Fig. 1
From: Hybrid tungsten oxyselenide/graphene electrodes for near-lossless 2D semiconductor phase modulators
Substantially reduced absorption of TOS/graphene on waveguides. a SEM image (top panel) of the fabricated SiN waveguide on a SiO2/Si substrate, and the simulated electric field distribution (bottom panel) within the waveguide, showing the confined transverse electric (TE) mode. b Schematic of the microring resonator integrated with the TOS/graphene HS. c Energy band diagram of the TOS/graphene interface, highlighting the electron transfer from graphene to TOS. d Simulated transmission spectra of the microring resonator for three different configurations: bare SiN microring resonator, microring integrated with graphene, and microring integrated with the TOS/graphene HS. e Experimental transmission spectra validating the simulation results. Shown are the transmission spectra of a bare microring, a microring integrated with graphene, and a microring integrated with TOS/graphene. Inset: Optical image of the TOS/graphene layer on top of the microring resonator; scale bar: 10 µm
