A British student has used an ordinary camera and tripod to capture a prizewinning photograph of a single atom.
David Nadlinger was able to capture the atom, which was held
between two small needle tips about 2 millimetres apart. (David Nadlinger, The
University of Oxford)
The long exposure photograph was taken by University of
Oxford student David Nadlinger through a window of a ultra-high vacuum chamber.
Apart from using a lens accessory that increases the focal
length of an existing lens, much of the camera technology Mr Nadlinger used was
simplistic.
But the scientific process behind capturing the atom in the
photo was much more complex.
The single positively-charged strontium atom, held near
motionless by electric fields, was illuminated by a laser of a blue-violet
colour which caused the atom to absorb and re-emit light quickly enough for an
ordinary camera to capture it in a long exposure photograph.
Mr Nadlinger was able to zoom in close enough to capture the
atom, which was held between two needle tips about 2 millimetres apart.
The resulting image named Single Atom in an Ion Trap came
first in the Equipment and Facilities category of the Engineering and Physical
Sciences Research Council's national science photography competition.
You might have the right camera rig, but it might not be so
simple to snap your own atom selfie just yet.
"The idea of being able to see a single atom with the naked eye had struck me as a wonderfully direct and visceral bridge between the miniscule quantum world and our macroscopic reality," Mr Nadlinger said.
"A back-of-the-envelope calculation showed the numbers to be on my side, and when I set off to the lab with camera and tripods one quiet Sunday afternoon, I was rewarded with this particular picture of a small, pale blue dot."