Spatial Control of Entangled Two-Photon Absorption with Organic Chromophores

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• 作者：Alica R. Guzman ; Michael R. Harpham ; zgn Szer ; Michael M. Haley ; Theodore G. Goodson ; III
• 刊名：Journal of the American Chemical Society
• 出版年：2010
• 出版时间：June 16, 2010
• 年：2010
• 卷：132
• 期：23
• 页码：7840-7841
• 全文大小：149K
• 年卷期：v.132,no.23(June 16, 2010)
• ISSN：1520-5126

文摘

Entangled photons generated by spontaneous parametric down-conversion (SPDC) have been used to investigate entangled two-photon absorption (ETPA) in multiannulene systems. The ETPA characteristics are shown to depend on the spatial orientation of the SPDC emission pattern. The expected dependence of the absorption rate on input flux is seen for emission patterns that exhibit spatial indistinguishability between the signal and idler photons, while no absorption is observed for a spatially distinguishable emission pattern. The amount of absorption of entangled photons is also seen to depend on the degree of overlap of the entangled photons for the indistinguishable conditions. Tunability of the entangled photon absorption can thus be achieved by utilizing the spatial characteristics of the entangled photon pairs.