arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1812.01409physics.optics
收藏

单个金纳米粒子的双光子和三光子激发发光:超短脉冲laser在等离子体发射和电子空穴对发射之间的转换

Two and three photon excited luminescence of single gold nanoparticles: Switching between plasmon- and electron-hole-pair emission by ultrashort laser pulses

Frank Wackenhut, Xiao Wang, Antonio Virgilio Failla, Alfred J. Meixner

摘要:

在这项工作中,我们使用飞秒激光脉冲的800 nm波长的激发和表征单金纳米粒子的多光子发光发射。对于激发与100 fs的激光脉冲,我们观察到一个两个和三个光子的辐射电子空穴对复合为主的发射,而发射是由辐射等离子体衰变激发与500 fs的脉冲。对于具有不同长径比的单个金纳米棒,我们研究了粒子等离子体激元和电子空穴对之间的相互作用,这使我们能够开发一个定量模型来充分描述单个金纳米颗粒的双光子和三光子发光发射。

英文摘要:

In this work we use femtosecond laser pulses of 800 nm wavelength to excite and characterize the multiphoton luminescence emission of single gold nanoparticles. For excitation with 100 fs laser pulses we observe a two and three photon emission dominated by radiative electron hole pair recombination, while the emission is caused by radiative plasmon decay for excitation with 500 fs pulses. For single gold nanorods with different aspect ratios, we study the interplay between the particle plasmon and electron hole pairs, which enables us to develop a quantitative model to fully describe the two and three photon luminescence emission of single gold nanoparticles.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑