Radiative and nonradiative decay rates in chromium-related centers in nanodiamonds | Zendy

Stefania Castelletto | Zendy; Alberto Boretti | Zendy

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Radiative and nonradiative decay rates in chromium-related centers in nanodiamonds

Author(s) -

Stefania Castelletto,

Alberto Boretti

Publication year - 2011

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.36.004224

Subject(s) - radiative transfer , diamond , quantum efficiency , photon , finite difference time domain method , photon counting , physics , spontaneous emission , atomic physics , dipole , optics , quantum , materials science , laser , quantum mechanics , composite material

We address for the first time the measurement of nonradiative decay rates in Cr-related centers in nanodiamonds. Compared to our previous quantum efficiency measurement of Cr centers created in bulk diamond, separate measurements of radiative and nonradiative decay rates in grown nanodiamonds prove more challenging due to size dependence effects. We demonstrate in this Letter that, using defocused dipole imaging and collection efficiency calculation via finite-difference time-domain (FDTD), a quantum efficiency up to 0.9 can be inferred to Cr-related centers showing a 2-level system photon statistics.

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