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Conducting Multiple Imaging Modes with One Fluorescence Microscope
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Published on: October 28, 2018

Fluorescence advantages with microscopic spatiotemporal control.

Debabrata Goswami1, Debjit Roy, Arijit K De

  • 1Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur - 208016, India.

Proceedings of Spie--The International Society for Optical Engineering
|July 2, 2013
PubMed
Summary
This summary is machine-generated.

We demonstrate femtosecond laser pulses for selective control of fluorophores in microscopy. This technique enables precise manipulation of molecular fluorescence, advancing high-resolution imaging and single-molecule spectroscopy.

Keywords:
Fluorescence imagingfemtosecond pulsesmicroscopymulti-photon processnanoparticlespatiotemporal controltwo-photon excitation

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Area of Science:

  • Optics and Photonics
  • Biophysics
  • Spectroscopy

Background:

  • Selective excitation of fluorophores is crucial for advanced microscopy.
  • Overlapping fluorophores present challenges in distinguishing signals.
  • Femtosecond laser pulses offer unique temporal control for optical manipulation.

Purpose of the Study:

  • To develop a method for selective excitation or de-excitation of one fluorophore over another.
  • To leverage wave-packet interference for controlled fluorescence manipulation.
  • To enhance spatial resolution in microscopy and enable sub-diffraction limit nanoparticle trapping.

Main Methods:

  • Utilizing femtosecond laser pulses with variable delay or pulse trains (20-50 GHz).
  • Employing wave-packet interference for controlled fluorescence excitation/suppression.
  • Applying single-photon and multi-photon excitation conditions.

Main Results:

  • Achieved controlled fluorescence excitation/suppression of specific fluorophores.
  • Demonstrated enhanced spatial resolution, beneficial for multi-photon microscopy.
  • Enabled sub-diffraction limit trapping and observation of single nanoparticles.

Conclusions:

  • Femtosecond laser pulse manipulation offers precise control over fluorophore interactions.
  • This technique advances high-resolution microscopy and single-molecule spectroscopy.
  • It provides a versatile tool for spatiotemporal control in the microscopic world.