Broadband EPR in Microresonators

EPR微谐振器为小样品提供了巨大的灵敏度提升。与经典腔谐振器相比，微谐振器的另一个特定特性是它们的大带宽。这对于需要激发微波场的短切换时间、幅度、频率或相位的快速调制或具有多个频率分量和/或短死区时间的照射的实验是重要的资产。在本项目中，将开发实验技术，利用这种潜力的检测宽线和快速衰减的信号。此外，我们还将开发相关的宽带技术，通过使用谐振器带宽中所有自旋的并发数据采集，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。在这个项目中开发的技术将是有用的许多其他项目在这个优先方案中，使用微谐振器从小样本的信号灵敏检测。

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.