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Abstract
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Utilizing boundary element method (BEM), we investigate spontaneous emission rate enhancement by spheroidalnanoantennas and the impact of position and orientation of molecules on the rate enhancement and radiation pattern.The nanoantennasconsist of two gold nanoparticles located along a line on both sides of the molecule. Molecular decay rate can be considerably enhancedby nanoantennas. The spontaneous emission rate depends on the orientation and position of molecule with respect tonanoantennas. In practice, it is not easy to fix a precise position and orientation for a molecule in the vicinity of a nanoantenna. By allowing for the effect of molecule position and orientation on the emission spectra, one can achieve a better agreement between experimental results and theoretical calculations. Moreover, it provides important information todesignthe experimental configuration.
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