"Constant per-particle driving" simulation script
Former-commit-id: 904f576dd76962581d64813eb1a7682b2f4bacc6
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Marek Nečada
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#!/usr/bin/env python3
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import math
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from qpms.argproc import ArgParser
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figscale=2
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ap = ArgParser(['rectlattice2d_finite', 'single_particle', 'single_lMax', 'single_omega'])
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ap.add_argument("-k", '--wavevector', nargs=2, type=float, required=True, help='"Bloch" vector, modulating phase of the driving', metavar=('KX', 'KY'), default=(0., 0.))
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# ap.add_argument("--kpi", action='store_true', help="Indicates that the k vector is given in natural units instead of SI, i.e. the arguments given by -k shall be automatically multiplied by pi / period (given by -p argument)")
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ap.add_argument("-o", "--output", type=str, required=False, help='output path (if not provided, will be generated automatically)')
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ap.add_argument("-O", "--plot-out", type=str, required=False, help="path to plot output (optional)")
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ap.add_argument("-P", "--plot", action='store_true', help="if -p not given, plot to a default path")
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ap.add_argument("-g", "--save-gradually", action='store_true', help="saves the partial result after computing each irrep")
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#ap.add_argument("--irrep", type=str, default="none", help="Irrep subspace (irrep index from 0 to 7, irrep label, or 'none' for no irrep decomposition")
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a=ap.parse_args()
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import logging
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logging.basicConfig(format='%(asctime)s %(message)s', level=logging.INFO)
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Nx, Ny = a.size
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px, py = a.period
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particlestr = ("sph" if a.height is None else "cyl") + ("_r%gnm" % (a.radius*1e9))
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if a.height is not None: particlestr += "_h%gnm" % (a.height * 1e9)
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defaultprefix = "cd_%s_p%gnmx%gnm_%dx%d_m%s_n%g_k_%g_%g_f%geV_L%d" % (
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particlestr, px*1e9, py*1e9, Nx, Ny, str(a.material), a.refractive_index, a.wavevector[0], a.wavevector[1], a.eV, a.lMax,)
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logging.info("Default file prefix: %s" % defaultprefix)
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import numpy as np
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import qpms
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from qpms.cybspec import BaseSpec
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from qpms.cytmatrices import CTMatrix, TMatrixGenerator
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from qpms.qpms_c import Particle
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from qpms.cymaterials import EpsMu, EpsMuGenerator, LorentzDrudeModel, lorentz_drude
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from qpms.cycommon import DebugFlags, dbgmsg_enable
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from qpms import FinitePointGroup, ScatteringSystem, BesselType, eV, hbar
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from qpms.symmetries import point_group_info
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eh = eV/hbar
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dbgmsg_enable(DebugFlags.INTEGRATION)
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#Particle positions
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orig_x = (np.arange(Nx/2) + (0 if (Nx % 2) else .5)) * px
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orig_y = (np.arange(Ny/2) + (0 if (Ny % 2) else .5)) * py
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orig_xy = np.stack(np.meshgrid(orig_x, orig_y), axis = -1)
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omega = ap.omega
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bspec = BaseSpec(lMax = a.lMax)
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medium = EpsMuGenerator(ap.background_epsmu)
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particles= [Particle(orig_xy[i], ap.tmgen, bspec) for i in np.ndindex(orig_xy.shape[:-1])]
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sym = FinitePointGroup(point_group_info['D2h'])
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ss, ssw = ScatteringSystem.create(particles=particles, medium=medium, omega=omega, sym=sym)
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wavenumber = ap.background_epsmu.k(omega) # Currently, ScatteringSystem does not "remember" frequency nor wavenumber
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outfile_tmp = defaultprefix + ".tmp" if a.output is None else a.output + ".tmp"
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nelem = len(bspec)
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phases = np.exp(1j*np.dot(ss.positions[:,:2], np.array(a.wavevector)))
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driving_full = np.zeros((nelem, ss.fecv_size),dtype=complex)
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for y in range(nelem):
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driving_full[y,y::nelem] = phases
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scattered_full = np.zeros((nelem, ss.fecv_size),dtype=complex)
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scattered_ir = [None for iri in range(ss.nirreps)]
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for iri in range(ss.nirreps):
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logging.info("processing irrep %d/%d" % (iri, ss.nirreps))
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LU = None # to trigger garbage collection before the next call
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translation_matrix = None
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LU = ssw.scatter_solver(iri)
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logging.info("LU solver created")
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#translation_matrix = ss.translation_matrix_packed(wavenumber, iri, BesselType.REGULAR) + np.eye(ss.saecv_sizes[iri])
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#logging.info("auxillary translation matrix created")
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scattered_ir[iri] = np.empty((nelem, ss.saecv_sizes[iri]), dtype=complex)
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scattered_ir_unpacked = np.empty((nelem, ss.fecv_size), dtype=complex)
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for y in range(nelem):
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ã = driving_full[y]
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Tã = ssw.apply_Tmatrices_full(ã)
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Tãi = ss.pack_vector(Tã, iri)
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ãi = ss.pack_vector(ã, iri)
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fi = LU(Tãi)
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scattered_ir[iri][y] = fi
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scattered_ir_unpacked[y] = ss.unpack_vector(fi, iri)
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scattered_full[y] += scattered_ir_unpacked[y]
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if a.save_gradually:
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iriout = outfile_tmp + ".%d" % iri
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np.savez(iriout, iri=iri, meta=vars(a),
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omega=omega, wavenumber=wavenumber, nelem=nelem, wavevector=np.array(a.wavevector), phases=phases,
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positions = ss.positions[:,:2],
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scattered_ir_packed = scattered_ir[iri],
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scattered_ir_full = scattered_ir_unpacked,
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)
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logging.info("partial results saved to %s"%iriout)
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outfile = defaultprefix + ".npz" if a.output is None else a.output
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np.savez(outfile, meta=vars(a),
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omega=omega, wavenumber=wavenumber, nelem=nelem, wavevector=np.array(a.wavevector), phases=phases,
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positions = ss.positions[:,:2],
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scattered_ir_packed = scattered_ir,
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scattered_full = scattered_full,
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)
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logging.info("Saved to %s" % outfile)
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if a.plot or (a.plot_out is not None):
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positions = ss.positions
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xpositions = np.unique(positions[:,0])
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assert(len(xpositions) == Nx)
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ypositions = np.unique(positions[:,1])
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assert(len(ypositions == Ny))
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# particle positions as integer indices
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posmap = np.empty((positions.shape[0],2), dtype=int)
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for i, pos in enumerate(positions):
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posmap[i,0] = np.searchsorted(xpositions, positions[i,0])
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posmap[i,1] = np.searchsorted(ypositions, positions[i,1])
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def fullvec2grid(fullvec):
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arr = np.empty((Nx,Ny,nelem), dtype=complex)
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for pi, offset in enumerate(ss.fullvec_poffsets):
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ix, iy = posmap[pi]
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arr[ix, iy] = fullvec[offset:offset+nelem]
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return arr
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import matplotlib
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matplotlib.use('pdf')
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from matplotlib import pyplot as plt
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t, l, m = bspec.tlm()
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fig, axes = plt.subplots(nelem, 6, figsize=(figscale*6, figscale*nelem))
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axes[0,0].set_title("abs / E,1,−1")
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axes[0,1].set_title("arg / E,1,−1")
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axes[0,2].set_title("abs / E,1,0")
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axes[0,3].set_title("arg / E,1,0")
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axes[0,4].set_title("abs / E,1,+1")
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axes[0,5].set_title("arg / E,1,+1")
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for y in range(nelem):
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axes[y,0].set_ylabel("%s,%d,%+d"%('E' if t[y]==2 else 'M', l[y], m[y],))
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fulvec = scattered_full[y]
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vecgrid = fullvec2grid(fulvec)
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axes[y,0].imshow(abs(vecgrid[...,0]))
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axes[y,1].imshow(np.angle(vecgrid[...,0]))
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axes[y,2].imshow(abs(vecgrid[...,1]))
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axes[y,3].imshow(np.angle(vecgrid[...,1]))
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axes[y,4].imshow(abs(vecgrid[...,2]))
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axes[y,5].imshow(np.angle(vecgrid[...,2]))
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plotfile = defaultprefix + ".pdf" if a.plot_out is None else a.plot_out
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fig.savefig(plotfile)
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exit(0)
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