Matteo Salomoni, Etiennette Auffray, Paul Lecoq, Stefan Enoch, Alberto Gola, Stefan Gundacker, Marco Toliman Lucchini, Alberto Mazzi and Marco Paganoni We present the advancements obtained in trying to minimize the time jitter and photo-detection efficiency of Silicon photo-multipliers (SiPM). SiPM suffers from non-homogeneity of the avalanche generation as a function of the e-h generation position and from non-optimal detection efficiency, particularly at low over-voltages. Using light concentrator tuned on the single photo-avalanche diode shape could minimize the jitter by confining the photo-conversion region in the vicinity of the high field. Combining this with the inclusion of hyperbolic meta-material inside or in the vicinity of the high field region has the potential to produce a leap in performance of these devices.