1 / 13

Advances in Microresonators for EPR Experiments: Design, Optimization, and Future Directions

This paper discusses the concept, design, and technological constraints of microresonators for Electron Paramagnetic Resonance (EPR) experiments. The sensitivity of the resonator can be enhanced by minimizing its size, thus increasing the filling factor. We explore the optimization of microcoil design using 3D electrodynamic simulations, focusing on improving the signal-to-noise ratio. Future developments include smaller coils, advanced numerical modeling, and alternative substrates. The findings suggest that the sensitivity of the microcoil can match or exceed conventional cavity resonators for samples with limited spins.

camdyn
Télécharger la présentation

Advances in Microresonators for EPR Experiments: Design, Optimization, and Future Directions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Microresonator for the EPR experiments R. Narkowicz

  2. Outline • Concept of the microresonator • Experimental and technoligical constraints • Microcoil design and optimization • Experimental verification of the design • Next steps • Conclusions

  3. Concept of the microresonator • Sensitivity of the resonator for small samples can be increased by minimizing its size and thus increasing the filling factor • Resonator built with discrete components has to be at least order of magnitude smaller than the operation wavelength • Experience with such a resonators in a field of NMR confirms that sensitivity varies inver-sely with linear dimensions of the elements

  4. Technological constraints • Planar elements are ideal to be manu-factured by means of standard micro-technology • Planar microcoil is well suited for the mono-layers of of N@C60 and can be desig-ned on the same Si substrate, on which fullerenes can be deposited • Si substrate would provide the heat sink required for the operation at high current densities in small size elements

  5. Microcoil design and optimization • main optimization criterion– signal-to-noise ratio • signal can be maximized byincreasing magnetic field • noise can be reduced by minimizing trace resistance

  6. optimization results

  7. 3D electrodynamic simulation – surface current

  8. 3D electrodynamic simulation – magnetic field distribution

  9. Tuning the microcoil with the shunt stub

  10. CW EPR of DPPH f=14GHz spectrometer sensitivity B-Field / mT

  11. ODMR of a single N-V defectin diamond

  12. Next steps • Smaller coils • Numerical modeling of skin- and proximity effects • New substrates with lower losses (glass) or better thermal conductivity (Si) • Coplanar waveguide as an alternative coupling system

  13. Conclusions • The sensitivity of the microcoil prototype is comparable with that of conventional cavity • The further miniaturization of the microcoil should made it superior to the waveguide cavity for the samples containing small number of spins

More Related