Size-dependent near-field coupling observed from InN nanodots grown on nitrided sapphire

• Published in: Chemical physics letters Vol. 443; no. 4; pp. 333 - 336
• Main Authors: Stebounova, Larissa V., Romanyuk, Yaroslav E., Dengel, Radu-Gabriel, Leone, Stephen R.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 06-08-2007
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2007.06.093

Size-dependent near-field signal collected from the InN nanodots at visible wavelengths is described by the expanded coupled dipole model.
Optical contrast from InN nanodots grown on nitrided sapphire is investigated using apertureless near-field scanning optical microscopy at two different visible wavelengths, 633
nm and 532
nm. The dependence of the near-field signal on the size of the dots is described using a coupled dipole model expanded to four dipoles. The near-field signal from InN dots with a height of <1
nm is detected due to dipole–dipole coupling.