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Bragg Diffraction of Large Organic Molecules.

Christian Brand^1,2, Filip Kiałka^1,3, Stephan Troyer¹

¹University of Vienna, Faculty of Physics, Boltzmanngasse 5, A-1090 Vienna, Austria.

Physical Review Letters

|August 4, 2020

Summary

This summary is machine-generated.

Bragg diffraction was demonstrated for complex molecules like ciprofloxacin and phthalocyanine using an optical grating. This technique enables efficient beam splitters and mirrors for molecules, transferring significant momentum.

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Area of Science:

Quantum optics
Molecular physics
Diffraction physics

Background:

Bragg diffraction is a key phenomenon in quantum optics.
Optical gratings are used to manipulate light and matter waves.
Previous studies have focused on simpler atomic or molecular systems.

Purpose of the Study:

To demonstrate Bragg diffraction for complex molecules.
To investigate momentum transfer in molecular diffraction.
To explore the potential for novel molecular beam splitters and mirrors.

Main Methods:

Utilizing a thick optical grating to diffract molecules.
Analyzing diffraction patterns and their dependence on incidence angle.
Measuring population transfer between diffracted and undiffracted beams.

Main Results:

Observed single dominant diffraction order for ciprofloxacin and phthalocyanine.
Demonstrated expected angular dependence of diffraction patterns.
Achieved equal-amplitude splitting (14ℏk) and maximum momentum transfer (18ℏk).

Conclusions:

Bragg diffraction is feasible for complex molecules.
The demonstrated technique allows for efficient momentum transfer.
This work enables development of advanced beam splitters and mirrors for molecular manipulation.