Electical&Electronics OpticalModulator MonoLayer temp Strontium PinPointMode HexagonalBN Granada TungstenThinFilmDeposition membrane amplitude_modulation NiFe fluoroaalkane Thermoplastic_polyurethane Polydimethylsiloxane EPFL tip_bias_mode PVAC Sapphire VinylAlcohol Ceramic self_assembly PFM bias_mode non_contact FailureAnlaysis HOPG MoirePattern contact MembraneFilter dielectric trench Mapping OpticalElement suspended_graphene Silver