Direct imaging of tunneling from a potential well.
We experimentally map the wavefunction in the vicinity of a radial potential well. We photograph light intensity near the tunneling region as well as measure the spiraling phase structure via interference with a reference wave. This spiraling phase structure is required for conservation of angular momentum. The experimental image reveals the non-intuitive emission of light from a region in space that is empty of material and relatively far from the device.
Tomes
Mathew
M
Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109, USA. tomesmat@umich.edu
Vahala
Kerry J
KJ
Carmon
Tal
T