Accurate and efficient simulation for silicon-nanowire-based multimode interference couplers with a 3D finite-element mode-propagation analysis

• A three-dimensional (3D) finite-element mode-propagation analysis is presented to give an accurate and efficient simulation for silicon-nanowire- based multimode interference (MMI) couplers. For the presented numerical method, a finite-element method mode solver is used to calculate the mode profiles and the propagation constants in a multimode section. The comparison between the presented method and some other numerical methods [e.g., finite-difference time-domain (FDTD) method, beam propagation methods, etc.] is also shown. It is shown that the presented numerical method gives simulation results very close to those from the 3D FDTD (with a deviation less than 1%). Therefore, it is very convenient for the design of Si-nanowire-based MMI couplers.

Ämnesord

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

Nyckelord

Beam propagation method

Finite difference time domain method

Integrated optics

Nanowires

Number theory

Numerical methods

Three dimensional

3D FDTD

Efficient simulation

Finite-element

MMI-coupler

Mode profiles

Mode solvers

Multimode interference couplers

Multimodes

Propagation constant

Silicon Nanowires

Simulation result

Three-dimensional (3D)

Finite element method

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)