Two-photon excited fluorescence from CdSe quantum dots on SiN photonic crystals

Xingsheng Xu; Yamada, Toshiki; Ueda, Rieko; Otomo, Akira
November 2009
Applied Physics Letters;11/30/2009, Vol. 95 Issue 22, p221113
Academic Journal
Two-photon excited fluorescence from CdSe quantum dots on a two-dimensional SiN photonic crystal surface is investigated by using a femtosecond laser. By using a photonic crystal, a 90-fold enhancement in the two-photon excited fluorescence in the vertical direction is achieved. This is the highest enhancement achieved so far in the two-photon excited fluorescence in the vertical direction. The mechanism of the enhancement for two-photon excited fluorescence from quantum dots on photonic crystals is analyzed.


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