AcademicArticleSCO_84965080918
Academic Article in Scopus
Overview
Overview
abstract
Copyright 2016 by the American Association for the Advancement of Science; all rights reserved. Nonlinear optical phenomena are crucial for a broad range of applications, such asmicroscopy, all-optical data processing, and quantum information. However, materials usually exhibit a weak optical nonlinearity even under intense coherent illumination.We report that indium tin oxide can acquire an ultrafast and large intensity-dependent refractive index in the region of the spectrum where the real part of its permittivity vanishes.We observe a change in the real part of the refractive index of 0.72 ± 0.025, corresponding to 170%of the linear refractive index. This change in refractive index is reversible with a recovery time of about 360 femtoseconds. Our results offer the possibility of designing material structures with large ultrafast nonlinearity for applications in nanophotonics.
