Nevertheless the microelectronics world, where all the information is need to be processed, is constructed on silicon-based technology. Optical fibers offer the possibility to transmit information through a wide band with multiple signals without interference. Changing electrons by photons and copper wires by optical fibers the challenges are easier to be reached. The high demand for speed of high quantity information transfer requires nowadays faster devices. Key Words: Neodymium, erbium, amorphous silicon, photoluminescence, photonics. The results suggest the presence of stimulated emission process and the power of the materials to be used for photonic purposes. There were found cavity modes indicating a interference process inside the waveguide. The experimental results indicate a super linear behavior of the PL with excitation power for both materials at 10 K. PL measurements on waveguide geometry were performed. Thin films were deposited by rf sputtering a silicon target partially covered by small metallic Nd or Er platelets in a H 2+ N 2 + Ar or H 2+ O 2+ Ar atmosphere, respectively. Instituto de Física "Gleb Wataghin", UNICAMP, 13083-970 Campinas, SP, BrazilĮmail: work presents a study of the photoluminescence (PL) of Nd and Er-doped hydrogenated amorphous silicon compounds. Nd 3+ and Er 3+ in morphous silicon compounds for photonics
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