Dresden 2014 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 35: Poster I: Application of thin films; Focus session: Sensoric micro and nano-systems; Focus Session: Sustainable photovoltaics with earth abundant materials; Graphen (joint session with TT; MA; HL; DY; O); Ion and electron beam induced processes; Layer properties: electrical, optical, and mechanical properties; Magnetic/organic interfaces, spins in organics and molecular magnetism; Micro- and nanopatterning (jointly with O); Organic electronics and photovoltaics (jointly with CPP, HL, O); Thermoelectric materials
DS 35.54: Poster
Mittwoch, 2. April 2014, 17:00–20:00, P1
Structuring of sub-wavelength Au nano-gratings — Christian Dull1, •Gernot Goll1, Silvia Diewald1, Patrice Brenner1, and Dmitry Strelnikov2 — 1DFG-Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — 2Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
Plasmon resonances of noble metal nanostructures are employed for developing sensors used for sensitive detection of molecules. We report on the structuring of arrays of sub-wavelength Au nano-gratings by electron-beam lithography on 20 x 20 mm2 SiO2 wafer pieces coated by a 64-nm thick PMMA resist layer. Sixteen grating arrays were exposed in one run, and the periodicity was varied between 100 nm and 1225 nm from array to array. A typical groove width of W ≈ 16 nm was achieved. After development a 51-nm thick Au layer was evaporated. First measurements of the optical properties show a dip in the reflectance spectrum which moves from 600 to 1000 nm with increasing the periodicity from 400 to 700 nm. The polarization dependance was investigated as well by illuminating the grating with polarized light parallel and perpendicular to the direction of the lines. The result encourages the usage of such functionalized nano-grating surfaces for highly sensitive sensors.