chanelink logo
CHANELINK
English

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

1280
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

  • Measuring invisible light through an electro-optic cavity

    Researchers have developed a new experimental platform that can measure the light wave electric field captured between two mirrors with sub periodic accuracy. This electro-optical Fabry Perot resonant cavity will achieve precise control and observation of the interaction between light and matter, especially in the terahertz (THz) spectral range. The research results were published in the journal "...

    02-19
    See translation

  • Siemens will provide Rolls Royce with aerospace additive manufacturing components

    Recently, Siemens Energy's Materials Solutions division (hereinafter referred to as Siemens) officially signed a cooperation agreement with Rolls Royce, a well-known enterprise in the field of aviation engines in the UK, agreeing that Siemens will develop and supply mass-produced additive manufacturing components for Rolls Royce's civil aerospace business.Rolls Royce and 3D Printing TechnologyRoll...

    2024-12-13
    See translation

  • Continuation of the Term of President and CEO of Jena Germany

    Recently, the supervisory board of Jenoptik, a leading German laser technology company, announced an important decision: to extend and confirm the term of Dr. Stefan Traeger as Chairman of the Executive Board, with a new term of three years starting from July 1, 2025, and the contract validity period correspondingly extended to June 30, 2028. Dr. Stefan Traeger has been serving as the President ...

    2024-09-06
    See translation

  • Snapmaker Announces Its First Dedicated Laser Cutter, the Ray, in 20w and 40w Flavors

    Snapmaker has been making three-in-one manufacturing tools -- The Snapmaker, Snapmaker 2 and Artisan -- for over six years now. These machines have changeable tool heads that can be used for 3D printing, laser cutting and CNC machining. At the beginning of this year, it branched out to make adedicated 3D printer, the J1-- a dual print-head machine that works very well -- and today the ...

    2023-08-28
    See translation

  • Lithuanian and Japanese researchers develop silver nanolaser

    Recently, researchers from Kaunas University of Technology (KTU) in Lithuania and the Tsukuba National Institute of Materials Science in Ibaraki, Japan, have collaborated to successfully develop a new type of nanolaser based on silver nanocubes.Although its structure is small and can only be observed through high-power microscopes, its potential application prospects are broad, and the research te...

    2024-12-24
    See translation