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Picosecond spectroscopy: applications in biochemistry. Part I: Techniques.

T A Doust, D Phillips, G Porter

Biochemical Society Transactions

|August 1, 1984

Summary

Researchers explore picosecond optical pulses for studying rapid molecular dynamics. Advanced techniques leverage laser pulse polarization for time-dependent anisotropy measurements, reaching 30 femtosecond resolution.

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Area of Science:

Physical Chemistry
Molecular Dynamics
Laser Spectroscopy

Background:

Fast molecular processes require high-time-resolution techniques.
Picosecond optical pulses offer a means to probe these dynamics.
Laser pulse properties, such as polarization, can provide additional information.

Purpose of the Study:

To review sources of picosecond optical pulses.
To discuss their application in investigating fast molecular processes.
To highlight the utility of laser pulse polarization for time-dependent anisotropy measurements.

Main Methods:

Utilizing picosecond and femtosecond laser pulses.
Employing techniques sensitive to molecular motion and orientation.
Extending existing methods to incorporate polarization analysis.

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Main Results:

Established methods for generating picosecond optical pulses.
Demonstrated the application of these pulses in studying molecular dynamics.
Achieved state-of-the-art pulse generation at 30 femtoseconds.
Showcased the value of polarization for measuring time-dependent anisotropy.

Conclusions:

Picosecond and femtosecond optical pulses are effective tools for molecular process investigation.
Laser pulse polarization enhances the study of time-dependent anisotropy.
30 femtosecond resolution is sufficient for most biological and molecular studies, balancing time resolution with spectral information.