title: Modification of two-photon excited fluorescence from quantum dots on SiN photonic crystals.
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.
authors.affiliation: State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences,Beijing 100083, China. xsxu@red.semi.ac.cn
authors.forename: Xingsheng
authors.initials: X
authors.lastname: Xu
authors.forename: Toshiki
authors.initials: T
authors.lastname: Yamada
authors.forename: Shiyoshi
authors.initials: S
authors.lastname: Yokoyama
mesh_terms: D001703:Biophysics / Q000379:methods; D003116:Color; D003460:Crystallization; D004867:Equipment Design; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods; D017785:Photons; D045663:Quantum Dots; D017655:Silicon Compounds / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013499:Surface Properties
chemical_list: D017655:Silicon Compounds; C032734:silicon nitride