Optical emission at 1.32 μm from sulfur-doped crystalline silicon

Abstract
We report the observation of efficient photoluminescence from a new sulfur-related impurity in crystalline silicon. We tentatively identify this emission as bound-exciton luminescence from sulfur-related isoelectronic impurities. We present the results of measurements of the lifetime, temperature dependence, and external efficiency of the 1.32 μm band.