Halldór Svavarsson - Large-Scale Fabrication of Periodic Nanostructure Arrays
Fyrirlesturinn verður haldinn mánudaginn 6. september kl. 12:00-13:00 í húsnæði Háskólans í Reykjavík í Nauthólsvík í stofu M1.05.
Dr. Halldór Guðfinnur Svavarsson
Tækni- og verkfræðideild
Háskólinn í Reykjavík
Abstract:
Nanostructures, such as nanowires, nanocups and nanodots, are topics of immense interest. This interest is partly due to their geometry-dependent optical resonances which offer the ability to manipulate light in ways not possible with conventional optical materials. Electromagnetic waves can for example couple with metal nanostructures to support surface plasmon excitation that leads to significant enhancement of local electromagnetic field around the nanostructure [1]. Metallic nanocups or nanobowls have the ability to redirect scattered light in a direction dependent on cup orientation at their magnetoinductive resonance [2], a property which is of great concern for solar concentrators. Semiconducting nanowires have gained large interest in photovoltaic applications where their capability to reduce light scattering and increase surface area are important.
A procedure for fabricating large-area and ordered nanostructure arrays is reported here. The arrays are made of a template of photoresist pattern applied to a flat substrate by using holographic laser interference lithography and subsequent gold deposition.
References
[1]. SERS on periodic arrays of coupled quadrate-holes and squares. Hou, Yumin, et al., 2010, Nanotechnology, 21.
[2]. Light bending Nanoparticles. Mirin, Nocolay A. and Halas, Naomi J., 2009, Nano Letters, 9, pp. 1255-1259.
