Spatial-to-spectral mapping in spontaneous parametric down-conversion
Silvia Carrasco, Juan P. Torres, Lluís Torner, Alexander V. Sergienko, Bahaa E. A. Saleh, Malvin Carl Teich · Physical Review A · 2004
We put forward an approach for manipulating the spectral profile of entangled photon pairs. Such spectral properties are mediated by the geometry of noncollinear spontaneous parametric down-conversion and by selecting the appropriate spatial profile of the pump laser radiation. We show that one can translate spatial features imprinted in the pump beam into desired spectral profiles of the generated entangled-photon state. Particular configurations suitable for generating entangled pairs with ultranarrow spectral width and with multiple-peaked spectra are demonstrated.