Broadband EPR in Microresonators

EPR微谐振器为小样本提供了极大的灵敏度提升。与经典腔谐振器相比，微谐振器的另一个特殊特性是它们的带宽很大。对于需要短时间切换激励微波场、快速调制幅度、频率或相位、或用多个频率分量和/或短死时间照射的实验来说，这是一项重要的资产。在本项目中，将开发利用这一潜力检测宽线和快速衰减信号的实验技术。此外，我们还将开发相关的宽带技术，通过对谐振器带宽内的所有自旋进行并行数据采集，进一步提高微谐振器的整体灵敏度。这种额外的灵敏度提升还利用了微谐振器的大带宽，并补偿了由于低品质因数而导致的灵敏度降低。该项目开发的技术将对这一优先方案中的许多其他项目有用，这些项目使用微谐振器敏感地检测来自小样本的信号。

EPR microresonators provide an enormous sensitivity boost for small samples. Another specific property of microresonators, compared to classical cavity resonators is their large bandwidth. This is an important asset for experiments that require short switching times of the exciting microwave field, fast modulation of amplitude, frequency or phase, or irradiation with multiple frequency components and / or short dead times. In the present project, will develop the experimental techniques that utilize this potential for the detection of broad lines and rapidly decaying signals. In addition, we will also develop related broadband techniques that further increase the overall sensitivity of microresonators by using concurrent data acquisition for all spins in the resonator bandwidth. This additional sensitivity boost also exploits the large bandwidth of microresonators and compensates the sensitivity reduction due to the low quality factor. The techniques developed in this project will be useful for many other projects in this priority programme that use microresonators for sensitive detection of signals from small samples.