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Nano-aperture fabrication for single quantum dot spectroscopy

2003; IOP Publishing; Volume: 14; Issue: 6 Linguagem: Inglês

10.1088/0957-4484/14/6/321

1361-6528

Ulf H kanson, Jonas Persson, Filip Persson, H. Svensson, Lars Montelius, Mikael Johansson,

Plasmonic and Surface Plasmon Research

We present a simple and controllable method for fabricating nano-apertures in a metal film using polystyrene nano-spheres as masks during the metal evaporation. We show how the processing conditions used during deposition of the spheres such as spin velocity, nano-sphere concentration and a reduction of the surface tension interplay and control the distribution of spheres. The fabrication method is ideal for luminescence studies by isolating individual nanometre-sized objects, which is exemplified by photoluminescence spectroscopy of single self-assembled Stranski–Krastanow quantum dots.