CEN Webinars: Stronger Bonds

High-Resolution Optical Characterization
of Nanostructures using Metal Antennas

 

Tuesday, June 11, 2013

USA 11:00 a.m. EDT, 10:00 a.m. CDT, 8:00 a.m. PDT, 16:00 BST

 

Speaker


Achim Harschuh, Ph.D.
Professor at Ludwig-Maximilians-Universitaet Muenchen
Department Chemie and CeNS


Moderator


Emily Bones
Associate Editor
C&EN
 


Overview:


Several concepts have been developed in the last decades to overcome the resolution limit of conventional optical microscopy imposed by diffraction. Powerful far-field methods that exploit particular properties of highly fluorescent emitters are capable of 3D imaging with nanoscale resolution. Near-field techniques, on the other hand, make use of the rapid decay of evanescent waves close to pointed probes to visualize sample surfaces. Optical antennas are a promising near-field scheme in which the length-mismatch between the wavelength of visible light and the dimensions of nanoscale objects is bridged by metal nanostructures.

Topics Covered:


• Basics of near-field optical microscopy and its experimental requirements

• Fundamentals of antenna-enhanced near-field optical microscopy and spectroscopy

• Experimental realizations

• Recent applications including photoluminescence, high-resolution raman and photocurrent microscopy of single inorganic nanowires and carbon nanotubes at a spatial resolution of about 20 nm

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