A review of telecommunications applications of X(3) optical
non-linearities of 2D materials
Abstract
All-optical signal processing based on nonlinear optical devices is
promising for ultrafast information processing in optical communication
systems. Recent advances in two-dimensional (2D) layered materials with
unique structures and distinctive properties have opened up new avenues
for nonlinear optics and the fabrication of related devices with high
performance. This paper reviews the recent advances in research on
third-order optical nonlinearities of 2D materials, focusing on
all-optical processing applications in the optical telecommunications
band near 1550 nm. First, we provide an overview of the material
properties of different 2D materials. Next, we review different methods
for characterizing the third-order optical nonlinearities of 2D
materials, including the Z-scan technique, third-harmonic generation
(THG) measurement, and hybrid device characterization, together with a
summary of the measured n2 values in the telecommunications band.
Finally, the current challenges and future perspectives are discussed.