Silicon slot waveguides have great potential in hybrid silicon integration to realize nonlinear optical applications. We propose a rectangular-cladding hybrid silicon slot waveguide. Simulation result shows that, with a rectangular-cladding, the slot waveguide can be formed by narrower silicon strips, so the two-photon absorption (TPA) loss in silicon is decreased. When the cladding material is a nonlinear polymer, the calculated TPA figure of merit (FOMTPA) is 4.4, close to the value of bulk nonlinear polymer of 5.0. This value confirms the good nonlinear performance of rectangular-cladding silicon slot waveguides.
The emission of erbium ions in silica glass around 1.55 μm is significant enhanced by the surface plasmon polaritons
(SPPs). The coupling efficiency between the SPPs and the photons is calculated by the rigorous coupled-wave analysis.
The external quantum efficiency (EQE) of the erbium-doped silica materials assisted by using the double metallic grating
(DMG) could increase 2.45 times than that by using the single metallic grating (SMG).
The progress in Si-based optoelectronic devices and their integration for optical communications are summarized. Integrations on different material platforms are described, but emphasis is given to new micro/nano scale emitters, detectors, and light beam controlling devices. The perspective of micro/nano scale monolithic integration of optical devices and electronic devices on a single chip by standard CMOS technologies is presented. The possibility of using these devices for computer data communications, board-to-board and chip-to-chip, is also discussed.
The emission of erbium ions in silicon at 1550nm is enhanced by the presence of the two-dimensional (2D) plasmonic crystal. The nonradiative surface plasmon polaritons (SPPs) are generated through the relaxation of the excited erbium ions. The SPPs can be highly confined at the edge of the band of the 2D plasmonic crystal. By adding or reducing a multiple of external wave vector, the large amount of SPPs will be coupled out. The emission efficiency of erbium ions with help of reradiated SPPs can increase nearly 40 times comparing to that of one-dimensional (1D) metal grating. The emission angles of enhanced spectrum are discussed.