Artículos de revistas
Directed self-assembly of quantum structures by nanomechanical stamping using probe tips
Fecha
2008Registro en:
NANOTECHNOLOGY, v.19, n.1, 2008
0957-4484
10.1088/0957-4484/19/01/015301
Autor
TAYLOR, Curtis
MAREGA, Euclydes
STACH, Eric A.
SALAMO, Gregory
HUSSEY, Lindsay
MUNOZ, Martin
MALSHE, Ajay
Institución
Resumen
We demonstrate that nanomechanically stamped substrates can be used as templates to pattern and direct the self-assembly of epitaxial quantum structures such as quantum dots. Diamond probe tips are used to indent or stamp the surface of GaAs( 100) to create nanoscale volumes of dislocation-mediated deformation, which alter the growth surface strain. These strained sites act to bias nucleation, hence allowing for selective growth of InAs quantum dots. Patterns of quantum dots are observed to form above the underlying nanostamped template. The strain state of the patterned structures is characterized by micro-Raman spectroscopy. The potential of using nanoprobe tips as a quantum dot nanofabrication technology are discussed.