Browse: Keyword: Nanophotonics

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A Gentle Introduction to Nanotechnology and Nanoscience

Abstract:: While the Greek root nano just means dwarf, the nanoscale has become a giant focus of contemporary science and technology. We will examine the fundamental issues underlying the excitement involved in nanoscale research - what, why and how. Specific topics include assembly, properties, applications and societal issues.

Nanoscale Antenna Apertures

Abstract:: This presentation will discuss light concentration and enhancement in nanometer-scale ridge aperture antennas. Resent research, including numerical simulations and near field optical measurements has demonstrated that nanoscale ridge antenna apertures can concentrate light into nanometer domain. More importantly, these ridge antenna apertures also provide enhanced optical transmission several orders of magnitude higher than regularly shaped nano-apertures. We will discuss fundamental theories of ridge antenna apertures, finite-difference time-domain (FDTD) calculations for optimizing the design of these antenna apertures, and near field scanning optical microscope (NSOM) measurements of the near field intensity distribution of the light transmitted through these apertures. It is shown that the nanoscale antenna apertures can produce a concentrated light spot beyond the diffraction limit with enhanced transmission. Potential applications of these nanoscale aperture antennas include nano-lithography and nano-imaging.

Abstract:: Welcome to the Nanotechnology 501, a series of lectures designed to provide an introduction to nanotechnology.

Abstract:: What is a nanowire? What is a nanotube? Why are they interesting and what are their potential applications? How are they made? This presentation is intended to begin to answer these questions while introducing some fundamental concepts such as wave-particle duality, quantum confinement, the electronic structure of solids, and the relationship between size and properties in nanomaterials.

Abstract:: Quantum Dots are man-made artificial atoms that confine electrons to a small space. As such they have atomic-like behavior and enable the study of quantum mechanical effects on a length scale that is around 100 times larger than the pure atomic scale. Quantum dots offer application opportunities in optical sensors, lasers, and advanced electronic devices for memory and logic. This seminar starts with an overview of wavelike and particle like properties and motivates the existence of quantum mechanics. It closes the quantum mechanics point of view with these new fascinating artificial atoms.