Old 11-30-2009, 06:58 PM #1
Arayan's Avatar
Class 3R Laser
 
Join Date: Oct 2009
Location: Italy
Posts: 1,747
Rep Power: 3635
Arayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond repute
Arayan Arayan is offline
Class 3R Laser
Arayan's Avatar
 
Join Date: Oct 2009
Location: Italy
Posts: 1,747
Rep Power: 3635
Arayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond repute
Default The trapped rainbow

Abstract : We report on the first experimental demonstration of the broadband "trapped rainbow" in the visible frequency range using an adiabatically tapered waveguide. Being a distinct case of the slow light phenomenon, the trapped rainbow effect could be applied to optical computing and signal processing, and to providing enhanced light-matter interactions.



University professors coated one side of a 4.5 millimetre diameter lens with a 30 nanometre thick coat of gold film, which they then put on a sheet of glass also splashed with a helping of gold. After shining a laser beam at the space between the curved lens and the glass, a rainbow appeared trapped between the elements when looked down on with a microscope. No pot of gold appeared, but a little dancing McNulty, dressed in a leprechaun costume, could be seen under the rainbow.

From: [0911.4464] Experimental observation of the trapped rainbow


Arayan is offline   Reply With Quote


















Old 12-04-2009, 02:11 AM #2
VW's Avatar
VW VW is offline
Class 2M Laser
 
Join Date: Mar 2008
Posts: 579
Rep Power: 12
VW will become famous soon enough
VW VW is offline
Class 2M Laser
VW's Avatar
 
Join Date: Mar 2008
Posts: 579
Rep Power: 12
VW will become famous soon enough
Default Re: The trapped rainbow

Is that an actual photograph of the experiment? Or a reconstruction? I'm guessing the latter...
__________________
Dragon Lasers Hulk >150mW 532nm - Average 212mW
Dragon Lasers Spartan BP >40mW 473nm - Average 47mW
Kryton Groove PHR 405nm - TBC
VW is offline   Reply With Quote
Old 12-04-2009, 09:32 AM #3
Arayan's Avatar
Class 3R Laser
 
Join Date: Oct 2009
Location: Italy
Posts: 1,747
Rep Power: 3635
Arayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond repute
Arayan Arayan is offline
Class 3R Laser
Arayan's Avatar
 
Join Date: Oct 2009
Location: Italy
Posts: 1,747
Rep Power: 3635
Arayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond repute
Default Re: The trapped rainbow

Quote:
Is that an actual photograph of the experiment? Or a reconstruction? I'm guessing the latter...
Yes, the picture is a recostruction, the real one shown in the paper is more accurate but less spectacular
Arayan is offline   Reply With Quote
Old 12-04-2009, 04:29 PM #4
VW's Avatar
VW VW is offline
Class 2M Laser
 
Join Date: Mar 2008
Posts: 579
Rep Power: 12
VW will become famous soon enough
VW VW is offline
Class 2M Laser
VW's Avatar
 
Join Date: Mar 2008
Posts: 579
Rep Power: 12
VW will become famous soon enough
Default Re: The trapped rainbow

Still pretty cool though! This an odd and interesting experiment, thanks for sharing...
__________________
Dragon Lasers Hulk >150mW 532nm - Average 212mW
Dragon Lasers Spartan BP >40mW 473nm - Average 47mW
Kryton Groove PHR 405nm - TBC
VW is offline   Reply With Quote
Old 12-04-2009, 04:36 PM #5
rangedunits's Avatar
٩(̾●̮̮̃̾•̃̾)۶ __̴ı̴̴̡&
 
Join Date: Jan 2008
Location: Montréal, Canada
Posts: 3,588
Rep Power: 1955
rangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond repute
Send a message via MSN to rangedunits
rangedunits rangedunits is offline
٩(̾●̮̮̃̾•̃̾)۶ __̴ı̴̴̡&
rangedunits's Avatar
 
Join Date: Jan 2008
Location: Montréal, Canada
Posts: 3,588
Rep Power: 1955
rangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond reputerangedunits has a reputation beyond repute
Send a message via MSN to rangedunits
Default Re: The trapped rainbow

Thats a cool experience.
__________________
CRH-
rangedunits is offline   Reply With Quote
Old 12-05-2009, 04:18 AM #6
randomlugia's Avatar
Class 3R Laser
 
Join Date: Sep 2008
Location: Williamsport, MD
Posts: 1,808
Rep Power: 112
randomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond repute
randomlugia randomlugia is offline
Class 3R Laser
randomlugia's Avatar
 
Join Date: Sep 2008
Location: Williamsport, MD
Posts: 1,808
Rep Power: 112
randomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond repute
Default Re: The trapped rainbow

Really interesting... Just curious, do you know the wavelength of the laser they used?
__________________
Laser Addict---Audiophile---Knife Nut
randomlugia is offline   Reply With Quote
Old 12-05-2009, 09:49 AM #7
Arayan's Avatar
Class 3R Laser
 
Join Date: Oct 2009
Location: Italy
Posts: 1,747
Rep Power: 3635
Arayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond repute
Arayan Arayan is offline
Class 3R Laser
Arayan's Avatar
 
Join Date: Oct 2009
Location: Italy
Posts: 1,747
Rep Power: 3635
Arayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond reputeArayan has a reputation beyond repute
Default Re: The trapped rainbow

Quote:
Really interesting... Just curious, do you know the wavelength of the laser they used?
Was used a light from a multi-wavelength argon ion laser (operating at λ=457 nm, 465 nm, 476 nm, 488 nm and 514 nm) and 633-nm light from a He-Ne laser coupled to the waveguide via side illumination.
Attached Thumbnails
The trapped rainbow-img_1083.jpg   The trapped rainbow-img_1084.jpg  

Last edited by Arayan; 10-08-2012 at 06:52 PM. Reason: Addition of temporary pics
Arayan is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 10:36 PM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC