TY - CONF
AU - Alexander Mikhaylov
AU - Kristen Parzuchowski
AU - Michael Mazurek
AU - Daniel Lum
AU - Thomas Gerrits
AU - Charles Champ
AU - Martin Stevens
AU - Ralph Jimenez
AU - Zameer Hasan
AU - P. Hemmer
AU - Alan Migdall
AB - Entangled two-photon absorption (e2PA) employs advantages of classical two-photon absorption techniques while operating in a linear excitation regime at low fluxes and potentially having greatly enhanced absorption probabilities. A major challenge in measuring the e2PA cross section, sigma(e2PA), is to discriminate e2PA from onephoton losses. Carefully designed transmittance measurements are required to distinguish the two mechanisms. For example, the e2PA signal should depend on the time delay between photons within an entangled pair (in contrast to one-photon losses). Here we present an experimental system implementing this characterization. We perform transmittance experiments for Zinc-tetraphenylporphyrin (ZnTPP) in toluene solution. We use entangled photons produced via spontaneous parametric downconversion at 810 nm wavelength as an excitation source. We show that the change in transmittance associated with e2PA in the sample is less than 1% in our experiment. From our measurements we conclude ZnTPP's sigma(e2P)A 1.7 x 10 cm(2).
BT - Advanced Optical Techniques for Quantum Information, Sensing, and Metrology
DA - 2020-02
DO - 10.1117/12.2541888
N2 - Entangled two-photon absorption (e2PA) employs advantages of classical two-photon absorption techniques while operating in a linear excitation regime at low fluxes and potentially having greatly enhanced absorption probabilities. A major challenge in measuring the e2PA cross section, sigma(e2PA), is to discriminate e2PA from onephoton losses. Carefully designed transmittance measurements are required to distinguish the two mechanisms. For example, the e2PA signal should depend on the time delay between photons within an entangled pair (in contrast to one-photon losses). Here we present an experimental system implementing this characterization. We perform transmittance experiments for Zinc-tetraphenylporphyrin (ZnTPP) in toluene solution. We use entangled photons produced via spontaneous parametric downconversion at 810 nm wavelength as an excitation source. We show that the change in transmittance associated with e2PA in the sample is less than 1% in our experiment. From our measurements we conclude ZnTPP's sigma(e2P)A 1.7 x 10 cm(2).
PB - SPIE
PY - 2020
SN - 9781510633537
EP - 112950Q
T2 - Advanced Optical Techniques for Quantum Information, Sensing, and Metrology
TI - A comprehensive experimental system for measuring molecular two-photon absorption using an ultrafast entangled photon pair excitation source
VL - Proceedings of SPIE
ER -