MPBI(1) MIT Photonic-Bands Package MPBI(1)NAME
mpbi - mpb with inversion symmetry
mpbi-split - mpb-split with inversion symmetry
DESCRIPTION
This manual page documents briefly the mpbi and mpbi-split commands. This manual page was written for the Debian GNU/Linux distribution
because the original programs don't have a manual page.
mpbi is a version of mpb built with requiring inversion symmetry. It can only compute the eigenstates of structures with inversion symme-
try, but runs twice as fast as mpb and requires half as much memory.
mpbi-split is equivalent to mpb-split but runs mpbi instances.
SEE ALSO mpb(1),mpb-split(1).
AUTHOR
mpbi was written by Steven G. Johnson <stevenj@alum.mit.edu>. This manual page was written by Josselin Mouette <joss@debian.org>, for the
Debian GNU/Linux system (but may be used by others).
MPB April 29, 2002 MPBI(1)
Check Out this Related Man Page
MPB-DATA(1) MIT Photonic-Bands Package MPB-DATA(1)NAME
mpb-data - transformations of HDF5 files output by MPB
SYNOPSIS
mpb-data [OPTION]... [HDF5FILE]...
DESCRIPTION
mpb-data is a utility to perform additional processing and transformations of HDF5 files output by MPB, the MIT Photonic-Bands program. In
particular, it is designed to make the output more amenable to visualization by reformatting it into a rectangular grid, extending it to
multiple periods, and rescaling the data.
MIT Photonic Bands (MPB) is a free program to compute the band structures (dispersion relations) and electromagnetic modes of periodic
dielectric structures.
HDF5 is a free, portable binary format and supporting library developed by the National Center for Supercomputing Applications at the Uni-
versity of Illinois in Urbana-Champaign. A single h5 file can contain multiple data sets; by default, mpb-data operates on all of the MPB-
produced datasets in the file, but this can be changed via the -d option, or by using the syntax HDF5FILE:DATASET.
mpb-data writes its output datasets as additional datasets in the input file(s), with "-new" appended to the dataset names. Alternatively,
it can write its output to a separate file, specified by the -o option.
Note also that, by default, the output datasets are identical to the input datasets; you must use one or more of the options below to spec-
ify a transformation (e.g. the -r/-e and -n options are very useful).
OPTIONS -h Display help on the command-line options and usage.
-V Print the version number and copyright info for mpb-data.
-v Verbose output.
-o file
Write output datasets to file (for the first input file only) rather than as additional datasets in the input file(s) (the default).
-r Output a rectangular cell with the same volume as the cell of the input data. This option is particularly useful for visualizing
data from non-orthogonal unit cells (e.g. a triangular lattice), as otherwise the data will appear skewed or warped in most graphics
programs. This option should almost always be accompanied by the -n option to ensure a uniform resolution.
-e x,y,z
As the -r option, but also make the first axis of the output along the x,y,z direction (in Cartesian coordinates) instead of along
the first lattice vector as for -r.
-n n Output n grid points per lattice unit ("a"). This is useful not only for interpolating to finer (or coarser) resolutions, but also
to ensure that the resolution is uniform in each direction (to prevent the data from looking distorted when you visualize it).
-x mx, -y my, -z mz
This tells mpb-data to output multiple periods in the corresponding lattice directions. to use a particular slice of a two- or
three-dimensional dataset. e.g. -x 3.2 causes the output of 3.2 periods in the first lattice direction. The default is to output
only a single period.
-m s Output s periods in each lattice direction; equivalent to: -x s -y s -z s.
-T The output has the first two dimensions (x and y) transposed. This is useful in conjunction with the parallel (MPI) version of MPB,
which for performance reasons outputs all arrays with the first two dimensions transposed. -T can undo this transposition.
-p Pixellized output. Normally, the input data is linearly interpolated to the output grid, but the -p option causes it to instead use
the nearest grid point in the input data. This is useful, for example, if you want to study the discretization of the dielectric-
function representation.
-d name
Use dataset name from the input files; otherwise, the first dataset from each file is used. Alternatively, use the syntax
HDF5FILE:DATASET, which allows you to specify a different dataset for each file. You can use the h5ls command (included with hdf5)
to find the names of datasets within a file.
BUGS
Send bug reports to S. G. Johnson, stevenj@alum.mit.edu.
AUTHORS
Written by Steven G. Johnson. Copyright (c) 1999, 2000, 2001, 2002 by the Massachusetts Institute of Technology.
SEE ALSO mpb(1)MPB January 27, 2000 MPB-DATA(1)