Jianbo Yin

Integrating more components in one silicon photonic chip is critical for processing exponentially growing data in optical communications and photonic computing. One of the key components in the chip, the electro-optic modulator, suffers from an oversized footprint (in millimeters). Graphene modulators are more compact, with device sizes at hundreds of micrometers.

Abstract Two-dimensional (2D) materials could be used to build next-generation electronics. However, despite progress in the synthesis of single-crystal 2D wafers for use as the channel material in devices, the preparation of single-crystal dielectric wafers—and their reliable integrating on 2D semiconductors with clean interfaces, large gate capacitance and low leakage current—remains challenging.

Abstract The anomalous photovoltaic effect (APE) in polar crystals is a promising avenue for overcoming the energy conversion efficiency limits of conventional photoelectric devices utilizing p-n junction architectures. To facilitate effective photocarrier separation and enhance the APE, polar materials need to be thinned down to maximize the depolarization field. Here, we demonstrate Janus MoSSe monolayers (~0.67 nm thick) with strong spontaneous photocurrent generation.