chanelink logo
CHANELINK
Español

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

931
2023-12-25 14:16:07
Ver traducción

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

Recomendaciones relacionadas

  • Japan's Murata Machinery Launches a Punch and 4kW Fiber Laser Integrated System

    Recently, Murata Machinery USA, a representative Japanese manufacturer of machinery and CNC machine tools, announced the launch of the latest cutting-edge punch and fiber laser integrated equipment - MF3048HL. This integrated machine combines the advantages of punch operation and laser cutting technology, eliminating the need for separate settings or material transfer between machines.Muratec's pu...

    2023-09-01
    Ver traducción

  • First 6-inch thin film lithium niobate photonic chip wafer pilot production line

    Recently, Shanghai Jiao Tong University Wuxi Photon Chip Research Institute (CHIPX) located in Binhu District, Wuxi City, has achieved a breakthrough - the first 6-inch thin film lithium niobate photon chip wafer has been produced on China's first photon chip pilot line, and high-performance thin film lithium niobate modulator chips with ultra-low loss and ultra-high bandwidth have been mass-produ...

    06-11
    Ver traducción

  • The research team has solved decades long challenges in the field of microscopy

    When observing biological samples under a microscope, if the medium in which the objective lens is located is different from the sample, the light beam will be interfered with. For example, when observing a water sample with a lens surrounded by air, the light bends more strongly in the air around the lens than in water.This interference can cause the measured sample depth to be smaller than the a...

    2024-04-27
    Ver traducción

  • Due to research conducted by scientists from South Korea and the UK, the power of lasers will increase by one million times

    Due to research conducted by scientists from South Korea and the UK, the power of lasers will be able to increase by one million times. The researchers plan to apply this improvement for scientific purposes.The study was led by representatives of Strathclyde University and the Korea Institute UNIST and GIST. Behind the scenes footage of their work in the journal Nature Photonics. It has been prove...

    2023-11-27
    Ver traducción

  • 150 kW Ultra High Power Laser Sensor Released

    Recently, MKS announced the launch of a brand new Ophir ® A 150 kW ultra-high power laser sensor designed specifically for measuring ultra-high power levels up to 150 kW. This sensor has excellent accuracy and reliability, suitable for industrial and defense fields.This water-cooled calorimeter has a working wavelength range of 900-1100 nm and can measure power from 10 kW to 150 kW. Its extremely ...

    2024-12-27
    Ver traducción