Plasmon coupling interactions and inhibition of nonlinear absorption in a complex system with Ag and Pt nanoparticles in silica
Por:
Bornacelli, J., Torres-Torres, C., Can-Uc, B., Rangel-Rojo, R., Oliver, A.
Publicada:
1 ene 2020
Resumen:
The optical response exhibited by a complex hybrid system integrated by Pt ultrasmall fluorescent particles and plasmonic Ag nanoparticles is reported. The system was synthesized by coimplantation of Ag and Pt ions into a silica matrix followed by a proper thermal annealing. The energies and fluences were chosen in order to overlap the spatial regions of the Ag and Pt ion distributions below the silica surface. Optical absorption and emission spectroscopies show that the complex nanostructures exhibit an important plasmonic response, together with photoluminescence excited at 355 nm, which is enhanced when compared to the reference sample with only Pt particles. Off-resonance nonlinear transmission and Z-scan measurements were undertaken using ultrafast pulses. High-irradiance excitation at 1064 nm with picosecond pulses shows that the Pt or Ag nanoparticles exhibit a two-photon absorption effect, while the complex system shows the absence of any nonlinear absorption. Similar observations were made using femtosecond pulses at 800 nm wavelength. This inhibition of the two-photon absorption effect and enhancement in the emission of the complex hybrid samples by the synergic participation of Ag and Pt particles can be explained as a result of a plasmon coupling via the near-field interaction between plasmonic and emitting sources. © 2020 Optical Society of America.
Filiaciones:
Bornacelli, J.:
Sección de Estudios de Posgrado e Investigación Física, Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad Zacatenco, Instituto Politécnico Nacional, Ciudad de México, 07738, Mexico
Inst Politecn Nacl, Escuela Super Ingn Mecan & Elect Unidad Zacatenco, Secc Estudios Posgrad & Invast Fis, Ciudad De Mexico 07738, Mexico
Torres-Torres, C.:
Sección de Estudios de Posgrado e Investigación Física, Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad Zacatenco, Instituto Politécnico Nacional, Ciudad de México, 07738, Mexico
Inst Politecn Nacl, Escuela Super Ingn Mecan & Elect Unidad Zacatenco, Secc Estudios Posgrad & Invast Fis, Ciudad De Mexico 07738, Mexico
Can-Uc, B.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, A.P. 14, Ensenada, B.C. 22800, Mexico
Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, AP 14, Ensenada 22800, Baja California, Mexico
Rangel-Rojo, R.:
Depto. de Óptica, Centro de Investigación Científica y de Educación Superior de Ensenada, A.P. 360, Ensenada, B.C. 22860, Mexico
Ctr Invest Cient & Educ Super Ensenada, Dept Opt, AP 360, Ensenada 22860, Baja California, Mexico
Oliver, A.:
Instituto de Física, Universidad Nacional Autónoma de México, Ciudad de México, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Fis, Ciudad De Mexico 04510, Mexico
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