Exceptional ultrafast nonlinear optical response of functionalized silicon nanosheets
Michalis Stavrou, Amelie M. Mühlbach, Vasilios Arapakis, Elisabeth Groß, Tim Kratky, Sebastian Günther, Bernhard Rieger, Stelios Couris
Abstract
, respectively, which are significantly lower than those of other 2D nanostructures. In addition, it is shown that both SiNS samples have great potential in already existing Si-based optoelectronic devices for optical-switching applications since they exhibit very strong NLO refraction comparable to that of bulk Si. The results of the present work demonstrate that the chemical functionalization of SiNSs provides a highly efficient strategy for the preparation of 2D Si-based nanostructures with enhanced NLO response in view of several optoelectronic and photonic applications, such as OL, SA, and all-optical switching.