Title :
Spot size measurement and focusing of momentum entangled photon pairs
Author :
Schlenk, Daniel ; Weinfurter, Harald
Author_Institution :
Fak. fur Phys., Ludwig-Maximilians-Univ., München, Germany
Abstract :
We show the use of gold nanoparticles in a confocal microscope setup to determine the point-spread function of a high NA objective and to show the enhancement in resolution using momentum entangled states of light. In this experiment a microscope objective with an numerical aperture (NA) of 1.4 is used to focus either light from a laser diode (808nm, coupled to single mode fiber) or momentum entangled photon pairs from a type I spontaneous parametric down-conversion (SPDC) pumped by a fiber coupled 404nm laser diode.
Keywords :
gold; nanoparticles; nanophotonics; optical focusing; optical microscopy; optical pumping; optical transfer function; optical variables measurement; quantum entanglement; quantum optics; Au; confocal microscope; fiber coupled laser diode; gold nanoparticles; momentum entangled photon pairs; momentum entangled states; numerical aperture objectives; optical focusing; point-spread function; spontaneous parametric down-conversion; spot size measurement; wavelength 404 nm; wavelength 808 nm;
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference
Conference_Location :
Munich
Print_ISBN :
978-1-4577-0533-5
Electronic_ISBN :
Pending
DOI :
10.1109/CLEOE.2011.5943406
