Photovoltaics DiffractiveOpticalElements AIN Piezoresponse mechanical property Wafer self_assembly OpticalElement WS2 Hafnia Wonseok Ca10(PO4)6(OH)2 Resistance Mobile aluminum_nitride Lift CalciumHydroxide Ram PatternedSapphireSubstrat hard_disk Polyethylene CalciumHydroxyapatite Terrace Mfm Sic PinPointMode NusEce Chromium SurfaceOxidation PrCurve HighAspect IISCBangalore SKPM Electronics flakes