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From LASER physics to the para-hydrogen pumped RASER.

S Appelt¹, A Kentner¹, S Lehmkuhl²

¹Central Institute for Engineering, Electronics and Analytics - Electronic Systems (ZEA-2), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.

Progress in Nuclear Magnetic Resonance Spectroscopy

|November 30, 2019

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This summary is machine-generated.

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The p-H2 pumped RASER exhibits self-organization properties analogous to LASERs, enabling micro-Hertz resolution in nuclear magnetic resonance (NMR) spectroscopy. This breakthrough opens doors for advanced sensors and molecular structure analysis.

Area of Science:

Quantum Optics and Spectroscopy
Nuclear Magnetic Resonance (NMR)
Self-Organization Phenomena

Background:

Laser (Light Amplification by Stimulated Emission of Radiation) theory utilizes the enslaving principle, where the light field controls atomic dynamics.
Para-hydrogen (p-H2) pumped RASER (Raman Amplification by Stimulated Emission of Radiation) systems offer unique quantum phenomena.
Nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for molecular structure determination.

Purpose of the Study:

To compare the self-organization properties of LASERs with p-H2 pumped RASERs.
To investigate the theoretical framework governing p-H2 pumped RASER operation.
To explore the potential of RASER technology for high-resolution NMR spectroscopy.

Main Methods:

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Theoretical derivation of RASER equations of motion based on order parameters and the enslaving principle.

Analysis of multi-mode RASER operation conditions.

Experimental investigation of RASER phenomena in 15N pyridine and 3-picoline molecules using SABRE.

Main Results:

The transverse magnetization of RASER-active spin states acts as the order parameter, enslaving electromagnetic modes.
Long-lasting multi-mode RASER oscillations achieve unprecedented NMR spectroscopic resolution down to the micro-Hertz regime.
Observed phenomena include spectral collapse, self-organized frequency-combs, and J-coupled molecular network spectra, correlating with experimental observations of single oscillations, giant pulses, or complex beat patterns.

Conclusions:

The p-H2 pumped RASER demonstrates LASER-like self-organization, with spin magnetization enslaving electromagnetic modes.
This technology enables ultra-high resolution NMR spectroscopy, surpassing current limitations.
Potential applications include high-precision sensors for magnetic fields, rotational motion, and detailed molecular structure analysis in materials science, physics, and medicine.