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ChangeLog
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ChangeLog
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- Better handling of near-singular matrices in GARCLED.py.
- Added routines to Geometry to convert images into an Expression
(Lieven Vanholme).
CAMFR 1.3:
- Added code to model spontaneous emission and light extraction in light
emitting diodes, both for planar structures and for structures with a
2D periodic grating in the cavity or in the substrate.
- Now a BlochStack can also be used inside a Stack, either as first term,
last term or both:
bs = BlochStack(...)
s = Stack(bs(0) + ... + bs(0))
In this case, the reflection and transmission coefficients relate to
BlochModes, rather than to the SlabModes in the last slab of the
BlochStack, which is much more useful. (Pieter Dumon)
- All plotting functions like plot(stack), animate_field(), ... are now
class member functions and need to be called as stack.plot().
- By default, NumPy and matplotlib are imported to create a more
complete Matlab-like environment. SciPy is also required for the RCLED
modelling code.
- Added Dispersive_Material_Factory, to make it easier to work with
materials whose index is defined as a table in a text file.
- Reworked manual, a.o. integrating plotting more with the rest of the
examples.
- Better stability when joining together two slabs which are each other's
mirror image. (This can occur when modelling triangular lattices.)
- New solver for 1D slabs based on adaptive spatial resolution. Very useful
for metallic structures. (Peter Debackere)
- Stack.fw_bw() and BlochMode.fw_bw() can now take an optional extra argument
to specify the limit value of z, i.e. Plus or Min.
- get_kt() and set_kt() for Planars now works again (Peter Vandersteegen).
- Fix field plot bug for Planars.
- The wavelength can now be complex (Thanks to KC Huang for requesting this)
- Extra stability when working with backwards and complex modes.
- The 'filename' argument in the plotting functions is now a named argument
rather than a positional one, i.e. it has to be specified by
filename="string", rather than just by "string" on the correct position.
CAMFR 1.2 (2003-11-12):
- circular structures can now have multiple radial discontinuities (Mihai
Ibanescu)
- interactive plotting utilities (Lieven Vanholme) to look at fields,
animations, Poynting vectors, save to file, zoom in, ... . Try
plot(Stack), plot(Slab), plot(BlochStack)
- improved stability for Slabs, especially for wide photonic crystal
structures
- a new solver suitable for high loss materials. See set_solver(series)
- added various small utility functions: Stack.width(), BlochStack.width(),
Cavity.width(), Cavity.length(), Cavity.bot_stack(), Cavity.top_stack()
- the MATLAB bindings are updated to the latest versions of MATLAB and
pymat (the latter needs to be installed separately from
http://pymat.sf.net) (Ross Stanley)
CAMFR 1.1 (2003-03-05):
- improved stability for Slabs
- inc_S_flux and ext_S_flux are now much faster
- Python doesn't terminate abruptly anymore when faced with some user
errors or lost modes
- the refractive index profile can now be displayed on top of the
field plots (Lieven Vanholme)
- animation of field profiles is much smoother (Lieven Vanholme)
- field plots can be saved in a variety of formats (jpg, gif, png, ...)
Animations can be saved as an (uncompressed) animated gif (Lieven Vanholme)
e.g. plot_field(s, lambda f : f.E2().real, r_x, r_z, "field.jpg")
- plot_n and plot_field now works for BlochStacks, BlochModes and Cavities
too
- added Stack.fw_bw(z), which returns a tuple of the expansion
coefficients of the forward and backward field at position z in the Stack.
Also works for Blochmodes.
e.g. fw, bw = stack.fw_bw(0)
fw, bw = blochstack.mode(0).fw_bw(0)
- Cavity.find_modes_in_region() has been renamed to Cavity::find_all_modes()
- the constructor for Cavity has been changed from Cavity(top, bottom) to
Cavity(bottom,top). This makes the coordinate system more intuitive.
- arbitrary sources can now be placed inside a cavity
e.g. cavity.set_source(fw, bw)
- fixed memory corruption when doing exotic things with Expressions
- fixed crash when plotting uniform layers or planars
CAMFR 1.0 (2002-09-24):
- faster binaries, especially under Windows, which can be up to three
times faster than CAMFR 0.9
- new way of defining complicated structures using geometric shapes and
automatic discretisation
- more excitations for cartesian structures: gaussians, plane waves
and arbitrary shaped functions (Lieven Vanholme)
- support for stacks terminated by an infinite repetition of a basic
period
- more robust method of calculating Bloch modes (Lieven Vanholme)
and their field profiles
- Matlab link under Windows is by default enabled and installed
- integrated plotting and animation routines for field profiles in a stack
(Lieven Vanholme), optionally using Matlab as backend
- added stack.n(), stack.mu() and stack.eps()
- added Poynting vector components field.S1(), field.S2() and field.Sz()
and its magnitude field.abs_S()
- better handling of loosely coupled or degenerate waveguides
- better handling of metals, also metals with purely imaginary refractive
index
- more flexible way of plotting field profiles of modes
- CAMFR now runs reliably under graphical IDE environments like Idle
or ActiveState's PythonWin
- various documentation updates and minor bugfixes
- more graceful handling of user errors
Important to note if you are upgrading from a pre 1.0 version of CAMFR are
the following changes:
- set_left_wall and set_right_wall are replaced by set_lower_wall and
set_upper_wall respectively
- imaginary thicknesses and coordinates are deprecated: PML is set by
set_lower_PML, set_upper_PML and set_circ_PML
CAMFR 0.9 (2001-09-06):
- initial public release