Interferometric optical path measurement of a glass wedge with single photons and biphotons.
We have measured the phase structure of a glass wedge with single photons and biphotons in a Mach-Zehnder interferometer using parametric downconverted light from a Hong-Ou-Mandel particle interferometer as the source. By scanning the wedge through the focus of a microscope objective we find a doubling of the period of the interference pattern in the coincidence counts for biphotons compared to the single-photon experiment. We compare our measurement setup with classical ones and discuss some of the problems of superresolution in quantum lithography.
Schmid
K
K
Physikalisches Institut, J. W. Goethe Universität, 60054 Frankfurt/Main, Germany. kayschmid@web.de
Becker
H
H
Dultz
W
W
Martienssen
W
W
Kempe
M
M
Schmitzer
H
H