chanelink logo
CHANELINK
English

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

1260
2023-12-25 14:16:07
See translation

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

Related Recommendations

  • 3D printing giant Materialise reorganizes

    Recently, the stock price of Materialise, a well-known company in the 3D printing industry, plummeted by 35% overnight. This news was like a heavy bomb, instantly causing a storm in the industry! What exactly happened to Materialise, which was originally developing steadily? Why has there been such a significant drop in stock prices? Today, let's delve into the reasons behind this.The truth behind...

    03-03
    See translation

  • Launching the world's strongest laser at a cost of 320 million euros

    Beijing, April 1st (Reporter Liu Xia) - The world's most powerful laser has been activated recently. On March 31st, the Physicist Organization Network reported that the system can enable laser pulses to reach a peak of 10 terawatts (1 terawatt=100 terawatts=1015 watts) within 1 femtosecond (1000 trillions of a second), which is expected to promote revolutionary progress in multiple fi...

    2024-04-03
    See translation

  • The 3D toy printer is easy to use and safe, perfect for children and adults

    Children (and adults) like to collect toys, but what if they can make them themselves? This is exactly the focus of the Toybox 3D printer luxury bundle. This 3D printer for children's toys incorporates innovative technology into simplified products, making it very suitable for young people. Do you want to have your own? The cost of this 3D toy printer has been reduced to $348.99.Generally speaking...

    2024-06-05
    See translation

  • Marvin Panaco launches the Mastersizer 3000 for laser diffraction particle size determination+

    Marvin Panaco, a subsidiary of Spectris plc located in Egham, Surrey, UK, announced the launch of its new laser diffraction particle size measurement instrument Mastersizer 3000+. Mastersizer 3000+utilizes integrated artificial intelligence and data science driven software solutions, providing method development support, data quality feedback, instrument monitoring, and troubleshooting recommendat...

    2024-03-22
    See translation

  • The Japanese team uses laser technology for ice core sampling to accurately study climate change

    Recently, a research team from the Astronomical Glaciology Laboratory under the RIKEN Nishina Center (RNC) of the Japanese Institute of Physics and Chemistry announced that they have developed a new laser based sampling system for studying the composition of glacier ice cores.The above image shows the discrete holes sampled 150mm from the shallow ice core of the Fuji Ice Dome in Japan (Southeast ...

    2023-09-23
    See translation