In:
Applied Optics, Optica Publishing Group, Vol. 60, No. 36 ( 2021-12-20), p. 11018-
Abstract:
The nanofabrication platform was carried out using an atomic force microscope (AFM)
system and a continuous wave (cw) laser to investigate the influence of laser power on the underlying mechanism of nanostructures
fabricated by multiphysics fields tip enhancement (MFTE) induced by a cw laser irradiating the AFM probe tip. The nanostructure fabrication
of nanopits and grooves and nanodots and lines on a polymethyl methacrylate thin film was conducted in an ambient environment by
changing the incident laser power. The dependence of the MFTE on laser power was numerically analyzed, too. The lateral dimensions of
nanopits and grooves and nanodots and lines characterized in situ were 154 nm, 96 nm, 188 nm,
and 25 nm, respectively, breaking the optical diffraction limit. It turned out that the nanostructures converted from craters (pits and
grooves) to protrusions (dots and lines) when altered with the laser power. Different laser powers can trigger the MFTE to change, thus,
inducing varied coupling energy, which is the essential mechanism for nanostructure conversion. We also established a model to analyze the
nanostructures transition and to predict the dimensions of nanostructures. The simulation results demonstrate that the MFTE has
an essential effect on the formation of nanostructures, which are in good agreement with the experimental results.
Type of Medium:
Online Resource
ISSN:
1559-128X
,
2155-3165
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2021
detail.hit.zdb_id:
207387-0
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