Analysis of the plasmonic power splitter and MUX/DEMUX suitable for photonic integrated circuits

A Distributed Circuit Model for Side-Coupled Nanoplasmonic Structures With Metal–Insulator–Metal Arrangement

“…The uncoupled nature of even and odd voltage and current distributions implies the diagonality of the P and R matrices in (12). It should be, however, noted that the off-diagonal elements of these matrices are in fact nonzero, when the obtained per-unit-length circuit elements are substituted in χ V and χ I .…”

“…Thanks to the beneficent electromagnetic properties of the latter arrangement, e.g., very strong field localization, and almost-zero bending loss, MIM structures are among the most favorable. It is, therefore, no surprise that different types of nanoscale photonic devices, filters [7], [8], switches [9], [10], couplers [10]- [12], and demultiplexers [12], [13]-just to name a few, are based on the MIM arrangement. These structures are usually fabricated by deposition of noble metals on fused dielectric substrates [14], [15].…”

“…MIM waveguide with stubs [17], [18], power dividers [19], subwavelength frequency splitter [13], waveguide discontinuities [20], filters [21], absorption switches [11], and resonators [22] are all already modeled by transmission lines. No attempt is, however, made to apply the transmission line model for analysis of side-coupled plasmonic devices like MIM directional couplers [10]- [12], and side-coupled resonators [7], etc. This is due to the fact that the transmission line in all of the already reported models is always a single conductor line, which cannot take the effects of coupling into account.…”

Controlling the coupling ratio of the plasmonic directional couplers by SPM and XPM nonlinear effects

“…They have various applications and can be used as wavelengthselective couplers, power splitters, optical switches and multi/demultiplexers [2], [4], [9].…”

“…In our simulations, both SPM and XPM nonlinear effects have been considered and the results are compared.The frequency dependent dielectric constant of the metal is expressed by the Drude model[4]:…”