heterojunctions CeNSE_IISc dielectric_trench OpticalElement Pyroelectric TPU silicon_oxide Gallium HexagonalBN Workfunction GaP Epoxy Piranha silicon_carbide Phosphide Polyimide Butterfly Ito PolycrystallineFerroelectricBCZT Optic neodymium_magnets FailureAnalysis SThM LMF hard_disk_media lithography TappingMode HexagonalBoronNitride DIWafer Wildtype FrequencyModulation MagneticForceMicroscopy single_layer MembraneFilter FFM