Curved-lattice epitaxial growth of In(x)Al(1-x)N nanospirals with tailored chirality.

Hsiao, Ching-Lien; Magnusson, Roger; Palisaitis, Justinas; Sandström, Per; Persson, Per O Å; Valyukh, Sergiy; Hultman, Lars; Järrendahl, Kenneth et al. · Nano Lett · 2015

basic_science · Level V

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Abstract

Chirality, tailored by external morphology and internal composition, has been realized by controlled curved-lattice epitaxial growth of In(x)Al(1-x)N nanospirals. The curved morphology of the spiral segments is a result of a lateral compositional gradient while maintaining a preferred crystallographic growth direction, implying a lateral gradient in optical properties. Individual nanospirals show an asymmetric core-shell structure with curved basal planes. Mueller matrix spectroscopic ellipsometry shows that the tailored chirality is manifested in the polarization state of light reflected off the nanospirals.

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