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<p>We describe the principle and applications of the resonant spin inertia technique that is based on optically detected magnetic resonance. It combines optical pumping and Faraday/Kerr rotation probing in a single laser beam and measures spin resonance and the spin inertia effect induced by a modulated radiofrequency field. This method is sensitive, technically simple, and applicable to a wide range of material systems. It provides access to the basic spin properties, including the longitudinal spin relaxation time <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(T_1\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>T</mi> <mn>1</mn> </msub> </math></EquationSource> </InlineEquation>, which can be measured selectively for different spin resonances present in the system. We demonstrate the application of the technique to rare-earth Ce<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(^{3+}\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mrow> <mn>3</mn> <mo>+</mo> </mrow> </mmultiscripts> </math></EquationSource> </InlineEquation> ions in a YAG matrix, (In,Ga)As/GaAs quantum dots, and lead halide perovskite nanocrystals. The technique allowed to measure <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(T_1\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>T</mi> <mn>1</mn> </msub> </math></EquationSource> </InlineEquation> in these systems, ranging from microseconds to milliseconds, and to reveal peculiarities of spin relaxation for charge carriers as well as for spatially indirect excitons.</p>

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ODMR-Based Resonant Spin Inertia: A Sensitive Technique for Studying Spin Relaxation

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  • 发表日期：

    2026年7月20日

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  • Vasilii V. Belykh

摘要

We describe the principle and applications of the resonant spin inertia technique that is based on optically detected magnetic resonance. It combines optical pumping and Faraday/Kerr rotation probing in a single laser beam and measures spin resonance and the spin inertia effect induced by a modulated radiofrequency field. This method is sensitive, technically simple, and applicable to a wide range of material systems. It provides access to the basic spin properties, including the longitudinal spin relaxation time \(T_1\) T 1 , which can be measured selectively for different spin resonances present in the system. We demonstrate the application of the technique to rare-earth Ce \(^{3+}\) 3 + ions in a YAG matrix, (In,Ga)As/GaAs quantum dots, and lead halide perovskite nanocrystals. The technique allowed to measure \(T_1\) T 1 in these systems, ranging from microseconds to milliseconds, and to reveal peculiarities of spin relaxation for charge carriers as well as for spatially indirect excitons.