Energy transfer from fluorescein (Fl) to Rhodamine B (RhB) in the opal photonic crystals has been investigated by photoluminescence. The results show that the energy transfer can be enhanced effectively by photonic bandgaps. When the fluorescence emission wavelength of donor Fl overlaps the photonic bandgap the fluorescence intensity of the donor is suppressed, while the fluorescence intensity of acceptor RhB is obviously enhanced. This enhancement can be attributed to the inhibition of radiative emission of the donor in the photonic crystals.
© 2008 Optical Society of America
Original Manuscript: January 3, 2008
Revised Manuscript: June 26, 2008
Manuscript Accepted: July 21, 2008
Published: August 22, 2008
Zhengwen Yang, Xinran Zhou, Xueguang Huang, Ji Zhou, Gang Yang, Qin Xie, Li Sun, and Bo Li, "Energy transfer between fluorescent dyes in photonic crystals," Opt. Lett. 33, 1963-1965 (2008)