Spin noise spectroscopy: From proof of the principle to applications

TL;DR

This paper reviews the development and recent advances of spin noise spectroscopy, a technique for studying magnetic resonance and spin dynamics using Faraday-rotation noise, highlighting its unique capabilities and practical applications.

Contribution

It provides a comprehensive overview of spin noise spectroscopy's physical basis, evolution, and recent experimental progress, emphasizing its advantages over traditional methods.

Findings

Demonstrated the feasibility of spin noise detection in various systems

Highlighted recent technical improvements enabling practical applications

Showcased the technique's unique capabilities in magnetic resonance studies

Abstract

More than 30 years ago, the feasibility of detecting magnetic resonance in the Faraday-rotation noise spectrum of transmitted light has been demonstrated experimentally. However, practical applications of this experimental approach have emerged only recently thanks, in particular, to a number of crucial technical ements. This method has now become a popular and efficient tool for studying magnetic resonance and spin dynamics in atomic and solid-state paramagnets. In this paper, we present a review of research in the field of spin noise spectroscopy including its physical basis, its evolution since its first experimental demonstration, and its recent experimental advances. Main attention is paid to the specific capabilities of this technique that render it unique compared to other methods of magnetic and optical spectroscopy. The paper is primarily intended for the experimentalists who may wish to use this novel optical technique.