What is mesh order lumerical?
The mesh order is used by the simulation engine to select which material to use when two materials. overlap in the simulation region.
What is mesh order?
The mesh order property governs how overlapping objects are meshed in the simulation. Depending on their mesh orders, the object that is actually being simulated will be different. In the event that both overlapping materials have the same order, the mesh order will be inferred from the Object tree.
What is mesh in FDTD?
The mesh used by the finite-difference time-domain (FDTD) method is a strictly rectilinear mesh using Yee-cells.
What is FDTD lumerical?
FDTD is the gold-standard for modeling nanophotonic devices, processes, and materials. FDTD is a simulator within Lumerical’s DEVICE Multiphysics Simulation Suite, the world’s first multiphysics suite purpose-built for photonics designers.
What is a second order mesh?
As can be seen, second order element consist of additional mid nodes due to which the deformation can be captured more accurately. Therefore, using them most of the time will lead to better results with even less number of nodes compared to first order mesh.
What’s the difference between first order and second order elements?
In layman’s terms, this just means that second-order elements are able to have curved edges whereas the edges of first-order elements must remain straight.
What is the difference between FEM and FDTD?
FDTD is for time varying field and FEM is for harmonic field (time is frozen). FDTD is rather for CEM for example. FEM work well for antennas. About computer memory, the two simulations are volumic meshes so need huge memory (depend on the structure simulated).
What is lumerical mode?
MODE is a simulator within Lumerical’s DEVICE Multiphysics Simulation Suite, the world’s first multiphysics suite purpose-built for photonics designers.
What are the differences between a first order tetrahedral element and a second order tetrahedral element?
First-order tetrahedral elements have four nodes, straight edges, and flat faces. Second-order tetrahedral elements have 10 nodes and model the secondorder displacement field in their volume, along faces, and edges. The edges and faces before and after deformation can be curved.
What is second order mesh?
What is a first order element?
So, what exactly does that mean? Firstly, on the most fundamental level, it describes whether your elements contain only corner nodes (first-order) or if they contain corner nodes and mid-side nodes (second-order).
What is FDTD simulation?
FDTD is a versatile modeling technique used to solve Maxwell’s equations. FDTD is a time-domain technique, and when a broadband pulse (such as a Gaussian pulse) is used as the source, then the response of the system over a wide range of frequencies can be obtained with a single simulation.
Where do I set the Order of the mesh?
The mesh order can be set at the material level (in the material database), or the object level (in the object properties). Materials with a lower mesh order take priority over materials with a higher priority number (i.e. order 1 takes priority over 2).
What’s the mesh order for the etch material?
The etch material in the default Material database: By default, most materials in the material database have a mesh order of 2. The only exception is the etch material, which has a mesh order of 1. The lower mesh order means that an object using the etch material will override other objects of a different material type.
How are materials assigned priority in mesh order?
Materials with a lower mesh order take priority over materials with a higher priority number (i.e. order 1 takes priority over 2). Areas that overlap are assigned the material properties of the higher priority material (see the following figure). In the figure above, there are two objects that partially overlap.
What happens if two objects have the same mesh order?
In the figure above, there are two objects that partially overlap. Depending on their mesh orders, the object that is actually being simulated will be different. In the event that both overlapping materials have the same order, the mesh order will be inferred from the Object tree.