2001/10/09 by Magued B. Nasr, Ayman F. Abouraddy, Mark C. Booth +6 · 1 citation
Biochemistry, Genetics and Molecular Biology · Engineering · Physics and Astronomy · #Advanced Fluorescence Microscopy Techniques #Force Microscopy Techniques and Applications #Nonlinear Optical Materials Studies #quant-ph
paper · pdf · doi:10.1103/physreva.65.023816
published as Phys. Rev. A 65, 023816 (2002) · Accepted for publication in Physical Review A
arxiv created 2001/10/09 · openalex publication_date 2002/01/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study two-photon excitation using biphotons generated via the process of spontaneous parametric down-conversion in a nonlinear crystal. We show that the focusing of these biphotons yields an excitation distribution that is essentially the same as the distribution of one-photon excitation at the pump wavelength. We also demonstrate that biphoton excitation in the image region yields a distribution whose axial width is approximately that of the crystal thickness and whose transverse width is that of the pump at the input to the crystal.