chanelink logo
CHANELINK
简体中文

High sensitivity visualization of ultrafast carrier diffusion using a wide field holographic microscope

923
2023-12-25 14:16:07
查看翻译

A sketch of the imaging and holographic parts of a transient holographic microscope, including a pulse sequence, to illustrate the signal modulation method. By imaging the pinhole array at the sample position, a diffraction limited excitation spot array can be created, allowing for the simultaneous collection of transient data around 100 excitation spots.

Femtosecond transient microscopy is an important tool for studying the ultrafast transport characteristics of excited states in solid samples. Most implementations are limited to photoexcitation of a single diffraction limit point on the sample and tracking the temporal evolution of subsequent carrier distribution, thus covering a very small sample area.

Recently, scientists from Italy and Spain have demonstrated how to construct an all optical phase-locked camera by using off-axis holography, significantly increasing the field of view of ultrafast microscopes. The camera decouples the signal demodulation speed from the maximum detector frame rate.

In this original work published in the journal Ultrafast Science, researchers demonstrated simultaneous transient imaging of dozens of individual nanoobjects, with the entire field of view excitation being desirable. It is not yet clear how to apply new holographic techniques in solid-state samples that require diffraction limit excitation. Ideally, a diffraction limited excitation point array covering the entire field of view will be generated, so that multiple points in the large sample area can be detected simultaneously.

The article "High sensitivity visualization of ultrafast carrier diffusion using a wide field holographic microscope" demonstrates how to achieve this feature by imaging a pinhole array at the sample position. This not only helps to obtain statistical information about sample photophysics, but also for uniform samples, the signals of all light spots can be averaged, greatly improving the signal-to-noise ratio.

Source: Laser Net

相关推荐

  • Beyond Limits: The Amazing Power of Water in Laser Development

    Water helps to generate ultra continuous white lasers with an extremely wide wavelength range.Researchers have made significant progress in creating ultra wideband white laser sources, which have a wide wavelength range from ultraviolet to far-infrared. These advanced lasers are used in various fields, including imaging, femtosecond chemistry, telecommunications, laser spectroscopy, sensing, and u...

    2024-02-26
    查看翻译

  • Developing miniaturized laser technology: This company has secured $5 million in financing

    Recently, high-performance laser supplier Skylark Lasers announced that it has raised $5 million in investment to further advance its efforts in miniaturized laser technology.Skylark Lasers is established at the center of the Scottish Photonics Cluster, focusing on the design and production of compact diode pumped solid-state (C-DPSS) lasers with the purest spectral characteristics, providing high...

    2023-11-02
    查看翻译

  • The fiber laser system overcomes outdated issues through a PC based EtherCAT control platform

    In order to maintain relevance and success, companies with a long history must respect their past while not ignoring the future. This is the method adopted by Cincinnati Corporation (CI), a metal processing machinery manufacturer based in Harrison, Ohio, since its establishment in the late 1890s.The company is carefully considering technological changes. Incorrect selection of control hardware, ne...

    2024-05-25
    查看翻译

  • Lameditech of South Korea was listed on the KOSDAQ exchange on the 17th

    On June 11, 2024, Korean laser medical equipment manufacturer Lameditech successfully completed its initial public offering and was listed on the KOSDAQ exchange on the 17th.Last month, its public offering price was fixed at 16000 Korean won. In this public offering, Lameditech issued a total of 1298000 shares, raising approximately 20.8 billion Korean won. Since Lameditech's debut on KOSDAQ, as o...

    2024-06-26
    查看翻译

  • The improvement of additive manufacturing through artificial intelligence, machine learning, and deep learning

    Additive manufacturing (AM) has made it possible to manufacture complex personalized items with minimal material waste, leading to significant changes in the manufacturing industry. However, optimizing and improving additive manufacturing processes remains challenging due to the complexity of design, material selection, and process parameters. This review explores the integration of artificial int...

    02-24
    查看翻译