dielectric_trench HiVacuum Wang Chrome STO doped DiffractiveOpticalElements single_layer PMNPT Metal #Materials polyvinyl acetate Lift bias_mode DataStorage Pvdf Scratch vertical_PFM Aluminium_Oxide mechanical_property Vac Genetic AtomicSteps PVA Lanthanum_aluminate ContactMode HafniumDioxide AIN molecular_beam optoelectronics StrontiuTitanate ReflexLens ThermalProperties temp_control MBE