I've decided to create a To Do List.  Others are encouraged to participate by adding/deleting/discussing entries on the list in addition to editing the article.
-RockyRaccoon 22:54, 3 September 2006 (UTC)
thread_title: To Do List

message: I finished the equations section with some explanation of the steps throughout.  Any comments of the layout?  I erred on the side of including too many equations so that every step is exlpicitly shown.  I figured this would allow a wider range of audiences to follow through the derivation themselves if they desire.  I feel it's better that way than to include only the punchline.  At first the layout looked messy, but I cleaned it up quite a lot and I'm fairly happy with it now.  I think a bit more physical explanation may be needed either before or after the equations, but I'm not sure yet what to put there, if anything.  Any ideas are greatly appreciated!
-RockyRaccoon 07:41, 9 September 2006 (UTC)
thread_title: Equations

message: I was thinking about removing the quote from the Steven Chu interview.  It's rather long and I feel it distracts from the main content of the article.  There is already a reference to the interview and readers who are interested in this will likely follow the reference to it.  But I think its a poor assumption that all readers will be interested.  Any comments? -RockyRaccoon 07:37, 3 September 2006 (UTC)
thread_title: Steven Chu Quote in History Section

message: It looks great as well...However, i think that a quotation by either Ashkin or steven chu
should be added to give the article some personal touch instead of being too technical.
-leenewt
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Units...
The first sentence in the "Optical tweezers in brief" section doesn't make sense.  Specifically, "...from less than one piconewton to greater than a femtonewton."  A femtonewton is smaller than a piconewton.  I don't know if the two words need to be switched or if the original author had the incorrect units...
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The Next Step in Optical Tweezers.....where are we heading to?
Are we heading anywhere with the physics of optical tweezers? It appears that optical tweezers have a stronghold in the world of microbiologist and atom cooling, but more so as a tool. Most of the fundamental physics behind optical tweezers have been well cover by the early pioneer especially Arthur Ashkin.
One strong question that i am eager to answer is, What else has optical tweezers not been applied on? Which realms of science has optical tweezers yet to touch?....
1) Atmospheric Science where aerosol trapping is quite an immature field? 
2) Ocean science where tweezers can be brought to the depth of the ocean to study the single cell micro-organism in the deep sea.
Anymore??!!
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NOTE: Link on second refrence at bottom of page is broken.--134.10.9.127 19:51, 12 January 2006 (UTC)
thread_title:  Addition of some Quote in History Section

message: I've removed this section, as optical tweezers have become such a widely used tool that this is analogous to something like "research groups using electron microscopy"... such a list can never be complete.
Akriasas (talk) 18:49, 7 February 2008 (UTC)
thread_title:  Research groups using optical tweezers 

message: The following statement appears in the "History and development" section:
:In 2004 Optical tweezers made the leap from large, complicated, expensive machines to much simpler, smaller, inexpensive and ultimately portable systems with the introduction of DLBT (Diode Laser Bar Trapping).
I am proposing to remove this statement because this technique has not made a lasting, substantial impact in the "History and development of optical trapping." If I am mistaken, can somebody provide evidence of its widespread adoption? I don't wish to diminish the impact of the paper, but I do not think every change in geometry or optics needs to be mentioned in this section.  —Preceding unsigned comment added by Chodges (talk • contribs) 23:38, 23 February 2008 (UTC)
replies: text: I changed it to sound less dramatic. --chodges (talk) 22:38, 5 March 2008 (UTC)
thread_title:  DLBT in "History and development" 

message: This needs and article of its own.  Someone qualified please take it on.  Many new applications are missing such as NMEMs, and optical signal processing etc..  —Preceding unsigned comment added by 12.229.112.98 (talk) 16:00, 12 October 2009 (UTC)
thread_title:  Optical Gradient Force 

message: I'd have added this to the to-do list, but a Ctrl+F didn't even find the mention of the word Doppler, so I'm not sure if I'm hallucinating.
I recall reading a few years back that there was an optical trap mechanism for atoms whose working principle was the Doppler effect. Very briefly: you have six lasers - two along each orthogonal spatial axis, pointed at each other, all tuned to an absorption line of the atom in question. What then happens is - any random motion of the atom away from the point of intersection is compensated for by the Doppler shift. Say, the perturbation was in the +x direction... then the atom would experience a blue-shift from the laser that was lasing toward the -x direction, and pick up more momentum from this laser to go back to the centre, while concurrently, experiencing a decrease in momentum it picks up from the laser lasing toward the +x direction. 
Elegantly enough, it doesn't matter if the doppler shifted photon packets are of a wavelength which doesn't correspond to a the trapped atom's quantum level transitions. The atom particle will just continue on it's perturbed course, until the incident photons are Doppler shifted enough to match. i.e. even if the absorption is at discrete intervals in the frequency domain, the shift is continuous. [Of course, this is assuming the perturbed particle is accelerating, and that its velocity is changing.]
It was a while back, and I don't remember the other specifics.  — Preceding unsigned comment added by 220.224.246.97 (talk) 01:05, 3 February 2013 (UTC)
thread_title:  Doppler Effect 

message: Hello fellow Wikipedians,
I have just added archive links to  on Optical tweezers. Please take a moment to review my edit. If necessary, add  after the link to keep me from modifying it. Alternatively, you can add  to keep me off the page altogether. I made the following changes:
*Added archive https://web.archive.org/20050411192741/http://www.bell-labs.com:80/user/feature/archives/ashkin/ to http://www.bell-labs.com/user/feature/archives/ashkin/
*Added archive https://web.archive.org/20061229170740/http://www.st-andrews.ac.uk:80/~atomtrap/papers/Thesis/LynnThesis.pdf to http://www.st-andrews.ac.uk/~atomtrap/papers/Thesis/LynnThesis.pdf
*Added archive https://web.archive.org/20060514093754/http://www.physics.gla.ac.uk:80/Optics/projects/opticalSpanner/ to http://www.physics.gla.ac.uk/Optics/projects/opticalSpanner/
*Added archive https://web.archive.org/20071109004942/http://www.biophysj.org:80/cgi/content/full/88/5/3689 to http://www.biophysj.org/cgi/content/full/88/5/3689
*Added archive https://web.archive.org/20070928193958/http://www.ircscotland.net/technology_trade/techalert_item.cfm?uuidTechAlert=00389015-9C68-39BA-D56C02105AD9A419 to http://www.ircscotland.net/technology_trade/techalert_item.cfm?uuidTechAlert=00389015-9C68-39BA-D56C02105AD9A419
When you have finished reviewing my changes, please set the checked parameter below to true to let others know.
Cheers. —cyberbot IITalk to my owner:Online 02:03, 18 October 2015 (UTC)
thread_title:  External links modified 

message: Hello fellow Wikipedians,
I have just added archive links to  on Optical tweezers. Please take a moment to review my edit. If necessary, add  after the link to keep me from modifying it. Alternatively, you can add  to keep me off the page altogether. I made the following changes:
*Added archive https://web.archive.org/20041128050339/http://www.st-andrews.ac.uk:80/~atomtrap/Research/Beams/Bessel%20Beams/BesselBeams.htm to http://www.st-andrews.ac.uk/~atomtrap/Research/Beams/Bessel%20Beams/BesselBeams.htm
When you have finished reviewing my changes, please set the checked parameter below to true to let others know.
Cheers.—cyberbot IITalk to my owner:Online 18:04, 5 January 2016 (UTC)
thread_title:  External links modified 

message: 2018 physics nobel prize went to Arthur Ashkin “for the optical tweezers and their application to biological systems”. --grin ✎ 15:24, 2 October 2018 (UTC)
thread_title:  Nobel prize