paper 140319061845

Guided mode resonance (GMR) enhanced near-infrared (near-IR)-to-visible upcon- version fluorescence (UCF) from a rare-earth doped polymer resonant waveguide grating (RWG), comprised of a NaYF4 :Yb/Tm nanocrystals doped poly-methyl-methacrylate (NaYF4 :Yb/Tm- PMMA) thin layer on top of a textured SU8 substrate with a thin intervening layer of TiO2 . Strong UCF is observed by matching either incoming near-IR excitation or out-going UCF ex- traction to the GMR wavelengths of the rare-earth doped polymer RWG. The intensity of the UCF can be enhanced up to 104 times in visible range and 103 times in near-IR range compared with that from a flat area. According to the rigorous coupled-wave analysis calculations, high enhancement of UCF is attributed to the strong local field generated at the TiO2 waveguide layer due to the resonance between the near-IR excitation light and the GMR. The extraction of the UPF is further promoted when the wavelengths of the UPF resonate with the GMRs.

Citation

Hung-Chih Kan, Chia Chen Hsu, Ching-Ting Lee, Jian-Hung Lin, Hao Yu Liou, Chu-Chi Ting, Chun-Yen Tseng, and Zhen-Dao Wang, "Guided-mode Resonance Enhanced Near-infrared-to-visible Upconversion Fluorescence in a Resonant Waveguide Grating," Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)897-901

References

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