Multi-photon-excited fluorescence resonance energy transfer in an aqueous system from ZnSe∶Mn and ZnSe quantum dots to Rhodamine 6G

摘要

In this study, we investigated the multi-photon excited fluorescence resonance energy transfer (FRET) between ZnSe and ZnSe∶Mn quantum dots and Rhodamine 6G in aqueous solution. Two and three photon excited FRET was measured by ～ 50 fs laser pulses at wavelength of～754 nm and ～1300 nm, respectively. The FRET efficiency of ZnSe∶Mn-R6G system was about 1.5-fold higher than that of the ZnSe-R6G, which was associated with increase of Forster radius of the sample. In addition, FRET efficiency of ZnSe∶Mn-R6G systems were up to 45% excited by two-photon. Our study contributed to the application of FRET in the biological and medical fields.