EN

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

High-Sensitivity Visualization of Ultrafast Carrier Diffusion by Wide-Field Holographic Microscopy

Martin Hörmann Federico Visentin Andrea Zanetta Johann Osmond Giulia Grancini Niek F. van Hulst Matz Liebel Giulio Cerullo Franco V. A. Camargo

Martin Hörmann, Federico Visentin, Andrea Zanetta, Johann Osmond, Giulia Grancini, Niek F. van Hulst, Matz Liebel, Giulio Cerullo, Franco V. A. Camargo. 2023: High-Sensitivity Visualization of Ultrafast Carrier Diffusion by Wide-Field Holographic Microscopy. 超快科学, 2023(5). doi: 10.34133/ultrafastscience.0032
引用本文: Martin Hörmann, Federico Visentin, Andrea Zanetta, Johann Osmond, Giulia Grancini, Niek F. van Hulst, Matz Liebel, Giulio Cerullo, Franco V. A. Camargo. 2023: High-Sensitivity Visualization of Ultrafast Carrier Diffusion by Wide-Field Holographic Microscopy. 超快科学, 2023(5). doi: 10.34133/ultrafastscience.0032
Martin Hörmann, Federico Visentin, Andrea Zanetta, Johann Osmond, Giulia Grancini, Niek F. van Hulst, Matz Liebel, Giulio Cerullo, Franco V. A. Camargo. 2023: High-Sensitivity Visualization of Ultrafast Carrier Diffusion by Wide-Field Holographic Microscopy. Ultrafast Science, 2023(5). doi: 10.34133/ultrafastscience.0032
Citation: Martin Hörmann, Federico Visentin, Andrea Zanetta, Johann Osmond, Giulia Grancini, Niek F. van Hulst, Matz Liebel, Giulio Cerullo, Franco V. A. Camargo. 2023: High-Sensitivity Visualization of Ultrafast Carrier Diffusion by Wide-Field Holographic Microscopy. Ultrafast Science, 2023(5). doi: 10.34133/ultrafastscience.0032

High-Sensitivity Visualization of Ultrafast Carrier Diffusion by Wide-Field Holographic Microscopy

doi: 10.34133/ultrafastscience.0032

High-Sensitivity Visualization of Ultrafast Carrier Diffusion by Wide-Field Holographic Microscopy

  • 摘要: Ultrafast transient microscopy is a key tool to study the photophysical properties of materials in space and time, but current implementations are limited to ≈1-μm fields of view, offering no statistical information for heterogeneous samples. Recently, we demonstrated wide-field transient imaging based on multiplexed off-axis holography. Here, we perform ultrafast microscopy in parallel around a hundred diffraction-limited excitation spots over a ≈60-μm field of view, which not only automatically samples the photophysical heterogeneity of the sample over a large area but can also be used to obtain a 10-fold increase in signal-tonoise ratio by computing an average spot. We apply our microscope to study the carrier diffusion processes in methylammonium lead bromide perovskites. We observe strong diffusion due to the presence of hot carriers during the first picosecond and slower diffusion afterward. We also describe how many-body kinetics can be misleadingly interpreted as strong diffusion at high excitation densities, while at weak excitation, real diffusion is observed. Therefore, the vast increase in sensitivity offered by this technique benefits the study of carrier transport not only by reducing data acquisition times but also by enabling the measurement of the much smaller signals generated at low carrier densities.
  • 加载中
计量
  • 文章访问数:  35
  • HTML全文浏览量:  0
  • PDF下载量:  1
  • 被引次数: 0
出版历程
  • 收稿日期:  2023-01-02
  • 修回日期:  2023-03-30
  • 刊出日期:  2023-11-17

目录

    /

    返回文章
    返回