Fluorescence of TiO2:Sm3+ composite stimulated by plasmon waves

Plasmon-coupled fluorescence of rare earth Sm3+ ions doped into the TiO2 film placed on thin gold layer is investigated. It was demonstrated that plasmon waves induced in the gold layer strongly influence rare earth emission. We revealed that each spectral peak of Sm3+ emission can be directionally separated, polarized and enhanced by intensity due to coupling with plasmon waves propagating in the gold film. It is noticeable that we obtained about 10 % of non-linear growth in Sm3+ emission intensity over the pumping strength.