KEYWORDS: Nanofibers, Luminescence, Spectroscopy, Near field optics, Atomic force microscopy, Fluorescence spectroscopy, Near field scanning optical microscopy, Scanning tunneling microscopy, Molecules, Mica
Nanoscaled photonic devices rely on a thorough understanding of
the influence of microscopic morphological changes on the
optoelectronic properties. Here, we investigate as a model system
organic nanofibers from para-phenylene molecules, which provide
high flexibility in terms of controlled growth manipulation, while
on the other hand showing self assembled multiplication of
individual entities. Examples on selective spectroscopy, scanning
fluorescence optical microscopy and waveguiding of individual
nanofibers as well as arrays of nanofibers are given. Both the
linear optical properties as well as the waveguiding efficiency
are strongly related to the nanofibers morphology, which turn out
to be an interesting benchmark system for the investigation of the
applicability of a variety of optical methods in the nanodomain.
Nanoparticles (clusters) of type II-VI semiconductor materials (CdS, CdSe, CdTe) have been prepared with average diameters between 1 nm and 25 nm using precipitation methods in aqueous or organic solutions and deposited on oxidic substrates. The intrinsic electronic structure of these particles with sizes around the excitonic Bohr radius of the respective materials has been investigated by a combination of optical spectroscopy methods including reflection/transmission measurements, photoluminescence, Raman spectroscopy, absorption saturation and second harmonic generation (SHG) measurements. Together with supporting information on the morphology and the arrangement of the particles obtained from Transmission Electron Microscopy (TEM), Scanning Probe Microscopy and X-Ray diffraction we were able to determine the size dependence of excitonic excitations within the clusters, following in good agreement theoretical predictions derived from quantum mechanical, extended particle-in-a-box models.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.