Emerging nanoscale silicon-photonics with its advances in fabrication and integration of on-chip CMOS-compatible optical elements are good news for system designers. Optical Network-on-Chips (ONoCs) could be the next generation of NoCs. On the other hand, hybrid opto-electrical networks may provide higher bandwidth, lower latency and better power dissipation when considering both optical and electrical characteristics on multicore platforms. The cluster based technique locally connects processing cores through electrical interconnect, while the clusters themselves are connected together through an optical waveguide. The experimental results show that in most benchmark applications, the cluster size of 4 proves to be an appropriate size for optimizing the energy-delay product (EDP) parameter.