Summary: INSTITUTE OF PHYSICS PUBLISHING JOURNAL OF PHYSICS D: APPLIED PHYSICS
J. Phys. D: Appl. Phys. 34 (2001) 19331938 www.iop.org/Journals/jd PII: S0022-3727(01)20751-7
Strobe imaging of electric fields by
depolarization of Rydberg states of Hg
Marcis Auzinsh, Lalith Jayasinghe, Lance Oelke, Ruvin Ferber
and Neil Shafer-Ray
The University of Oklahoma, Norman, OK 73019, USA
Received 11 January 2001, in final form 19 April 2001
We present a new technique for imaging electric fields that takes advantage
of the large field-dependent coupling of the Rydberg states of Hg.
Specifically we demonstrate an optical scheme that takes advantage of the
field-induced mixing of the 6s(2
S)nd D and 6s(2
S)(n + 1)p P states of Hg.
With the appropriate laser probe of this mixing, 579.2 nm light is produced
that is directly related to the strength of the local electric field. This allows
strobe images to be made of the electric field surrounding an object on a
50 ps timescale. We demonstrate the utility of this technique by probing the
electric field surrounding pads on a digital integrated circuit package.