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Published on: October 13, 2017
Modification of two-photon excited fluorescence from quantum dots on SiN photonic crystals
Xingsheng Xu1, Toshiki Yamada, Shiyoshi Yokoyama
1State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences,Beijing 100083, China. xsxu@red.semi.ac.cn
Abstract:
We investigate two-photon excited fluorescence from CdSe quantum dots with a center-emitting wavelength of 655 nm on SiN photonic crystals. We find that two-photon excited fluorescence is enhanced by more than 1 order of magnitude in the vertical direction when a photonic crystal is used compared to the fluorescence spectra in the absence of photonic crystals. The spectrum of two-photon excited fluorescence from quantum dots on SiN photonic crystal is observed to shift to blue compared to that from quantum dots on SiN without photonic crystals.
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