Nanodiamonds containing the Nitrogen-vacancy (NV) centre are emerging as a unique platform for nanoscalesensing in biological systems. There is particular interest in the capability of sensing subcellular changes ofmagnetic and electrical fields, temperature, and pressure. However, the sensitivity of such nanodiamond particleswith NV centre as a probe is highly dependent on the relative location and polarisation of the NV centre tothe bulk of the particle. Here we show the optical scattering from an NV centre in a nanodiamond as afunction of position and orientation within the nanodiamond. The scattering fields are obtained by using therecently developed robust non-singular surface integral equation method. Our results highlight a new pathwayto nanodiamond characterisation which may be useful in teasing out the various effects of surface morphology,surface termination, and formation details, which ultimately may benefit the optimisation of diamond productionfor nanoscale biosensing applications.
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