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Related Experiment Video

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Using Microfluidics and Fluorescence Microscopy to Study the Assembly Dynamics of Single Actin Filaments and Bundles

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Published on: May 5, 2022

Filamentation without intensity clamping.

P Prem Kiran¹, Suman Bagchi, Cord L Arnold

¹Tata Institute of Fundamental Research,1, Homi Bhabha Road, Mumbai 400005, India.

|October 14, 2010

Summary

This summary is machine-generated.

Measurements show ultrashort laser pulses create supercontinuum emission in air. Tightly focused pulses achieve peak intensities significantly higher than previously observed, revealing a new filamentation regime without intensity clamping.

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Area of Science:

Laser physics
Nonlinear optics
Plasma physics

Background:

Ultrashort laser pulses can generate supercontinuum emission (SCE) through filamentation in gases.
Intensity clamping is a known phenomenon in loose focusing geometries, limiting peak power.

Purpose of the Study:

To investigate supercontinuum emission from ultrashort Ti:Sapp laser pulse filamentation in a tightly focused geometry.
To understand filamentation regimes that bypass conventional intensity clamping.

Main Methods:

Experimental setup utilizing ultrashort Ti:Sapp laser pulses.
Tightly focused beam geometry to induce filamentation.
Spectral analysis of supercontinuum emission.

Main Results:

Observed significant spectral broadening of SCE, indicating extremely high peak intensities.
Peak intensities were measured to be at least one order of magnitude higher than the typical clamping value.
Demonstrated a regime of filamentation without intensity clamping.

Conclusions:

Tightly focused geometries enable laser pulse filamentation exceeding conventional intensity limits.
This work provides insights into nonlinear light-matter interactions at unprecedented intensities.
The findings open new avenues for high-intensity laser applications and fundamental physics research.