The present disclosure provides a method for a catalyst-free growth mode of defect-free Gallium Arsenide -based nanoneedles on silicon substrates with a complementary metal-oxide-semiconductor -compatible growth temperature of around 400\xb0 C. Accordingly, the stop band of the desired bandwidth in the desired communications band can be formed and the size of the communications system can be reduced. The system comprises memory, another memory, and a processor. A slider is coupled to a free end of the load beam extension, and a gimbal coupled to the second end of the load beam and to the slider. For analysis of prostate samples, each of these reference Raman data sets may have an associated known prostate sample and an associated known disease state, metabolic state, clinical outcome, andor disease progression. The position-shift amount is smaller than the branch width of the first or second sub electrode branch.