Interferometric optical path measurement of a glass wedge with single photons and biphotons |
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| Authors: | Schmid K Becker H Dultz W Martienssen W Kempe M Schmitzer H |
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| Institution: | Physikalisches Institut, J. W. Goethe Universit?t, 60054 Frankfurt/Main, Germany. kayschmid@web.de |
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| Abstract: | 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. |
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