Iwant to simulate a fiber modulator in lumerical mode solution by eigensolver but the results depend on simulation region size. what is the simulation region size at metal boundary condition in lumerical mode solution?
furthermore after eigenmode analysis in mode solution, i can't recognize te and tm mode in mode list. is the first te mode and the second tm?
i would be very grateful if someone answer my two questions.

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.