Determine the microscopic parameters governing photoinduced charge dynamics

Determine the active defect population, charge-state distribution, diffusion volume, and trapping kinetics that govern the photoinduced charge response and effective carrier-generation process in nitrogen-doped suspended diamond nanobeam cavities.

Background

The paper models the slow cavity response using phenomenological charge-generation and relaxation rates, but the inferred conversion probability depends on microscopic properties that are not directly measured. The authors note that the effective photon-to-charge conversion estimate cannot determine the ionisation quantum yield because the relevant defect population, charge-state distribution, carrier diffusion volume, and trapping kinetics are unresolved.

These parameters are important for distinguishing contributions from NV centres, substitutional nitrogen, surface states, and fabrication-induced traps, and for determining whether the observed resonance shift is produced primarily by mobile-carrier plasma dispersion, trapped-charge redistribution, or the resulting space-charge field.