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Nanoscale optical devices
2nd International Conference on Nanotek and Expo
December 3-5, 2012 DoubleTree by Hilton Philadelphia Center City, USA
Paola Barbara
Accepted Abstracts: J Nanomed Nanotechol
Abstract:
One-dimensional and two-dimensional conductors offer exciting opportunities to explore novel design structures for sensing and optoelectronic devices. Here I will discuss two examples. The first is a terahertz sensor based on carbon nanotubes. I will show that carbon nanotube quantum dots coupled to antennas are extremely sensitive, broad?band terahertz quantum detectors with spectral resolution. I will also report a striking and counterintuitive effect: the THz irradiation reduces the effective temperature of the electrons in the dot and drastically increases the device response. I will compare carbon-nanotube based terahertz sensors with graphene-based sensors. The second example is an optoelectronic device based on MoS 2 , a layered semiconductor that can be exfoliated to obtain atomically thin flakes. I will discuss the photovoltaic effect in MoS 2 Schottky diodes made with multilayer flakes. This type of device can open the way to engineering efficient nanoscale photodiodes.