Aligned carbon nanotubes as polarization-sensitive, molecular near-field detectors

Near-field scanning optical microscopes are widely used in imaging of subwavelength features in various material systems and nanostructures. For a variety of applications, polarization-sensitive near-field probes can provide valuable information on the nature and symmetry of the imaged nanoparticles...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2009-02, Vol.106 (8), p.2495-2499
Main Authors: Cubukcu, Ertugrul, Degirmenci, Fatih, Kocabas, Coskun, Zimmler, Mariano A, Rogers, John A, Capasso, Federico
Format: Article
Language:English
Subjects:
Antenna arrays
Antennas
Carbon
Carbon nanotubes
Imaging
Lasers
Microscopes
Molecular structure
Molecules
Nanoparticles
Nanotubes
Near fields
Optical resonance
Physical Sciences
Raman scattering
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Summary:Near-field scanning optical microscopes are widely used in imaging of subwavelength features in various material systems and nanostructures. For a variety of applications, polarization-sensitive near-field probes can provide valuable information on the nature and symmetry of the imaged nanoparticles and emitters. Conventional near-field optical microscopy lacks in-plane polarization sensitivity. Here, we use aligned single-wall carbon nanotubes as polarization-sensitive molecular scale probes to image the transverse near-field components of an optical Hertzian dipole antenna. Because of the Raman "antenna effect" in carbon nanotubes, only the near-field components along the nanotube axis are detected. These findings demonstrate that aligned carbon nanotubes can be used as polarization-sensitive near-field detectors.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.0812217106