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Motivated by M-theory/superstring inspired models, we investigate certainbehaviors of the deflection angle and the shadow geometrical shapes of higherdimensional quintessential black holes associated with two values of the darkenergy (DE) state parameter, being \omega=-\frac{1}{3} and \omega=-\frac{2}{3}.Concretely, we derive the geodesic equation of photons on such backgrounds.Thanks to the Gauss-Bonnet theorem corresponding to the optical metric, wecompute the leading terms of the deflection angle in the so-called weak-limitapproximation. After that, we inspect the effect of DE and the space-timedimension d on the calculated optical quantities. Introducing DE via the fieldintensity c and the state parameter \omega, we find that the shadow size andthe deflection angle increase by increasing values of the field intensity c.However, we observe that the high dimensions decrease such quantities for\omega-models exhibiting similar behaviors. Then, we consider the effect of theblack hole charge, on these optical quantities, by discussing the associatedbehaviors. The present investigation recovers certain known results appearingin ordinary four dimensional models.

Deflection Angle and Shadow Behaviors of Quintessential Black Holes in arbitrary Dimensions