{"benchmark":"1D periodic Yee standing wave, c=epsilon=mu=1, L=1, mode=2, t=0.37","grids":[40,80,160,320],"rms_errors":[0.01038969739302008,0.0025742988235160965,0.0006373410336885479,0.0001585533198419339],"observed_orders":[2.012902199562428,2.0140420773616747,2.0070974628488805],"checks_passed":{"all_finite":true,"second_order":true},"engineering_example":{"dx_nm":20,"dt_attoseconds":36.59083082938294,"steps_for_200fs":5466,"cells":144000000,"six_float32_fields_GB":3.456,"NA":0.4472135954999579,"edge_phase_rad":-13.940402704156769,"edge_optical_path_um":1.180339887498949,"airy_FWHM_um":0.6114483163113625},"scope":"Analytic teaching figures plus a 1D solver benchmark; no actual metalens FDTD results."}