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Center for Astrophysics Research and Technologies Seminar Series Information


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Characterizing coherence times of solid state spin defects

Thursday April 28, 2022
11:00 am

 Presenter:  Chandrasekhar Ramanthan, Dartmouth
 Series:  CQuIC Seminars
 Abstract:  Donor and defect electronic spins in solids are promising platforms for quantum technologies. Understanding how systems such as donors in silicon or defects in diamond and silicon carbide decohere under different experimental conditions is key to enabling improved materials design and to identifying optimal operating conditions. In this talk I will describe two recent sets of experiments from our group. In the first set of experiments we measure the decay of Hahn-echoes to characterize the spectral diffusion of electron spins in phosphorus-doped silicon at high magnetic fields (~8T) and show how this can be modulated using optical excitation. In the second series of experiments we compare the coherence times of ensembles of substitutional nitrogen (P1) centers and optically-polarized nitrogen-vacancy (N centers in diamond at lower magnetic fields using CPMG dynamical decoupling sequences.

(This is a joint OSE / CQuIC seminar)
 Host:  Victor Acosta
 Location:  PAIS-1100, PAIS

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