Fluorescent Dye Showing A Pinpoint Of Laser Light
by Dr Brad Amos/science Photo Library
Title
Fluorescent Dye Showing A Pinpoint Of Laser Light
Artist
Dr Brad Amos/science Photo Library
Medium
Photograph - Photograph
Description
Pinpoint of light. Cuvette with dye showing the pinpoint of light effect produced by a laser. It has implications for laser use in microscopy, microsurgery and optical memory devices. The cuvette contains safranin dye which normally needs green light to make it fluoresce. The light beam (at upper centre) is caused by green laser light. The spot (lower centre) is caused by an infrared beam of a mode-locked pulsed laser which has been focused by a lens. Photons in this beam can be absorbed at the same time by the same molecule and so add their energies together. This 2-photon absorption only occurs at high intensities at the beam's focal point, leading to a precise pinpoint.
Uploaded
September 26th, 2018
Embed
Share
Comments
There are no comments for Fluorescent Dye Showing A Pinpoint Of Laser Light. Click here to post the first comment.