Franson Interference Generated by a Two-Level System.
We report a Franson interferometry experiment based on correlated photon pairs generated via frequency-filtered scattered light from a near-resonantly driven two-level semiconductor quantum dot. In contrast to spontaneous parametric down-conversion and four-wave mixing, this approach can produce single pairs of correlated photons. We have measured a Franson visibility as high as 66%, which goes beyond the classical limit of 50% and approaches the limit of violation of Bell's inequalities (70.7%).
Physics Department, University of South Florida, Tampa, Florida 33620, USA.
M
M
Peiris
Physics Department, University of South Florida, Tampa, Florida 33620, USA.
K
K
Konthasinghe
Physics Department, University of South Florida, Tampa, Florida 33620, USA.
A
A
Muller