Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session A37: Hybrid Quantum Systems: Spins and Defects
8:00 AM–11:00 AM,
Monday, March 14, 2022
Room: McCormick Place W-194B
Sponsoring Unit: DQI
Chair: Sam Whiteley, HRL
Abstract: A37.00009 : Spin fluorescence detection by a microwave photon counter : a sensitive new method for EPR spectroscopy*
10:00 AM–10:12 AM
In pulse EPR spectroscopy, the Hahn echo sequence leads to the emission of a burst of coherent microwave radiation called the spin-echo, which is detected by amplification and demodulation. We have recently proposed and demonstrated  an alternative method, where we apply a single pi pulse to the spins. While this does not lead to any coherent microwave emission, incoherent microwave photons are emitted upon radiative relaxation towards equilibrium at a rate enhanced by the Purcell effect , and these photons can be efficiently detected by a microwave photon counter .
I will present this new EPR spectroscopy by spin fluorescence method, and I will compare its sensitivity to the usual inductively-detected echo method.
 E. Albertinale et al., arxiv:2102:01415
 A. Bienfait et al., Nature 531, 74 (2016)
 R. Lescanne et al., PRX 10, 021038 (2020)
*We acknowledge support from AIDAS Joint Virtual laboratory, from the Agence Nationale de la Recherche through the Chaire Industrielle NASNIQ and the project MIRESPIN, and from Région Ile-de-France through the DIM SIRTEQ.
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