Strong coupling of electromagnetic cavity fields with antiferromagnetic spin waves in hematite ($\alpha$-${\mathrm{Fe}}_2{\mathrm{O}}_3$) is achieved above room temperature. A cube of hematite is placed in a metallic tube and the transmission is measured, using a continuous-wave terahertz spectrometer. The spectra, collected as a function of the temperature, reveal the formation of magnetic polaritons.

中文翻译：

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反铁磁谐振与亚太赫兹腔场的强耦合

赤铁矿中电磁腔场与反铁磁自旋波的强耦合（$\alpha$--${铁}_{\mathrm{2个}}{\mathrm{Ø}}_3$）是在室温以上达到的。将一块赤铁矿放在金属管中，并使用连续波太赫兹光谱仪测量透射率。随温度变化而收集的光谱揭示了磁极化子的形成。