Near-Field Scanning Optical Microscopy of Phase Separation Effects in Dilute Nitride Alloys. View Full Text


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Article Info

DATE

2004

AUTHORS

Alexander Mintairov, Thomas Kosel, Kai Sun, Victor Ustinov, James Merz

ABSTRACT

ABSTRACT The effect of nitrogen composition on structural parameters of intrinsic quantum dots (QDs) has been studied in GaAs 1-y N y and In x Ga1- x As1-yNy alloys ( y ∼0. 015–0.03) using low-temperature near-field scanning optical microscopy (NSOM) combined with magneto-photoluminescence spectroscopy. We used measurements of the diamagnetic shift (magnetic field strength 0–10T), temperature dependent spectra (temperature range 5–300K) and near-field monochromatic images for the estimation of the size, nitrogen excess and density of QDs. The obtained values (size ∼10–30 nm, nitrogen excess ∼0.005 and density ∼100 /μm -3 ) suggest spontaneous formation (phase separation) of QDs. Strong lateral inhomogeniety of the QD distribution on a micron length scale was observed. More... »

PAGES

o3.1

Identifiers

URI

http://scigraph.springernature.com/pub.10.1557/proc-838-o3.1

DOI

http://dx.doi.org/10.1557/proc-838-o3.1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1067959812


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