Microwave Power Spectra of Stimulated Phonon Emission and Spatio-Temporal Structures in an Optical-Wavelengths Acoustic Laser (Paramagnetic Phaser)

TL;DR

This study investigates the microwave power spectra and spatio-temporal structures in an optical-wavelength acoustic laser (phaser), revealing spectral narrowing and autowave-like motions under specific modulation conditions through experimental quantum acoustics methods.

Contribution

It provides new experimental insights into the self-organized motions and spectral behaviors of a paramagnetic phonon laser using quantum acoustics techniques.

Findings

Narrowing of microwave power spectra observed

Autowave-like superslow motion detected

Spectral and spatio-temporal structures characterized

Abstract

A problem of self-organized motions in solid-state nonequilibrium media has been studied experimentally using methods of quantum acoustics. Generalized Poincare cross-sections of microwave power spectra (MPS) have been obtained in an optical-wavelengths acoustic laser (paramagnetic phaser) based on ruby crystal. Considerable narrowing of MPS and their autowave-like superslow motion have been observed under conditions of periodical pump modulation beyond the region of the phaser relaxation resonance. Some preliminar experimental results of this work were published in: Solid State Communications, Vol.90, No.8, P.501 (1994). An interpretation of the experimental data see arXiv:1101.0482v1 ; arXiv:cond-mat/0410460v1 ; arXiv:cond-mat/0303188v1 .